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From: Tim Chown <tjc@ecs.soton.ac.uk>
To: dhcwg@ietf.org
Subject: Re: [dhcwg] Internet Drafts to be reviewed by the dhc WG
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Sorry :)

Yes, if it is going to happen, it should have dhc WG eyes over it.

On Wed, Mar 31, 2004 at 09:12:20PM -0500, Ralph Droms wrote:
> OK - the *original* question was "Is there any objection to taking on this
> review as a dhc WG work item, pending acceptance of the documents by the
> midcom WG?"
> 
> Let me extend that question to ask for positive responses, as well - please
> respond "yes" or "no" to the question "Should the dhc WG take on review of
> draft-tran-midcom-dhcp-option-00.txt and
> draft-tran-midcom-dhcpv6-option-00.txt, pending acceptance of the documents
> by the midcom WG?"
> 
> - Ralph
> 
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg

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From dhcwg-admin@ietf.org  Thu Apr  1 15:34:07 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] Internet Drafts to be reviewed by the dhc WG
Date: Thu, 1 Apr 2004 09:18:29 -0500
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No objection - we should review the options for consistency with DHCP.

I'm also not sure why there is a need to ask as this is clearly in the
WG's current charter:

The DHC WG is responsible for reviewing (and sometimes developing)
DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
is expected to review all proposed extensions to DHCP to ensure that
they are consistent with the DHCP specification and other option
formats, that they do not duplicate existing mechanisms, etc. The DHC
WG will not (generally) be responsible for evaluating the semantic
content of proposed options. The DHC WG will not adopt new proposals
for extensions to DHCP as working group documents without first
coordinating with other relevant working groups and determining who
has the responsibility for reviewing the semantic content of an
option.


- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ralph Droms
Sent: Wednesday, March 31, 2004 9:12 PM
To: dhcwg@ietf.org
Subject: Re: [dhcwg] Internet Drafts to be reviewed by the dhc WG


OK - the *original* question was "Is there any objection to taking on
this review as a dhc WG work item, pending acceptance of the documents
by the midcom WG?"

Let me extend that question to ask for positive responses, as well -
please respond "yes" or "no" to the question "Should the dhc WG take on
review of draft-tran-midcom-dhcp-option-00.txt and
draft-tran-midcom-dhcpv6-option-00.txt, pending acceptance of the
documents by the midcom WG?"

- Ralph



_______________________________________________
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dhcwg@ietf.org
https://www1.ietf.org/mailman/listinfo/dhcwg


_______________________________________________
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https://www1.ietf.org/mailman/listinfo/dhcwg


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Date: Sat, 03 Apr 2004 11:29:21 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] Drafts ready for WG last call
In-reply-to: <4.3.2.7.2.20040315104633.01f70fc0@flask.cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, dhcwg@ietf.org
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Is there any expressed opposition for progressing these draft ?


- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Ralph Droms
> Sent: Tuesday, March 16, 2004 12:52 AM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Drafts ready for WG last call
> 
> 
> Several drafts were considered for dhc WG last call at the WG 
> meeting in
> Seoul.  I'm writing to confirm consensus for WG last call on 
> these drafts.
> Please respond (affirm, comment, disagree selectively) to the 
> dhcwg mailing
> list about initiating a WG last call on the following drafts:
> 
> 
>    DHCP Option for Proxy Server Configuration
>    <draft-ietf-dhc-proxyserver-opt-00>
> 
>    Vendor-Identifying Vendor Options for DHCPv4
>    <draft-ietf-dhc-vendor-01>
> 
>    Node-Specific Client Identifiers for DHCPv4
>    <draft-ietf-dhc-3315id-for-v4-01>
> 
>    Rapid Commit Option for DHCPv4
>    <draft-ietf-dhc-rapid-commit-opt-00>
> 
>    Reclassifying DHCPv4 Options
>    <draft-ietf-dhc-reclassify-options-00>
> 
> - Ralph
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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Cc: "'Ralph Droms'" <rdroms@cisco.com>, dhcwg@ietf.org
From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] Drafts ready for WG last call
Date: Fri, 2 Apr 2004 20:41:50 -0600
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On Apr 2, 2004, at 8:29 PM, S. Daniel Park wrote:
> Is there any expressed opposition for progressing these draft ?

We were expecting some of them to get minor edits in last call, I 
think.   You can refer to the DHCwg meeting minutes for details.


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From dhcwg-admin@ietf.org  Sat Apr  3 06:48:30 2004
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Date: Sat, 03 Apr 2004 06:44:57 -0500
To: "S. Daniel Park" <soohong.park@samsung.com>
From: Ralph Droms <rdroms@cisco.com>
Subject: RE: [dhcwg] Drafts ready for WG last call
Cc: dhcwg@ietf.org
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Are you asking about opposition to initiating a WG last
call on these drafts?   Assuming there are no objections
to WG last calls on these drafts (I haven't seen any to date),
I'll start the last calls early next week.

- Ralph


At 11:29 AM 4/3/2004 +0900, S. Daniel Park wrote:

>Is there any expressed opposition for progressing these draft ?
>
>
>- Daniel (Soohong Daniel Park)
>- Mobile Platform Laboratory, SAMSUNG Electronics.
>
> > -----Original Message-----
> > From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On
> > Behalf Of Ralph Droms
> > Sent: Tuesday, March 16, 2004 12:52 AM
> > To: dhcwg@ietf.org
> > Subject: [dhcwg] Drafts ready for WG last call
> >
> >
> > Several drafts were considered for dhc WG last call at the WG
> > meeting in
> > Seoul.  I'm writing to confirm consensus for WG last call on
> > these drafts.
> > Please respond (affirm, comment, disagree selectively) to the
> > dhcwg mailing
> > list about initiating a WG last call on the following drafts:
> >
> >
> >    DHCP Option for Proxy Server Configuration
> >    <draft-ietf-dhc-proxyserver-opt-00>
> >
> >    Vendor-Identifying Vendor Options for DHCPv4
> >    <draft-ietf-dhc-vendor-01>
> >
> >    Node-Specific Client Identifiers for DHCPv4
> >    <draft-ietf-dhc-3315id-for-v4-01>
> >
> >    Rapid Commit Option for DHCPv4
> >    <draft-ietf-dhc-rapid-commit-opt-00>
> >
> >    Reclassifying DHCPv4 Options
> >    <draft-ietf-dhc-reclassify-options-00>
> >
> > - Ralph
> >
> >
> > _______________________________________________
> > dhcwg mailing list
> > dhcwg@ietf.org
> > https://www1.ietf.org/mailman/listinfo/dhcwg
> >


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From dhcwg-admin@ietf.org  Sun Apr  4 19:39:37 2004
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From: Pekka Savola <pekkas@netcore.fi>
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Subject: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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Hi,

I glanced through draft-ietf-dhc-dhcpv6-ctep-opt-01.txt.  I also 
discussed this problem space with Vijay in IETF59.

I think the applicability and usefulness of this option is *very* 
questionable.

As it is a DHCPv6 option, it can be only used inside v6 sites with
basically their own DHCPv6 server in each.

That is, imagine that you wanted to connect 10 sites together from
their border router using full-mesh configured tunneling.  You'll have 
to set up 9 tunnels in each site, 9*10 tunnels in total.  

What's the gain of using DHCPv6 here, I ask?  You'll have to set up
these 9 tunnels in each of the 10 DHCPv6 servers in any case, 90
DHCPv6 configuration entries in total.  You're trading off having to
configure 90 tunnels in 10 border routers to having to configure 90
tunnels in 10 DHCPv6 servers.

IMHO, in this kind of set-up, Using DHCPv6 just doesn't seem to make 
sense.

Is there something I've missed?

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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From dhcwg-admin@ietf.org  Sun Apr  4 21:17:32 2004
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From: "Bernie Volz" <volz@cisco.com>
To: <joel.tran@usherbrooke.ca>, <soumaya.cherkaoui@usherbrooke.ca>
Cc: <dhcwg@ietf.org>
Subject: RE: [dhcwg] Internet Drafts to be reviewed by the dhc WG - midcom options
Date: Sun, 4 Apr 2004 21:13:28 -0400
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Here's some nits regarding draft-tran-midcom-dhcpv6-option-00.txt (and
also -01 which is now posted but identical):

- Abstract: "Dynamic Host Configuration Protocol for IPv6" would be
better than "Dynamic Host Configuration Protocol version 6".

- 1 Terminology: MIDCOM should be Midcom to be consistent with usage
throughout doc? Functionnality should be functionality. There's also a
bunch of non 7-bit ASCII characters in the "Midcom Agent" definition?

- 2 Introduction: "the domain name[s] of the Midcom". And, also "or the
domain name[s] of Midcom middleboxes". (Make plural!)

- 4 Midcom Middlebox DHCPv6 Option - "list of [] 128-bit [] IPv6
addresses or, preferably, [a] DNS [RFC1035] domain name[s]."

- 4.2 Midcom Middlebox IPv4 Address List - should be "IPv6", not IPv4.

- Table 1 (in Section 5.2): There is a MUST, but this is only if there
is an address configured.

- 5.2 Midcom Middlebox DHCPv6 Server Option Operation: "This server MAY
send one" ... Is use of "MAY" correct here? I think it should be "This
server should send ..."? The table provides the rules.

I haven't looked at draft-tran-midcom-dhcp-option-01.txt (DHCPv4 option)
- but some of the above nits likely apply there as well.


I don't see anything particularily wrong with these DHCPv6 options,
though as I posted the other day, I think the DHC WG should take on the
issue as to whether this is the best way to handle the ability to
configure addresses and domain names (two options), or whether, as Ted
suggested in a response to my post, to send only addresses.

I guess a good question to Joel and Soumaya is whether just sending
addresses would cause any significant issues?

- Bernie Volz


-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ralph Droms
Sent: Wednesday, March 31, 2004 1:24 PM
To: dhcwg@ietf.org
Cc: margaret@thingmagic.com; narten@us.ibm.com; Melinda Shore
Subject: [dhcwg] Internet Drafts to be reviewed by the dhc WG


There are a couple of Internet Drafts under review by the midcom WG that
specify new DHCP options:

draft-tran-midcom-dhcp-option-00.txt
draft-tran-midcom-dhcpv6-option-00.txt

Based on our current charter, the dhc WG should consider collaborating
with the midcom WG on the review of these specifications; specifically,
the dhc WG should review the syntax of the options for adherence to DHCP
requirements and consistency with other DHCP options, while the midcom
WG will review the semantics associated with the options.

Is there any objection to taking on this review as a dhc WG work item,
pending acceptance of the documents by the midcom WG?  Note that the
drafts themselves will appear as midcom WG documents (if taken on by the
midcom WG).

- Ralph


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From dhcwg-admin@ietf.org  Sun Apr  4 21:17:32 2004
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Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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On Apr 2, 2004, at 7:44 AM, Pekka Savola wrote:
> You're trading off having to
> configure 90 tunnels in 10 border routers to having to configure 90
> tunnels in 10 DHCPv6 servers.
>
> IMHO, in this kind of set-up, Using DHCPv6 just doesn't seem to make
> sense.

Possibly it's easier to configure a DHCP server on a central server 
somewhere with all this information rather than configuring the router, 
because if the router dies then you have to remember to reconfigure it. 
   But basically, I don't know.   :')


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From dhcwg-admin@ietf.org  Mon Apr  5 06:29:47 2004
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From: Pekka Savola <pekkas@netcore.fi>
To: Ted Lemon <mellon@fugue.com>
cc: dhcwg@ietf.org
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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On Sun, 4 Apr 2004, Ted Lemon wrote:
> On Apr 2, 2004, at 7:44 AM, Pekka Savola wrote:
> > You're trading off having to
> > configure 90 tunnels in 10 border routers to having to configure 90
> > tunnels in 10 DHCPv6 servers.
> >
> > IMHO, in this kind of set-up, Using DHCPv6 just doesn't seem to make
> > sense.
> 
> Possibly it's easier to configure a DHCP server on a central server 
> somewhere with all this information rather than configuring the router, 
> because if the router dies then you have to remember to reconfigure it. 
>
>    But basically, I don't know.   :')

You'll have to reconfigure the router in any case to get the other 
connectivity working ;-).

Here, you don't get aggregation benefits as you have to configure
exactly the same information in 10 DHCPv6 servers as you'd have to do
in 10 routers.  If you would only need to configure 1 DHCPv6 server to
get the config to all the routers, some folks might think this gives 
additional benefits.

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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draft-ietf-dhc-proxyserver-opt-00 defines a new DHCP option, which can be
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Summary: The DHCP options for Vendor Class and Vendor-Specific Information
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draft-ietf-dhc-rapid-commit-opt-00 defines a new DHCPv4 option, modeled on
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information using a 2-message exchange rather than the usual 4- message
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This message announces a WG last call on "Reclassifying DHCPv4 Options"
<draft-ietf-dhc-reclassify-options-00>.  The last call will conclude at 5PM
EST on 4/16/04.

Please respond to this WG last call.  If you support acceptance of the
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draft-ietf-dhc-reclassify-options-00 revises RFC 2132 to reclassify DHCPv4
option codes 128 to 223 (decimal) as publicly defined options to be managed
by IANA in accordance with RFC 2939. This document directs IANA to make
these option codes available for assignment as publicly defined DHCP options
for future options..  This draft is available as
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From: Martin Stiemerling <stiemerling@netlab.nec.de>
To: Tim Chown <tjc@ecs.soton.ac.uk>, Ralph Droms <rdroms@cisco.com>
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--On Mittwoch, 31. M=E4rz 2004 21:50 Uhr +0100 Tim Chown=20
<tjc@ecs.soton.ac.uk> wrote:

| On Wed, Mar 31, 2004 at 01:24:05PM -0500, Ralph Droms wrote:
|> There are a couple of Internet Drafts under review by the midcom WG that
|> specify new DHCP options:
|>
|> draft-tran-midcom-dhcpv6-option-00.txt
|
| So this one assumes that IPv6 NATs exist and midcom will handle IPv6 NAT
| traversal?  Or s midcom for IPv6 a means to configure the middlebox for
| other ALG or firewall purposes?

Hmm, I don't see any assumption saying that there will be IPv6 NATs. The=20
document ist just saying that the MIDCOM server can be reached via IPv6,=20
whether there is a NAT at the box or not is a different story.

  Martin

|
| Luckily I don't think Keith Moore is on the dhc WG list :)
|
| Tim
|
| _______________________________________________
| dhcwg mailing list
| dhcwg@ietf.org
| https://www1.ietf.org/mailman/listinfo/dhcwg



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On Mon, Apr 05, 2004 at 03:54:57PM +0200, Martin Stiemerling wrote:
> 
> Hmm, I don't see any assumption saying that there will be IPv6 NATs. The 
> document ist just saying that the MIDCOM server can be reached via IPv6, 
> whether there is a NAT at the box or not is a different story.

Taken from the intro draft-tran-midcom-dhcpv6-option-01:

  "Entities using the Midcom Protocol need to know the
   presence of Midcom middleboxes, such as firewalls and network address
   translators, in order to enable communication across theses devices.
   A DHCPv6 option provides a means for these entities to determine the
   Midcom middleboxes IPv6 address or the domain name."

But that text is cut and paste from the IPv4 version of the draft.
Perhaps the v6 version can omit mention of translators? (If people use
it for that, so be it, but we're not then "suggesting" it...)

Tim

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Paragraph 2 of Section 4.4.1 of RFC2131 implies that T1, 
T2, and the lease expiration time are all computed relative 
to the time that the client sends the DHCPDISCOVER.

Is this correct, or should these values be computed relative 
to the time that the client acquires the lease (i.e. when it
receives the DHCPACK)?

In a perfect world, the former would make sense because the
time to get from DISCOVER to ACK should be just a couple of 
seconds at most. 

In a not so perfect world, the latter would make sense. For
example, if the network or DHCP server is not performing very
well, it may take many seconds and several retries to actually
get from DISCOVER to ACK. If this happens and the DISCOVER time 
is the reference, then there could be a considerable discrepency 
between the client's and server's notion of when the lease 
should expire.

Am I correct, or did I miss another section of the document that
clarifies this?

--kan--
--
Kevin A. Noll, KD4WOZ
CCIE 10948, CCDP
Perfect Order, Inc.		
Kevin.Noll@perfectorder.com
717-796-1936


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From dhcwg-admin@ietf.org  Mon Apr  5 16:06:38 2004
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From: "Joel Tran" <joel.tran@USherbrooke.ca>
To: "'Bernie Volz'" <volz@cisco.com>, <soumaya.cherkaoui@USherbrooke.ca>
Cc: <dhcwg@ietf.org>
Subject: RE : [dhcwg] Internet Drafts to be reviewed by the dhc WG - midcom options
Date: Mon, 5 Apr 2004 15:43:20 -0400
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Hi Bernie,

Thanks for your input,

The two versions -00 and -01 are identical due to some posting mistakes made
with the DHCPv4 document. I reposted the two documents (DHCPv4/DHCPv6) to
avoid all confusions.

I will fix the topo mistake in the next version.

We use of two options (IP addresses/DNS addresses) for a reason. IP have
less overhead (implementation of a DNS client). However, in some large
corporate networks, DNS SRV could be used in order to provide a distributed
Midcom service.

...J


> -----Message d'origine-----
> De : Bernie Volz [mailto:volz@cisco.com]
> Envoyé : 4 avril, 2004 21:13
> À : joel.tran@usherbrooke.ca; soumaya.cherkaoui@usherbrooke.ca
> Cc : dhcwg@ietf.org
> Objet : RE: [dhcwg] Internet Drafts to be reviewed by the dhc
> WG - midcom options
>
>
> Here's some nits regarding
> draft-tran-midcom-dhcpv6-option-00.txt (and also -01 which is
> now posted but identical):
>
> - Abstract: "Dynamic Host Configuration Protocol for IPv6"
> would be better than "Dynamic Host Configuration Protocol version 6".
>
> - 1 Terminology: MIDCOM should be Midcom to be consistent
> with usage throughout doc? Functionnality should be
> functionality. There's also a bunch of non 7-bit ASCII
> characters in the "Midcom Agent" definition?
>
> - 2 Introduction: "the domain name[s] of the Midcom". And,
> also "or the domain name[s] of Midcom middleboxes". (Make plural!)
>
> - 4 Midcom Middlebox DHCPv6 Option - "list of [] 128-bit []
> IPv6 addresses or, preferably, [a] DNS [RFC1035] domain name[s]."
>
> - 4.2 Midcom Middlebox IPv4 Address List - should be "IPv6", not IPv4.
>
> - Table 1 (in Section 5.2): There is a MUST, but this is only
> if there is an address configured.
>
> - 5.2 Midcom Middlebox DHCPv6 Server Option Operation: "This
> server MAY send one" ... Is use of "MAY" correct here? I
> think it should be "This server should send ..."? The table
> provides the rules.
>
> I haven't looked at draft-tran-midcom-dhcp-option-01.txt
> (DHCPv4 option)
> - but some of the above nits likely apply there as well.
>
>
> I don't see anything particularily wrong with these DHCPv6
> options, though as I posted the other day, I think the DHC WG
> should take on the issue as to whether this is the best way
> to handle the ability to configure addresses and domain names
> (two options), or whether, as Ted suggested in a response to
> my post, to send only addresses.
>
> I guess a good question to Joel and Soumaya is whether just
> sending addresses would cause any significant issues?
>
> - Bernie Volz
>
>
> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On
> Behalf Of Ralph Droms
> Sent: Wednesday, March 31, 2004 1:24 PM
> To: dhcwg@ietf.org
> Cc: margaret@thingmagic.com; narten@us.ibm.com; Melinda Shore
> Subject: [dhcwg] Internet Drafts to be reviewed by the dhc WG
>
>
> There are a couple of Internet Drafts under review by the
> midcom WG that specify new DHCP options:
>
> draft-tran-midcom-dhcp-option-00.txt
> draft-tran-midcom-dhcpv6-option-00.txt
>
> Based on our current charter, the dhc WG should consider
> collaborating with the midcom WG on the review of these
> specifications; specifically, the dhc WG should review the
> syntax of the options for adherence to DHCP requirements and
> consistency with other DHCP options, while the midcom WG will
> review the semantics associated with the options.
>
> Is there any objection to taking on this review as a dhc WG
> work item, pending acceptance of the documents by the midcom
> WG?  Note that the drafts themselves will appear as midcom WG
> documents (if taken on by the midcom WG).
>
> - Ralph
>
>
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
>
>
>



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From dhcwg-admin@ietf.org  Mon Apr  5 16:08:32 2004
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Subject: RE : [dhcwg] Internet Drafts to be reviewed by the dhc WG
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When I wrote the document, my intention was not to make a debate nor promote
whatever there will be IPv6 NAT. As Tim suggested, I will change on the next
version the text concerning the NAT in order to avoid all "suggestions"
possible.

...J

> -----Message d'origine-----
> De : dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] De la
> part de Tim Chown
> Envoyé : 5 avril, 2004 11:10
> À : Martin Stiemerling
> Cc : Ralph Droms; dhcwg@ietf.org; margaret@thingmagic.com;
> narten@us.ibm.com; Melinda Shore
> Objet : Re: [dhcwg] Internet Drafts to be reviewed by the dhc WG
>
>
> On Mon, Apr 05, 2004 at 03:54:57PM +0200, Martin Stiemerling wrote:
> >
> > Hmm, I don't see any assumption saying that there will be
> IPv6 NATs.
> > The
> > document ist just saying that the MIDCOM server can be
> reached via IPv6,
> > whether there is a NAT at the box or not is a different story.
>
> Taken from the intro draft-tran-midcom-dhcpv6-option-01:
>
>   "Entities using the Midcom Protocol need to know the
>    presence of Midcom middleboxes, such as firewalls and
> network address
>    translators, in order to enable communication across
> theses devices.
>    A DHCPv6 option provides a means for these entities to
> determine the
>    Midcom middleboxes IPv6 address or the domain name."
>
> But that text is cut and paste from the IPv4 version of the
> draft. Perhaps the v6 version can omit mention of
> translators? (If people use it for that, so be it, but we're
> not then "suggesting" it...)
>
> Tim
>
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
>
>



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From dhcwg-admin@ietf.org  Mon Apr  5 16:54:36 2004
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From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] Computation of T1, T2, and lease expiration time
Date: Mon, 5 Apr 2004 15:06:53 -0500
To: "Kevin A. Noll" <kevin.noll@perfectorder.com>
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On Apr 5, 2004, at 2:00 PM, Kevin A. Noll wrote:
> In a not so perfect world, the latter would make sense. For
> example, if the network or DHCP server is not performing very
> well, it may take many seconds and several retries to actually
> get from DISCOVER to ACK. If this happens and the DISCOVER time
> is the reference, then there could be a considerable discrepency
> between the client's and server's notion of when the lease
> should expire.

Speaking in terms of what the RFC says, it says that the client should 
assume that the lease is computed from the time it sent the first 
DHCPDISCOVER.   So if the T1 or T2 time, plus the time that the first 
DHCPDISCOVER was sent, is less than the current time, then you do 
indeed have a problem.   However, if you are running such short leases 
that this becomes a real issue, you will probably have lots of 
problems, and this will be the least of them.

Practically speaking, I am not aware of any DHCP servers that do not 
compute the T1 and T2 times and the actual lease expiry time relative 
to the time when they generate the last DHCPACK they send to the 
client.   But I wouldn't write a client that makes this assumption.



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From dhcwg-admin@ietf.org  Mon Apr  5 17:21:29 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Kevin A. Noll'" <kevin.noll@perfectorder.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] Computation of T1, T2, and lease expiration time
Date: Mon, 5 Apr 2004 16:48:51 -0400
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I think the text you refer to is:

   The client records the lease expiration time as the sum of
   the time at which the original request was sent and the duration of
   the lease from the DHCPACK message.

And, the question is what does "original request" refer to - the
DISCOVER or REQUEST?

To be completely safe, using the DISCOVER would be best (since that will
result in the shortest lease / T1 / T2 times for the client). But, I
think practially speaking that REQUEST is OK.

But, any client and server need to be prepared for some grace period for
leases as there is no requirement that the client and server have
synchronized clocks and their individual clocks may run fast or slow.

Perhaps this would be item to include in a future revision of
draft-ietf-dhc-implementation-01.txt?

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Kevin A. Noll
Sent: Monday, April 05, 2004 3:01 PM
To: dhcwg@ietf.org
Subject: [dhcwg] Computation of T1, T2, and lease expiration time



Paragraph 2 of Section 4.4.1 of RFC2131 implies that T1, 
T2, and the lease expiration time are all computed relative 
to the time that the client sends the DHCPDISCOVER.

Is this correct, or should these values be computed relative 
to the time that the client acquires the lease (i.e. when it receives
the DHCPACK)?

In a perfect world, the former would make sense because the time to get
from DISCOVER to ACK should be just a couple of 
seconds at most. 

In a not so perfect world, the latter would make sense. For example, if
the network or DHCP server is not performing very well, it may take many
seconds and several retries to actually get from DISCOVER to ACK. If
this happens and the DISCOVER time 
is the reference, then there could be a considerable discrepency 
between the client's and server's notion of when the lease 
should expire.

Am I correct, or did I miss another section of the document that
clarifies this?

--kan--
--
Kevin A. Noll, KD4WOZ
CCIE 10948, CCDP
Perfect Order, Inc.		
Kevin.Noll@perfectorder.com
717-796-1936


_______________________________________________
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https://www1.ietf.org/mailman/listinfo/dhcwg


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From dhcwg-admin@ietf.org  Mon Apr  5 17:46:28 2004
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Date: Mon, 05 Apr 2004 16:59:15 -0400
From: "Kevin A. Noll" <kevin.noll@perfectorder.com>
Subject: RE: [dhcwg] Computation of T1, T2, and lease expiration time
In-reply-to: <004501c41b4f$67260dd0$d0412ca1@amer.cisco.com>
To: Bernie Volz <volz@cisco.com>, dhcwg@ietf.org
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As usual, I missed that section of text.

Actually, I was referring to this sentence in paragraph two:

	The client records its own local time for later use in 
	computing the lease expiration.  The client then broadcasts 
	the DHCPDISCOVER...

If you consider both of these paragraphs, it appears that the
timers should be calculated from the DHCPDISCOVER.

I would be in favor of including this for clarification in 
a future version of draft-ietf-dhc-implementation-01.txt.

--kan--

> -----Original Message-----
> From: Bernie Volz [mailto:volz@cisco.com]
> Sent: Monday, 05 April, 2004 4:49 PM
> To: 'Kevin A. Noll'; dhcwg@ietf.org
> Subject: RE: [dhcwg] Computation of T1, T2, and lease expiration time
> 
> 
> I think the text you refer to is:
> 
>    The client records the lease expiration time as the sum of
>    the time at which the original request was sent and the duration of
>    the lease from the DHCPACK message.
> 
> And, the question is what does "original request" refer to - the
> DISCOVER or REQUEST?
> 
> To be completely safe, using the DISCOVER would be best (since that will
> result in the shortest lease / T1 / T2 times for the client). But, I
> think practially speaking that REQUEST is OK.
> 
> But, any client and server need to be prepared for some grace period for
> leases as there is no requirement that the client and server have
> synchronized clocks and their individual clocks may run fast or slow.
> 
> Perhaps this would be item to include in a future revision of
> draft-ietf-dhc-implementation-01.txt?
> 
> - Bernie
> 
> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
> Kevin A. Noll
> Sent: Monday, April 05, 2004 3:01 PM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Computation of T1, T2, and lease expiration time
> 
> 
> 
> Paragraph 2 of Section 4.4.1 of RFC2131 implies that T1, 
> T2, and the lease expiration time are all computed relative 
> to the time that the client sends the DHCPDISCOVER.
> 
> Is this correct, or should these values be computed relative 
> to the time that the client acquires the lease (i.e. when it receives
> the DHCPACK)?
> 
> In a perfect world, the former would make sense because the time to get
> from DISCOVER to ACK should be just a couple of 
> seconds at most. 
> 
> In a not so perfect world, the latter would make sense. For example, if
> the network or DHCP server is not performing very well, it may take many
> seconds and several retries to actually get from DISCOVER to ACK. If
> this happens and the DISCOVER time 
> is the reference, then there could be a considerable discrepency 
> between the client's and server's notion of when the lease 
> should expire.
> 
> Am I correct, or did I miss another section of the document that
> clarifies this?
> 
> --kan--
> --
> Kevin A. Noll, KD4WOZ
> CCIE 10948, CCDP
> Perfect Order, Inc.		
> Kevin.Noll@perfectorder.com
> 717-796-1936
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 
> 

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Date: Tue, 06 Apr 2004 10:54:54 +0200
From: Martin Stiemerling <stiemerling@netlab.nec.de>
To: Tim Chown <tjc@ecs.soton.ac.uk>
Cc: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org, margaret@thingmagic.com,
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Subject: Re: [dhcwg] Internet Drafts to be reviewed by the dhc WG
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Hi Tim,

--On Montag, 5. April 2004 16:10 Uhr +0100 Tim Chown <tjc@ecs.soton.ac.uk> 
wrote:

| On Mon, Apr 05, 2004 at 03:54:57PM +0200, Martin Stiemerling wrote:
|>
|> Hmm, I don't see any assumption saying that there will be IPv6 NATs. The
|> document ist just saying that the MIDCOM server can be reached via IPv6,
|> whether there is a NAT at the box or not is a different story.
|
| Taken from the intro draft-tran-midcom-dhcpv6-option-01:
|
|   "Entities using the Midcom Protocol need to know the
|    presence of Midcom middleboxes, such as firewalls and network address
|    translators, in order to enable communication across theses devices.
|    A DHCPv6 option provides a means for these entities to determine the
|    Midcom middleboxes IPv6 address or the domain name."
|
| But that text is cut and paste from the IPv4 version of the draft.
| Perhaps the v6 version can omit mention of translators? (If people use
| it for that, so be it, but we're not then "suggesting" it...)

The text gives the freedom to read it different ways. As a MIDCOM guy I do 
read it as "the configuration protocol's endpoint address might be IPv6 
capable, but not the middlebox engine (=firewall and/or NAT)".
But indeed I see the point of given a more elaborated text.

  Martin


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On Tue, Apr 06, 2004 at 10:54:54AM +0200, Martin Stiemerling wrote:
> |
> |   "Entities using the Midcom Protocol need to know the
> |    presence of Midcom middleboxes, such as firewalls and network address
> |    translators, in order to enable communication across theses devices.
> |    A DHCPv6 option provides a means for these entities to determine the
> |    Midcom middleboxes IPv6 address or the domain name."
> |
> | But that text is cut and paste from the IPv4 version of the draft.
> | Perhaps the v6 version can omit mention of translators? (If people use
> | it for that, so be it, but we're not then "suggesting" it...)
> 
> The text gives the freedom to read it different ways. As a MIDCOM guy I do 
> read it as "the configuration protocol's endpoint address might be IPv6 
> capable, but not the middlebox engine (=firewall and/or NAT)".
> But indeed I see the point of given a more elaborated text.

I guess you're too close to the protocol to read it without assumptions :)

"Midcom middleboxes, such as firewalls and network address translators"
then
"Midcom middleboxes IPv6 address"
implies IPv6 NAT...

Just take the NAT reference out for the IPv6 option?

Tim

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Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-3315id-for-v4-02.txt + LAST CALL Comments
Date: Tue, 6 Apr 2004 09:39:44 -0400
Organization: Cisco
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Barr:

I don't think a new option is such a good idea. If a new option is used,
how does a client know when to send it or the 'old' client identifier
option? This forces 'new' clients to send both - at least in the
DISCOVER (older servers would not echo back the new option in the OFFER
and new servers would could send back just the new option). This goes
against your proposed text for 4.1, "but MUST NOT send both."

Barr, Ted & Bill:

I'm also not completely happy with encoding the IAID and DUID in a
single option.

The main reason I don't like this is that it forces the server to do
something that we don't really want it to do - pull apart the data in
the client identifier option - the option data is no longer 'opaque'.
Note that it will be important for the DHCP server to do this for:
1. Dynamic DNS updates since the client identifier is only the DUID
portion (see section 3.3 of draft-ietf-dnsext-dhcid-rr-07.txt).
2. Client based policies (ie, reservations) or limits, since these will
want to look just at the DUID portion.

But, there is an advantage to encoding the IAID and DUID in the option
as it supports current DHCP server implementations. Without this, a
client that has multiple interfaces (either connected to the same link
or not) that are serviced by a single DHCP server might not get multiple
addresses.

I guess given the lessor of the two evils, I'm inclined to go along with
the option as you've proposed it in the draft.

So, I support this document moving forward.

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Richard Barr Hibbs
Sent: Monday, March 15, 2004 6:10 PM
To: Dhcwg
Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-3315id-for-v4-02.txt



Ted and Bill--

the proposal to modify the definition of DHCP(v4) 'client identifiers'
to be compatible with RFC3315 'DHCP Unique Identifiers' (DUIDs)
represents a good approach to solving some of our long-standing issues
about the identification and recognition of DHCP(v4) clients, especially
in an environment where transition between DHCPv4 and DHCPv6 is planned.

I disagree on a number of points, which I'd like to present here.

First, a DHCPv6 DUID is intended to be globally unique,
while a DHCPv4 'client identifier' is not [from section 9
of RFC3315:  "The motivation for having more than one type
of DUID is that the DUID must be globally unique, and must
also be easy to generate."]

A second problem that you point out in section 4.2 of the
draft is, "... some DHCPv4 servers can be configured not to conform to
RFC2131 and RFC2131 [sic], in the sense that they ignore the 'client
identifier' option and use the client's hardware address instead.  A
clarification of the RFCs seems in order.

I posit another problem that arises from the current
definition of 'client identifier.'  RFC2132 _suggests_ a
method for generating an appropriately [subnet-] unique identifier, but
several known implementations treat RFC2132's "MAY" as "MUST" and
"SHOULD" as "MAY." [from section 9.14 of RFC2132, "Identifiers SHOULD be
treated as opaque objects by DHCP servers. The client identifier MAY
consist of type-value pairs similar to the 'htype'/'chaddr' fields...."]

Finally, during our conference calls discussing the RFC2131
implementation issues we reached a rough consensus about the DHCPv4
client identifier, including the following points:

 1. the 'client identifier' is an opaque octet string [not
    null terminated] from which a DHCPv4 server SHOULD NOT
    infer or expect any structure.
 2. all description of how a 'client identifier' MAY be
    generated by a DHCPv4 client will be removed from
    RFC2131 and contained ONLY in RFC2132.
 3. description of alternative methods for generating a
    subnet-unique 'client identifier' will be included in
    RFC2132.
 4. the wording of both RFCs would be carefully checked to
    ensure that both are completely consistent describing
    the generation and use of 'client identifiers' and that
    any wording changes will not alter our consensus on the
    use of 'client identifier' to recognize and identify a
    DHCPv4 client.

So, my proposal for this draft is that it should define a
NEW DHCPv4 option, to be used IN PLACE OF 'client
identifier' option 61 where interoperability with DHCPv6 is required or
anticipated.

Separately, we would update RFC2131 and RFC2132 according to the
consensus we reached earlier.

With this in mind, I offer the following edits to your
draft (proposed changes marked by quotation marks):

Abstract

This document "specifies a new option" for encoding DHCPv4 [RFC2131 and
RFC2132] client identifiers, so that those identifiers will be
interchangeable with identifiers used in the DHCPv6 protocol [RFC3315].

Introduction

This document specifies the way in which DHCPv4 clients
should identify themselves "when operated in an environment that
includes or is anticipated to include DHCPv6 clients, such as during a
transition from DHCPv4 to DHCPv6."  DHCPv4 client implementations that
conform to this specification use a DHCPv6-style DHCP Unique Identifier
(DUID) "in a new DHCPv4 option."  This "updates" the behaviour specified
in RFC2131 and RFC2132.

2.4. RFC2131 does not require the use of a client identifier

RFC2131 allows the DHCP server to identify clients either
by using the client identifier option sent by the client,
or, if the client did not send one, the client's link-layer
address.   Like the client identifier format "suggested" by
RFC2131, this suffers from the problems previously described
in "sections 2.2 and 2.3."

3. Solutions

The solution to problem (2.4) is to deprecate the use of the contents of
the 'chaddr' field in the DHCP packet as a means of identifying the
client.  "For backwards compatibility in a DHCPv4-only environment, this
behavior must remain as a default, whose use is strongly discouraged."

4.1. DHCP Client behavior

DHCP clients conforming to this specification MUST use
stable DHCP node identifiers in the "new DHCP unique identifier" option.
DHCP clients MUST NOT use "DHCP unique" identifiers based solely on
layer two addresses that are hard-wired to the layer two device (e.g.,
the ethernet MAC
address) as suggested in RFC2131 "and RFC2132 for 'client identifiers'",
except as allowed in section 9.2 of RFC3315. DHCP clients MUST send a
'"DHCP unique" identifier' "option if interoperation with DHCPv6 clients
and servers is anticipated, or MAY send a 'client identifier' option if
interoperation is not anticipated, but MUST NOT send both."

"If the DHCPv4 client sends a 'DHCP unique identifier'
option it MUST be composed of" an Identity Association
Unique Identifier, as defined in section 10 of RFC3315, and
a DHCP Unique Identifier, as defined in section 9 of
RFC3315.  These together constitute an RFC3315-style binding identifier.

The general format of the DHCPv4 'client identifier' option
is defined in section 9.14 of RFC2132, "and remains
unchanged by this proposal."

The format of the proposed '"DHCP unique" identifier'
option is as follows:

   Code   Len  /----- IAID ------\ /------ DUID ------- ...
   +-----+----+----+----+----+----+----+----+----+----+----
   | TBD |  n | i1 | i2 | i3 | i4 | d1 | d2 | d3 | d4 | ...
   +-----+----+----+----+----+----+----+----+----+----+----
  octets 1    2    3    4    5    6    7    8    9   10 ...

Any DHCPv4 or DHCPv6 client that conforms to this
specification SHOULD provide a means by which an operator
can learn what DUID the client has chosen.  Such clients
SHOULD also provide a means by which the operator can
configure the DUID.  A device that is normally configured
with both a DHCPv4 and DHCPv6 client SHOULD automatically
use the same DUID for DHCPv4 and DHCPv6 without any operator
intervention.  DHCP clients that support more than one network interface
SHOULD use the same DUID on every interface.  DHCP clients that support
more than one network interface SHOULD use a different IAID on each
interface.

4.3. Changes from RFC2131

In section 2 of RFC2131, on page 9, the text that reads,
"for example, the 'client identifier' may contain a
hardware address, identical to the contents of the
'chaddr' field, or it may contain another type of
identifier, such as a DNS name" is deleted.  [rbh--this is probably what
the RFC2131 implementation issues draft will eventually propose]

In section 4.2 of RFC2131, the text "The client MAY choose
to explicitly provide the identifier through the 'client identifier'
option.  If the client supplies a 'client identifier', the client MUST
use the same 'client identifier' in all subsequent messages, and the
server MUST use that identifier to identify the client.  If the client
does not provide a 'client identifier' option, the server MUST use the
contents of the 'chaddr' field to identify the client" is replaced by
the text, "The client MUST explicitly provide a client identifier
through the 'client identifier' option."  [rbh--while I agree this is
desirable, I think that MUST ought to be SHOULD to allow existing
implementations to remain conformant to RFC2131, and because I'm
proposing that we create a new option, the wording should reflect this]

In the same section, the text "Use of 'chaddr' as the
client's unique identifier may cause unexpected results, as that
identifier may be associated with a hardware interface that could be
moved to a new client.  Some sites may choose to use a manufacturer's
serial number as the 'client identifier', to avoid unexpected changes in
a clients network address due to transfer of hardware interfaces among
computers.  Sites may also choose to use a DNS name as the 'client
identifier', causing address leases to be associated with the DNS name
rather than a specific hardware box." is replaced by the text "The DHCP
client MUST NOT rely on the 'chaddr' field to identify it."  [rbh--I'd
like to see the word "uniquely" inserted here: "... field to uniquely
identify it."]

In section 4.4.1 of RFC2131, the text "The client MAY
include a different unique identifier" is replaced with "The client MUST
include a unique identifier".  [rbh--again, although I agree this is
most desirable, I think SHOULD is appropriate for backwards
compatibility]

In sections 3.1, item 4 and 6, 3.2 item 3 and 4, and 4.3.1, where
RFC2131 says that 'chaddr' may be used instead of the 'client
identifier' option, the text that says "or 'chaddr'" and "'chaddr' or"
is deleted.  [rbh--wording should favor use of 'DUID' option (proposed
by this memo, but permits 'client identifier' option]

Note that these changes do not relieve the DHCP server of
the obligation to use 'chaddr' as an identifier if the
client does not send a 'client identifier' option.  Rather, they oblige
clients that conform with this document to send a "'DHCP unique
identifier' option (preferred) or a 'client identifier' option, and not
rely on 'chaddr' for identification.  DHCP servers MUST use 'chaddr' as
an identifier in cases where "'DHCP unique identifier' or" 'client
identifier' is not sent, in order to support old clients that do not
conform with this document.

4.4. Changes from RFC2132

The text in section 9.14, beginning with "The client
identifier MAY consist of" through "that meet this
requirement for uniqueness." is replaced with "the client identifier
consists of a type field whose value is normally 255, followed by a
two-byte type field, followed by the contents of the identifier.  The
two-byte type field and the format of the contents of the identifier are
defined in RF3315,section 9."  The text "its minimum length is 2" in
the following paragraph is deleted.	 [rbh--the
implementation issues group will hopefully soon decide on a
new definition for option 61, so I'd suggest leaving this
text alone for the moment]

--Barr


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From dhcwg-admin@ietf.org  Tue Apr  6 21:59:30 2004
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Subject: [dhcwg] draft-ietf-dhc-leasequery-07.txt
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The IESG is reviewing draft-ietf-dhc-leasequery-07.txt and there are several
"discuss" issues that have been raised by IESG members.  The full text of
these issues is available at
https://datatracker.ietf.org/public/pidtracker.cgi?command=print_ballot&ballot_id=1185&filename=draft-ietf-dhc-leasequery

It is appropriate for the discussion about these issues to appear on the WG
mailing list and I encourage WG members to participate in the discussion.  I
will post initial messages about each of these issues (as there is some
overlap, I will group a couple of issues together into a single thread) to
the dhcwg mailing list.  Please review the issues and contribute to the
discussion...

- Ralph


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Subject: [dhcwg] Security for leasequery messages
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The following issues relate to security for leasequery messages:

Steve Bellovin:

Discuss:
(26 March 2004)
The Security Considerations section says this:

    DHCP servers SHOULD prevent exposure of location information
    (particularly the mapping of hardware address to IP address lease,
    which can be an invasion of broadband subscriber privacy) by
    employing some form of relay agent authentication between the
    DHCPLEASEQUERY client and the DHCP server.

    Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
    path to the DHCP server is secure.  Clients SHOULD use Relay Agent
    Information security as a way to achieve this goal.

What is "some form of ... authentication"?  What is "Relay Agent Information
security"?  Put another way, what is mandatory to implement?

Russ Housley:

Discuss:
   Section 7 says:
   >
   > DHCP servers SHOULD prevent exposure of location information
   > (particularly the mapping of hardware address to IP address lease,
   > which can be an invasion of broadband subscriber privacy) by
   > employing some form of relay agent authentication between the
   > DHCPLEASEQUERY client and the DHCP server.
   >
   There needs to be more discussion of the authentication requirements.
   I would prefer the specification to name a mandatory-to-implement
   mechanism, but that may be asking too much.

   Section 7 also says:
   >
   > Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
   > path to the DHCP server is secure.
   >
   What security services are needed?  Integrity, authentication, access
   control, replay protection confidentiality?  The hint about Relay Agent
   Information security, with no reference, is not sufficient.



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Thomas Narten:

Discuss:
I wonder if the following is a possible protocol issue:

Assume a client is connected to access concentrator A, and obtains a
lease. Client moves to concentrator B, and obtains a second lease. B
looses state, and issues lease query. Server will return two
addresses. How does B know which addresses (and location info) applies
to it (i.e, B) rather than A? Is there info in the protocol messages
that allows B to determine which address is its? E.g., does the
relay-agent info include such an identification in it?


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From dhcwg-admin@ietf.org  Tue Apr  6 22:21:13 2004
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Harald Alvestrand:

Comment:
Reviewed by Lucy Lynch, Gen-ART

Summary of review:

This draft is very clearly written, and well organized. My only question
has to do with "other  processes and devices" (not a show stooper).
The abstract states that "Other  processes and devices, many that already
send and receive DHCP format packets, sometimes need to access this
information". Much of the draft is focused on "access concentrator"s
(see for example section 5), a list of those other potenial uses might be
helpful. I also notice a number of lower case shoulds & musts in this
section which may actually be 2119 keywords and should be reviewed in that
light.


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From dhcwg-admin@ietf.org  Tue Apr  6 22:21:13 2004
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Thomas Narten:

Discuss:

Make it absolutely clear what a server must implement (in terms of the
options it must store), especially in the case of options that already
exist, but that a server may not be required to store. E.g, what is
required for this spec that is different from normal DHC. relay agent
option, client identifier (??).

Specific comments:

 >       o Query by IP address:
 >
 >         For this query, the requester supplies only an IP address in the
 >         DHCPLEASEQUERY message.  The DHCP server will return any
 >         information that it has on the most recent client to have been
 >         assigned that IP address.

make clear what info must be echoed back, esp. relay agent option,
since there is no requirement in existing DHC that a server store
it...


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From dhcwg-admin@ietf.org  Tue Apr  6 22:21:29 2004
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Thomas Narten:

Specific comments:

 >         For this query, the requester supplies only a MAC address in the
 >         DHCPLEASEQUERY message.  The DHCP server will return any
 >         information that it has on the IP address most recently accessed
 >         by a client with that MAC address.  In addition, it may supply
 >         addition IP addresses which have been associated with that MAC
 >         address in different subnets.  Information about these bindings
 >         can then be found using the Query by IP Address, described
 >         above.

may or does above? (multiple occurrences) Seems like this should be a
MUST (in order for good interoperability/correctness). I.e., if only
one address is returned (when there are several) it might be  the
wrong address and incorrect behavior may result.

 >    Any DHCP server which supports the DHCPLEASEQUERY message should save
 >    the information from the most recent Relay Agent Information option
 >    (option 82) [RFC 3046] associated with every IP address which it
 >    serves. It is assumed that most clients which generate the

seems like should -> MUST.

 >    A server which implements DHCPLEASEQUERY should also save the
 >    information on the most recent Vendor class identifier, option 60,
 >    associated with each IP address, since this option is also a likely
 >    candidate to be requested by clients sending the DHCPLEASEQUERY
 >    message.

Why? How is this info useful to the relay agent? Also, for
interoperabilty, SHOULD->MUST??

 >          client-last-transaction-time

is this really critical? How is it used? Document doesn't say.

 >       o DHCPLEASEUNASSIGNED
 >
 >         The server MUST respond with a DHCPLEASEUNASSIGNED message if
 >         this server has information about the IP address, but there is
 >         no active lease for the IP address.  The DHCPLEASEUNASSIGNED
 >         message is only returned for a query by IP address, and
 >         indicates that the server manages this IP address but there is
 >         no currently active lease on this IP address.

Are any DHC options returned? I'd assume no, but it would be good to
say that explicitely.

 >    If the "ciaddr" field is zero in a DHCPLEASEQUERY message, then the
 >    IP address placed in the "ciaddr" field of a DHCPLEASEACTIVE message
 >    MUST be that of an IP address for which the client that most recently
 >    used the IP address matches the Client-identifier or MAC address
 >    specified in the DHCPLEASEQUERY message.

wording: not "must recently used" but the one who currently owns the
lease. Right?

 >    In the case where more than one IP address has been accessed by the
 >    client specified by the MAC address or Client-identifier option, then
 >    the DHCP server MUST return the IP address returned to the client in
 >    the most recent transaction with the client unless the DHCP server
 >    has been configured by the server administrator to use some other
 >    preference mechanism.

Shouldn't it return _all_ the addresses? Above reads like only one
address needs to be returned.

 >    If the Client-identifier option (option 61) is specified in the
 >    Parameter Request List option (option 55), then the Client-identifier
 >    (if any) of the client associated with the IP address in the "ciaddr"
 >    field SHOULD be returned in the DHCPLEASEACTIVE message.

Does a server already normally store the client identifier option?
I.e., is this required already?

 >    In the case where more than one IP address has been involved in a
 >    DHCP message exchange with the client specified by the MAC address
 >    and/or Client-identifier option, then the list of all of the IP
 >    addresses SHOULD be returned in the associated-ip option (option
 >    TBD), if that option was requested as part of the Parameter Request
 >    List option.

Seems potentially problematic for a client to ask for just one, and
get only one, if there are many.  It might get back the wrong one and
do the wrong thing.


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Subject: Re: [dhcwg] dhc WG last call on draft-ietf-dhc-proxyserver-opt-00
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I have a bunch of suggested changes to this draft, which fall into 
three categories:

1. A single change to the protocol itself.
2. Editorial changes - I think there was some extra text in this draft 
explaining proxy servers that isn't needed, and generate questions 
during the IESG review, so I'm suggesting that it be deleted.
3. Copyediting.   There were some minor spelling and grammatical errors.

The change to the protocol is that it currently specifies an 
encapsulation of suboptions, like option 82, but allows for the 
appearance of multiple suboptions, which is different than the behavior 
specified for handling options in RFC3396.   This is not a huge 
problem, but it probably requires additional code in DHCP servers and 
clients that isn't necessary, so I'd suggest changing it so that if you 
want to specify multiple proxy servers for the same protocol, you 
should just list more than one IP address/port tuple in the suboption 
for that protocol.

I've enclosed a diff for all the changes.


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***=20draft-ietf-dhc-proxyserver-opt-00.txt.orig=09Wed=20Apr=20=207=20=
11:53:23=202004=0A---=20draft-ietf-dhc-proxyserver-opt-00.txt=09Wed=20=
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network.=0A---=2081,101=20----=0A=20=201.=20Terminologies=20Used=0A=20=20=
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From dhcwg-admin@ietf.org  Wed Apr  7 20:39:35 2004
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Date: Wed, 07 Apr 2004 17:00:03 -0400
To: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org
From: Kim Kinnear <kkinnear@cisco.com>
Subject: Re: [dhcwg] Other comments on the leasequery spec
Cc: kkinnear@cisco.com
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At 08:53 PM 4/6/2004, Ralph Droms wrote:
>Thomas Narten:
>
>Specific comments:
>
>>         For this query, the requester supplies only a MAC address in the
>>         DHCPLEASEQUERY message.  The DHCP server will return any
>>         information that it has on the IP address most recently accessed
>>         by a client with that MAC address.  In addition, it may supply
>>         addition IP addresses which have been associated with that MAC
>>         address in different subnets.  Information about these bindings
>>         can then be found using the Query by IP Address, described
>>         above.
>
>may or does above? (multiple occurrences) Seems like this should be a
>MUST (in order for good interoperability/correctness). I.e., if only
>one address is returned (when there are several) it might be  the
>wrong address and incorrect behavior may result.

        Yes, it MUST supply them if any exist, so the client
        "may" or "may not" see any, depending on whether they
        exist.  We'll fix this.



>>    Any DHCP server which supports the DHCPLEASEQUERY message should save
>>    the information from the most recent Relay Agent Information option
>>    (option 82) [RFC 3046] associated with every IP address which it
>>    serves. It is assumed that most clients which generate the
>
>seems like should -> MUST.

        Sure.  Except that you said that section 5 couldn't have
        SHOULD or MUST's in it, since it is the overview.


>>    A server which implements DHCPLEASEQUERY should also save the
>>    information on the most recent Vendor class identifier, option 60,
>>    associated with each IP address, since this option is also a likely
>>    candidate to be requested by clients sending the DHCPLEASEQUERY
>>    message.
>
>Why? How is this info useful to the relay agent? 

        Some devices (notably DOCSIS) encode lots of stuff in the
        vendor-class-id.

>Also, for
>interoperabilty, SHOULD->MUST??

        Sure, but again, we either need to rescind the
        prohibition on RFC 2119 keywords in the overview, or just
        make sure that we do this properly elsewhere (or both, of
        course).


>>          client-last-transaction-time
>
>is this really critical? How is it used? Document doesn't say.

        That certainly slipped through the cracks.  The
        client-last-transaction time is what is used to decide
        the "latest" and therefore most important IP address to
        return in the ciaddr when the query is by MAC address or
        client-identifier.  It is also used to order the list of
        other IP addresses, returned in the associated-ip option.

        We'll make sure that we add that somewhere.


>>       o DHCPLEASEUNASSIGNED
>>
>>         The server MUST respond with a DHCPLEASEUNASSIGNED message if
>>         this server has information about the IP address, but there is
>>         no active lease for the IP address.  The DHCPLEASEUNASSIGNED
>>         message is only returned for a query by IP address, and
>>         indicates that the server manages this IP address but there is
>>         no currently active lease on this IP address.
>
>Are any DHC options returned? I'd assume no, but it would be good to
>say that explicitely.

        I agree with your assumption.  We can certainly say that
        explicitly.


>>    If the "ciaddr" field is zero in a DHCPLEASEQUERY message, then the
>>    IP address placed in the "ciaddr" field of a DHCPLEASEACTIVE message
>>    MUST be that of an IP address for which the client that most recently
>>    used the IP address matches the Client-identifier or MAC address
>>    specified in the DHCPLEASEQUERY message.
>
>wording: not "must recently used" but the one who currently owns the
>lease. Right?

        Yes.


>>    In the case where more than one IP address has been accessed by the
>>    client specified by the MAC address or Client-identifier option, then
>>    the DHCP server MUST return the IP address returned to the client in
>>    the most recent transaction with the client unless the DHCP server
>>    has been configured by the server administrator to use some other
>>    preference mechanism.
>
>Shouldn't it return _all_ the addresses? Above reads like only one
>address needs to be returned.

        It returns the IP address associated with this client
        that was most recently accessed by this client.  It
        returns this one and all of the others in the
        associated-ip option.  We can make that more clear.


>>    If the Client-identifier option (option 61) is specified in the
>>    Parameter Request List option (option 55), then the Client-identifier
>>    (if any) of the client associated with the IP address in the "ciaddr"
>>    field SHOULD be returned in the DHCPLEASEACTIVE message.
>
>Does a server already normally store the client identifier option?
>I.e., is this required already?

        Yes.


>>    In the case where more than one IP address has been involved in a
>>    DHCP message exchange with the client specified by the MAC address
>>    and/or Client-identifier option, then the list of all of the IP
>>    addresses SHOULD be returned in the associated-ip option (option
>>    TBD), if that option was requested as part of the Parameter Request
>>    List option.
>
>Seems potentially problematic for a client to ask for just one, and
>get only one, if there are many.  It might get back the wrong one and
>do the wrong thing.

        What is the "wrong" one?  If it gets the one most
        recently accessed by the client, then that is only the
        wrong one if it wants something else.  If it wants
        something else, it should ask for all of them.  I guess I
        don't see the problem here.  If you want the most recent,
        then you don't have to ask for them all.  If you don't
        want the most recent, then you should ask for them all.

        Cheers -- Kim



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From dhcwg-admin@ietf.org  Wed Apr  7 21:20:44 2004
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Date: Wed, 07 Apr 2004 17:27:36 -0400
To: dhcwg@ietf.org
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] dhc WG last call on
  draft-ietf-dhc-proxyserver-opt-00
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One technical question: rather than allowing multiple instances of the same
suboption, would it be possible to allow multiple servers to be specified in
one instance of the suboption?  If so, the  number of proxy servers in the
suboption would be reflected in the suboption length field, which would be
6*number-of-servers.

I also have some editorial suggestions...

The document should be revised to reflect the new boilerplate in RFC 3667.

Use "suboption" throughout the document.

I don't think HTTP, FTP, SSL, etc. need to appear in the Terminologies
section.  Those definitions could be replaced with references to the
relevant RFCs in the body of the document.

Section 2, first paragraph; replace "does not include Proxy(HTTP, FTP, NNTP,
Gopher etc.)server configuration to be used" with "does not include a list
of proxy servers for HTTP, FTP, NNTP, Gopher and other protocols to be used".

Section 2, second paragraph: replace "Following Figure, depicts..." with
"The following figure depicts..."

Section 2, third paragraph: replace "special software typically runs on
firewall machine" with "process that typically runs on a firewall"

Section 2, fourth paragraph: replace "Proxy server" with "A proxy server".

Section 4, second paragraph: replace "Code is TBD as per RFC-2939" with
"Code is TBD and will be assigned by IANA according to RFC 2939"

Section 4, fourth paragraph: the end of the last sentence should be modified
to allow for new protocol numbers to be defined in the future.

Section 4, fifth paragraph: should both the proxy server address and port
nubmer be in network byte order?

Sections 8 and higher should be renumbered (sections 6 and 7 are missing).



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Subject: [dhcwg] RFC 3736 on Stateless Dynamic Host Configuration Protocol (DHCP) Service for IPv6
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--NextPart


A new Request for Comments is now available in online RFC libraries.


        RFC 3736

        Title:      Stateless Dynamic Host Configuration Protocol
                    (DHCP) Service for IPv6
        Author(s):  R. Droms
        Status:     Standards Track
        Date:       April 2004
        Mailbox:    rdroms@cisco.com
        Pages:      9
        Characters: 18510
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-ietf-dhc-dhcpv6-stateless-04.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3736.txt


Stateless Dynamic Host Configuration Protocol service for IPv6
(DHCPv6) is used by nodes to obtain configuration information, such as
the addresses of DNS recursive name servers, that does not require the
maintenance of any dynamic state for individual clients.  A node that
uses stateless DHCP must have obtained its IPv6 addresses through some
other mechanism, typically stateless address autoconfiguration.  This
document explains which parts of RFC 3315 must be implemented in each
of the different kinds of DHCP agents so that agent can support
stateless DHCP.

This document is a product of the Dynamic Host Configuration Working
Group of the IETF.

This is now a Proposed Standard Protocol.

This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
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From dhcwg-admin@ietf.org  Thu Apr  8 15:58:39 2004
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Bert Wijnen:

Discuss:
- Have IPCDN and/or ADSLMIB WGs looked at this?
   Both CABLE and ADSL are used as typical examples of where
   this functionality would be used/needed. So I like to know
   what these WGs think of this. I see Rich Woundy as one of the authors,
   he is IPCDN co-chair, so possibly that aspect is OK.


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From dhcwg-admin@ietf.org  Thu Apr  8 15:58:39 2004
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Bert Wijnen:

Discuss:
- It seems to be implicitly IPv4 specific without explaining/justifying why
   and uses "IP address" to mean IPv4 addresses only. Do we not want them
   to either be IPv4/v6 agnostic or to be specific in stating that they
   are IPv4 only if such is the case and justified?


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From dhcwg-admin@ietf.org  Thu Apr  8 16:45:43 2004
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Subject: [dhcwg] Use of SNMP instead of leasequery
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Bert Wijnen:

Discuss:
- what is the status of this solution vs DHCP MIB solution (I thought
   they were competing solutions some time back).
   The DHC MIB has also been submitted for PS, no? I know it is still in
   MIB Doctor review... but it is a 2nd solution to same problem.
- The reasonings for not using SNMP and MIB seem very weak to me

Ted Hardie:

Discuss:

It's too bad that SNMP is off the table here, as that would give you a 
realistic
way to limit data to specific queries and queriers.


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From dhcwg-admin@ietf.org  Thu Apr  8 16:45:44 2004
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Ted Hardie:

Discuss:
This whole method has "invitation to mischief" printed in large, block 
letters across its
shirt.  After being told repeatedly that there is no restriction on the use 
cases for this
mechanism, this text:

         For this query, the requester supplies only an IP address in the
         DHCPLEASEQUERY message.  The DHCP server will return any
         information that it has on the most recent client to have been
         assigned that IP address.

sets off lots of alarm bells.  If I read this right, *any information* 
associated
with that IP address is returned?  If information used to construct a location
object is present (as in the geopriv dhcp-li draft), that would get returned?
That seems kind of excessive for an access concentrator, but very, very nice
for a black hat.  This whole section on Parameter Request List options:

         The Parameter Request List option (option 55) SHOULD be set to
         the options of interest to the requester.  The interesting
         options are likely to include the IP Address Lease Time option
         (option 51), the Relay Agent Information option (option 82) and
         possibly the Vendor class identifier option (option 60).  In the
         absence of a Parameter Request List option, the server SHOULD
         return the same options it would return for a DHCPREQUEST
         message which didn't contain a DHCPLEASEQUERY message, which
         includes those mandated by [RFC 2131, Section 4.3.1] as well as
         any options which the server was configured to always return to
         a client.

has no restrictions of any type on the return of any data.  Why is all
of this data being made available via this method?

It's too bad that SNMP is off the table here, as that would give you a 
realistic
way to limit data to specific queries and queriers.

Limiting the protocol to a very specific use that fits the
demonstrated need seems like it would make getting the security
mechanisms right easier; if this is meant to be truly general purpose,
it needs a general purpose mechanism that would give it the same level
of security as SNMP would for this same purpose.


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From dhcwg-admin@ietf.org  Thu Apr  8 18:08:36 2004
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> -----Original Message-----
> From: Bernie Volz [mailto:volz@cisco.com]
> Sent: Tuesday, 06 April 2004 06:40
>
> I don't think a new option is such a good idea.
> If a new option is used, how does a client know
> when to send it or the 'old' client identifier
> option? This forces 'new' clients to send both -
> at least in the DISCOVER (older servers would
> not echo back the new option in the OFFER
> and new servers would could send back just the
> new option). This goes against your proposed
> text for 4.1, "but MUST NOT send both."
>
...although I believe that when you significantly change
both the syntax and semantics of an existing option it
should be recast as a new option, I'll relent on that
point...  I also seem to have failed the transition test by
requiring divine knowledge on the part of clients...
oops....


> I'm also not completely happy with encoding the
> IAID and DUID in a single option.
>
> The main reason I don't like this is that it
> forces the server to do something that we don't
> really want it to do - pull apart the data in
> the client identifier option - the option data is
> no longer 'opaque'.  Note that it will be
> important for the DHCP server to do this for:
> 1. Dynamic DNS updates since the client
> identifier is only the DUID portion (see section
> 3.3 of draft-ietf-dnsext-dhcid-rr-07.txt).
> 2. Client based policies (ie, reservations) or
> limits, since these will want to look just at the
> DUID portion.
>
I strongly believe that the client identifier should remain
opaque to the server because to change the semantics is a
significant change to the operation of existing servers.


> But, there is an advantage to encoding the IAID
> and DUID in the option as it supports current
> DHCP server implementations. Without this, a
> client that has multiple interfaces (either
> connected to the same link or not) that are
> serviced by a single DHCP server might not get
> multiple addresses.
>
> I guess given the lesser of the two evils, I'm
> inclined to go along with the option as you've
> proposed it in the draft.
>
> So, I support this document moving forward.
>
...I'd prefer this work to be incorporated into a revision
of RFC2132, rather than creating a new RFC that will
probably be obsoleted shortly after publication, which also
gives us the opportunity to more fully consider the
ramifications of altering the semantics of the client
identifier in the context of DHCP-DNS dynamic updates.

--Barr


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I support advancing this draft, to reclassify DHCPv4 options
in the range 128-223 as public, not private or
vendor-specific options.

--Barr


> -----Original Message-----
> From: Ralph Droms
> Sent: Monday, 05 April 2004 05:46
>
> Please respond to this WG last call.  If you
> support acceptance of the
> document without change, respond with a simple
> acknowledgment, so that
> support for the document can be assessed.
>


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From dhcwg-admin@ietf.org  Thu Apr  8 18:12:28 2004
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Subject: [dhcwg] Revised charter
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Here is a draft charter for the WG, based on discussion at the WG meeting in
Seoul and discussion on the mailing list.  Please review and respond with
comments.

- Ralph

dhc WG draft revised charter
----------------------------

The dhc working group (DHC WG) has developed DHCP for automated
allocation, configuration and management of IP addresses and TCP/IP
protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
is documented in RFC2131 and RFC2132.  DHCPv6 is currently a "Proposed
Standard" and is documented in RFC3315.  Subsequent RFCS document
additional options and other enhancements to the specifications.

The DHC WG is responsible for reviewing (and sometimes developing)
DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
is expected to review all proposed extensions to DHCP to ensure that
they are consistent with the DHCP specification and other option
formats, that they do not duplicate existing mechanisms, etc. The DHC
WG will not (generally) be responsible for evaluating the semantic
content of proposed options. The DHC WG will not adopt new proposals
for extensions to DHCP as working group documents without first
coordinating with other relevant working groups and determining who
has the responsibility for reviewing the semantic content of an
option.

The DHC WG has the following main objectives:

* The DHC WG will address security in DHCP

   o Develop and document security requirements for DHCP. RFC 3118
     defines current security mechanisms for DHCPv4. Unfortunately, RFC
     3118 has neither been implemented nor deployed to date.  Specific
     issues to be considered include:

     - Improved key management and scalability

     - Security for messages passed between relay agents and servers

     - Threats of DoS attacks through FORCERENEW

     - The increased usage of DHC on unsecured (e.g., wireless) and
       public LANs

     - The need for clients to be able to authenticate servers, without
       simultaneously requiring client authentication by the server.

   o Develop and document a roadmap of any new documents or protocols
     needed to meet the security requirements for DHCP

* Write an analysis of the DHCP specification, including RFC2131,
   RFC2132 and other RFCs defining additional options, which identifies
   ambiguities, contradictory specifications and other obstacles to
   development of interoperable implementations. Recommend a process
   for resolving identified problems and incorporating the resolutions
   into the DHCP specification.

* Hosts that include implementations of both IPv4 and IPv6
   ("dual-stack hosts") may use DHCP to obtain configuration settings
   (including assigned addresses) for both IPv4 and IPv6.  The DHCPv4
   and DHCPv6 specifications (RFC2131, RFC2132, RFC3315 and subsequent
   RFCs) do not explicitly explain how a dual-stack host uses DHCP to
   obtain configuration settings for both IP stacks. The dhc WG will
   assess the requirements for a dual-stack host to use DHCP to obtain
   configuration settings for both IPv4 and IPv6, review alternative
   solutions and select a solution, and develop, review and publish a
   document that defines the chosen solution.

* The DHCPv6 specification in RFC3315 includes a mechanism through
   which clients can obtain other configuration information without
   obtaining an address or addresses.  This mechanisms is sometimes
   called "stateless DHCPv6".  RFC3315 includes no provision for
   notifying DHCPv6 clients using stateless DHCPv6 of changes in the
   configuration information supplied to the client or any
   recommendations as to when a client should obtain possibly updated
   information.  The dhc WG will assess the requirements for informing
   DHCPv6 clients of changes in configuration information, review
   alternative solutions and select a solution, and develop, review and
   publish a specification for the chosen solution.


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Subject: Re: [dhcwg] Security for leasequery messages
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Folks,

This is clearly an issue, and there are no easy answers.
Here is one approach:

Nothing is mandatory to implement, since one approach is to
ensure that there is physical security between the access
concentrator and the DHCP server.

A better approach is to use some form of the not-yet-fully-baked
relay agent authentication.  For example:

http://www.ietf.org/internet-drafts/draft-ietf-dhc-auth-suboption-03.txt

but since this is still coming along, it can't be mandatory,
that's for sure.  We could wait to standardize leasequery until
something was approved for relay agent authentication, but that
will further delay something that has already undergone numerous
delays.  There are large number of similar-to-the-standard
leasequery installations, and more every day.  It would be nice
to bring them all into compliance over time, and time is
getting away from us.

One approach would be to make something mandatory once that
something exists, which is a little odd but perhaps doable.  We
might be able to say:

        "When some form of relay-agent to DHCP server
        authentication becomes a standard, its use for leasequery
        becomes mandatory."

Something to consider.

Any other ideas for handle this one?

Cheers -- Kim

At 07:56 PM 4/6/2004, Ralph Droms wrote:
>The following issues relate to security for leasequery messages:
>
>Steve Bellovin:
>
>Discuss:
>(26 March 2004)
>The Security Considerations section says this:
>
>   DHCP servers SHOULD prevent exposure of location information
>   (particularly the mapping of hardware address to IP address lease,
>   which can be an invasion of broadband subscriber privacy) by
>   employing some form of relay agent authentication between the
>   DHCPLEASEQUERY client and the DHCP server.
>
>   Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
>   path to the DHCP server is secure.  Clients SHOULD use Relay Agent
>   Information security as a way to achieve this goal.
>
>What is "some form of ... authentication"?  What is "Relay Agent Information
>security"?  Put another way, what is mandatory to implement?
>
>Russ Housley:
>
>Discuss:
>  Section 7 says:
>  >
>  > DHCP servers SHOULD prevent exposure of location information
>  > (particularly the mapping of hardware address to IP address lease,
>  > which can be an invasion of broadband subscriber privacy) by
>  > employing some form of relay agent authentication between the
>  > DHCPLEASEQUERY client and the DHCP server.
>  >
>  There needs to be more discussion of the authentication requirements.
>  I would prefer the specification to name a mandatory-to-implement
>  mechanism, but that may be asking too much.
>
>  Section 7 also says:
>  >
>  > Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
>  > path to the DHCP server is secure.
>  >
>  What security services are needed?  Integrity, authentication, access
>  control, replay protection confidentiality?  The hint about Relay Agent
>  Information security, with no reference, is not sufficient.
>
>
>
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From dhcwg-admin@ietf.org  Thu Apr  8 18:13:28 2004
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Date: Wed, 07 Apr 2004 16:42:30 -0400
To: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org
From: Kim Kinnear <kkinnear@cisco.com>
Subject: Re: [dhcwg] Leasequery protocol issue
Cc: kkinnear@cisco.com
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At 08:47 PM 4/6/2004, Ralph Droms wrote:
>Thomas Narten:
>
>Discuss:
>I wonder if the following is a possible protocol issue:
>
>Assume a client is connected to access concentrator A, and obtains a
>lease. Client moves to concentrator B, and obtains a second lease. B
>looses state, and issues lease query. Server will return two
>addresses. How does B know which addresses (and location info) applies
>to it (i.e, B) rather than A? Is there info in the protocol messages
>that allows B to determine which address is its? E.g., does the
>relay-agent info include such an identification in it?

        In some cases, I believe the relay agent info does indeed
        include sufficient information for the access
        concentrator to tell which address belongs to it.  There
        is no requirement in the relay-agent-info RFC for that to
        be the case, however.

        I think we could suggest (i.e., SHOULD) in the leasequery
        draft that the relay-agent-info have such information for
        any access concentrator that is going to employ
        leasequery, and present the scenario that you describe
        above as motivation.



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From dhcwg-admin@ietf.org  Thu Apr  8 18:13:29 2004
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Subject: Re: [dhcwg] Specifying what a DHCP server must implement for
  leasequery
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At 08:49 PM 4/6/2004, Ralph Droms wrote:
>Thomas Narten:
>
>Discuss:
>
>Make it absolutely clear what a server must implement (in terms of the
>options it must store), especially in the case of options that already
>exist, but that a server may not be required to store. E.g, what is
>required for this spec that is different from normal DHC. relay agent
>option, client identifier (??).

        The client-identifier must already be stored, or you
        don't have much of a DHCP server.

        I thought that we'd made the options to store and return
        clear, but obviously it isn't absolutely clear or we
        wouldn't have this issue, so we need to make it
        more clear.


>Specific comments:
>
>>       o Query by IP address:
>>
>>         For this query, the requester supplies only an IP address in the
>>         DHCPLEASEQUERY message.  The DHCP server will return any
>>         information that it has on the most recent client to have been
>>         assigned that IP address.
>
>make clear what info must be echoed back, esp. relay agent option,
>since there is no requirement in existing DHC that a server store
>it...
>
>
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From dhcwg-admin@ietf.org  Thu Apr  8 18:14:29 2004
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Date: Thu, 08 Apr 2004 09:20:45 -0400
To: dhcwg@ietf.org
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] dhc WG last call on
  draft-ietf-dhc-rapid-commit-opt-00
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I see that this draft includes a notice regarding IPR.  The Samsung IPR
statement appears to apply across all IETF submissions.  Can the authors
clarify if there are any IPR claims that apply specifically to this document?

The format of the option - specifically, option length == 0 - is consistent
with other DHCP options.  Will length 0 cause problems in practice with
deployed DHCP servers?

The document should be republished to include RFC 3667 boilerplate,
including the RFC 3667 IPR notification statement.

I have one editorial comment: the document should indicate that the use of
Rapid Commit is optional on the part of the client, under local (client)
admin control.  In section 3, I suggest changing the first sentence:

      A client that supports the Rapid Commit option SHOULD include it in
      DHCPDISCOVER messages that it sends.

to:

      If a client that supports the Rapid Commit option intends to use
      the rapid commit capability, it includes a Rapid Commit option in
      DHCPDISCOVER messages that it sends.

In section 3.1, list item 1, I suggest changing the first sentence:

         1. The client broadcasts a DHCPDISCOVER message on its local
            physical subnet and  SHOULD include the Rapid Commit option if
            it supports this option.

to:

         1. The client broadcasts a DHCPDISCOVER message on its local
            physical.  If the client supports the Rapid Commit option
            and intends to use the rapid commit capability, it includes
            a Rapid Commit option in the DHCPDISCOVER message.


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Date: Thu, 08 Apr 2004 08:49:04 -0400
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Subject: Re: [dhcwg] dhc WG last call on draft-ietf-dhc-3315id-for-v4-01
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Ted, Bill - can you give examples of real client identifiers and how those
client identifiers would be used in the three examples you describe in
section 2.2?

I guess my question is getting at the problem of "requirements"; I think the
document would be clarified by a section between 2 and 3 that summarizes the
requirements for client identifiers, based on the problem examples in
section 2.

- Ralph


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From dhcwg-admin@ietf.org  Thu Apr  8 19:00:42 2004
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Date: Thu, 08 Apr 2004 08:37:39 -0400
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This document reflects WG consensus on how to make more DHCP option codes
available to avoid exhaustion of the option code space.

Although there are known uses of option codes in the range 128-254 (both
documented and undocumented), the procedure described in this document
provides a way to avoid clashes in the use of reclassified options.

Editorial suggestions and comments:

The references should be listed as Normative and Informative.

Section 3, change the first sentence to: "The DHCP option space (0-255) is
divided into two ranges [RFC2132]:"

Reference [unused-optioncodes] has been published as RFC 3679.

The document should include boilerplate from RFC 3667 when it is revised.


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From dhcwg-admin@ietf.org  Thu Apr  8 19:00:43 2004
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Date: Thu, 08 Apr 2004 08:30:51 -0400
To: dhcwg@ietf.org
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] dhc WG last call on draft-ietf-dhc-vendor-01
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This specification provides a useful extension to the vendor class and
vendor specific options capabilities in DHCP.  The requirements for these
capabilities are based on experience with competing uses for the existing
vendor class and vendor specific options in DHCP deployments.

I agree with the decision to define these two capabilities as separate
options for simplicity and to minimize the requirement for RFC 3396 option
concatenation.  While the current DHCP option code space is nearing
exhaustion, draft-ietf-dhc-reclassify-options (currently in WG last call)
will increase the available option codes, reducing the need for option code
conservation.

The specification should separate the references into Normative and
Informative, and should be updated to include the boilerplate from RFC 3667.

Note to draft authors using xml2rfc: you can include the appropriate
boilerplate in your docs by moving to version 1.22 and setting the ipr tag
to "full3667".

- Ralph


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From dhcwg-admin@ietf.org  Thu Apr  8 20:25:41 2004
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From: "Bernie Volz" <volz@cisco.com>
To: <dhcwg@ietf.org>, <iesg@ietf.org>
Subject: RE: [dhcwg] Should the leasequery spec explicitly be IPv4-specific?
Date: Thu, 8 Apr 2004 16:03:53 -0400
Organization: Cisco
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YES!

As this specification deals with DHCPv4 (is extends DHCPv4), it should
be IPv4 specific.

It is a separate issue as to whether corresponding functionality will be
needed for DHCPv6 and something that the WG should take up.

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ralph Droms
Sent: Tuesday, April 06, 2004 8:25 PM
To: dhcwg@ietf.org
Subject: [dhcwg] Should the leasequery spec explicitly be IPv4-specific?


Bert Wijnen:

Discuss:
- It seems to be implicitly IPv4 specific without explaining/justifying
why
   and uses "IP address" to mean IPv4 addresses only. Do we not want
them
   to either be IPv4/v6 agnostic or to be specific in stating that they
   are IPv4 only if such is the case and justified?


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From dhcwg-admin@ietf.org  Thu Apr  8 20:27:43 2004
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From: Kim Kinnear <kkinnear@cisco.com>
Subject: Re: [dhcwg] Should the leasequery spec explicitly be
  IPv4-specific?
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At 08:24 PM 4/6/2004, Ralph Droms wrote:
>Bert Wijnen:
>
>Discuss:
>- It seems to be implicitly IPv4 specific without explaining/justifying why
>  and uses "IP address" to mean IPv4 addresses only. Do we not want them
>  to either be IPv4/v6 agnostic or to be specific in stating that they
>  are IPv4 only if such is the case and justified?

        This is really just an oversight -- leasequery is IPv4 specific.
        We'll fix the draft to make this clear.

        Cheers -- Kim



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From dhcwg-admin@ietf.org  Thu Apr  8 20:28:09 2004
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To: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org
From: Kim Kinnear <kkinnear@cisco.com>
Subject: Re: [dhcwg] Restrictions of information flow in leasequery
  messages
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At 08:16 PM 4/6/2004, Ralph Droms wrote:
>Ted Hardie:
>
>Discuss:
>This whole method has "invitation to mischief" printed in large, block letters across its
>shirt.  After being told repeatedly that there is no restriction on the use cases for this
>mechanism, this text:
>
>        For this query, the requester supplies only an IP address in the
>        DHCPLEASEQUERY message.  The DHCP server will return any
>        information that it has on the most recent client to have been
>        assigned that IP address.
>
>sets off lots of alarm bells.  If I read this right, *any information* associated
>with that IP address is returned?  If information used to construct a location
>object is present (as in the geopriv dhcp-li draft), that would get returned?
>That seems kind of excessive for an access concentrator, but very, very nice
>for a black hat.  This whole section on Parameter Request List options:
>
>        The Parameter Request List option (option 55) SHOULD be set to
>        the options of interest to the requester.  The interesting
>        options are likely to include the IP Address Lease Time option
>        (option 51), the Relay Agent Information option (option 82) and
>        possibly the Vendor class identifier option (option 60).  In the
>        absence of a Parameter Request List option, the server SHOULD
>        return the same options it would return for a DHCPREQUEST
>        message which didn't contain a DHCPLEASEQUERY message, which
>        includes those mandated by [RFC 2131, Section 4.3.1] as well as
>        any options which the server was configured to always return to
>        a client.
>
>has no restrictions of any type on the return of any data.  Why is all
>of this data being made available via this method?

        I suppose because all of this data is already available on
        the wire (and sometimes broadcast) if you just watch it 
        go by.  Of course, you have to *be* on the wire to see it
        that way.

        What do the rest of you think about this issue?

        Cheers -- Kim


>It's too bad that SNMP is off the table here, as that would give you a realistic
>way to limit data to specific queries and queriers.
>
>Limiting the protocol to a very specific use that fits the
>demonstrated need seems like it would make getting the security
>mechanisms right easier; if this is meant to be truly general purpose,
>it needs a general purpose mechanism that would give it the same level
>of security as SNMP would for this same purpose.
>
>
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Date: Thu, 08 Apr 2004 16:54:17 -0400
To: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org
From: Kim Kinnear <kkinnear@cisco.com>
Subject: Re: [dhcwg] Use of SNMP instead of leasequery
Cc: kkinnear@cisco.com
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At 08:20 PM 4/6/2004, Ralph Droms wrote:
>Bert Wijnen:
>
>Discuss:
>- what is the status of this solution vs DHCP MIB solution (I thought
>  they were competing solutions some time back).

        The working group felt that there was sufficient utility
        in this solution to pursue it.

>  The DHC MIB has also been submitted for PS, no? I know it is still in
>  MIB Doctor review... but it is a 2nd solution to same problem.

        I think we all saw the MIB as a solution to a moderately
        different problem, with different performance characteristics
        and different protocol interpreter requirements.

        Cheers -- Kim

>- The reasonings for not using SNMP and MIB seem very weak to me
>
>Ted Hardie:
>
>Discuss:
>
>It's too bad that SNMP is off the table here, as that would give you a realistic
>way to limit data to specific queries and queriers.
>
>
>_______________________________________________
>dhcwg mailing list
>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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Date: Fri, 09 Apr 2004 14:50:05 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] Revised charter
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Can we show a mobility issue in the DHC charter ?
* The DHC WG will address mobility in DHCP

Or out of scope of the DHC charter at this stage ?

Regarding this issue, I am trying to propose a
new draft as a starting point to discuss mobility
support for the DHCP and it will be available in the
middle of this month.


Regards.


- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Ralph Droms
> Sent: Wednesday, April 07, 2004 9:54 PM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Revised charter
> 
> 
> Here is a draft charter for the WG, based on discussion at 
> the WG meeting in
> Seoul and discussion on the mailing list.  Please review and 
> respond with
> comments.
> 
> - Ralph
> 
> dhc WG draft revised charter
> ----------------------------
> 
> The dhc working group (DHC WG) has developed DHCP for automated
> allocation, configuration and management of IP addresses and TCP/IP
> protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
> is documented in RFC2131 and RFC2132.  DHCPv6 is currently a "Proposed
> Standard" and is documented in RFC3315.  Subsequent RFCS document
> additional options and other enhancements to the specifications.
> 
> The DHC WG is responsible for reviewing (and sometimes developing)
> DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
> is expected to review all proposed extensions to DHCP to ensure that
> they are consistent with the DHCP specification and other option
> formats, that they do not duplicate existing mechanisms, etc. The DHC
> WG will not (generally) be responsible for evaluating the semantic
> content of proposed options. The DHC WG will not adopt new proposals
> for extensions to DHCP as working group documents without first
> coordinating with other relevant working groups and determining who
> has the responsibility for reviewing the semantic content of an
> option.
> 
> The DHC WG has the following main objectives:
> 
> * The DHC WG will address security in DHCP
> 
>    o Develop and document security requirements for DHCP. RFC 3118
>      defines current security mechanisms for DHCPv4. 
> Unfortunately, RFC
>      3118 has neither been implemented nor deployed to date.  Specific
>      issues to be considered include:
> 
>      - Improved key management and scalability
> 
>      - Security for messages passed between relay agents and servers
> 
>      - Threats of DoS attacks through FORCERENEW
> 
>      - The increased usage of DHC on unsecured (e.g., wireless) and
>        public LANs
> 
>      - The need for clients to be able to authenticate 
> servers, without
>        simultaneously requiring client authentication by the server.
> 
>    o Develop and document a roadmap of any new documents or protocols
>      needed to meet the security requirements for DHCP
> 
> * Write an analysis of the DHCP specification, including RFC2131,
>    RFC2132 and other RFCs defining additional options, which 
> identifies
>    ambiguities, contradictory specifications and other obstacles to
>    development of interoperable implementations. Recommend a process
>    for resolving identified problems and incorporating the resolutions
>    into the DHCP specification.
> 
> * Hosts that include implementations of both IPv4 and IPv6
>    ("dual-stack hosts") may use DHCP to obtain configuration settings
>    (including assigned addresses) for both IPv4 and IPv6.  The DHCPv4
>    and DHCPv6 specifications (RFC2131, RFC2132, RFC3315 and subsequent
>    RFCs) do not explicitly explain how a dual-stack host uses DHCP to
>    obtain configuration settings for both IP stacks. The dhc WG will
>    assess the requirements for a dual-stack host to use DHCP to obtain
>    configuration settings for both IPv4 and IPv6, review alternative
>    solutions and select a solution, and develop, review and publish a
>    document that defines the chosen solution.
> 
> * The DHCPv6 specification in RFC3315 includes a mechanism through
>    which clients can obtain other configuration information without
>    obtaining an address or addresses.  This mechanisms is sometimes
>    called "stateless DHCPv6".  RFC3315 includes no provision for
>    notifying DHCPv6 clients using stateless DHCPv6 of changes in the
>    configuration information supplied to the client or any
>    recommendations as to when a client should obtain possibly updated
>    information.  The dhc WG will assess the requirements for informing
>    DHCPv6 clients of changes in configuration information, review
>    alternative solutions and select a solution, and develop, 
> review and
>    publish a specification for the chosen solution.
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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From dhcwg-admin@ietf.org  Fri Apr  9 08:29:32 2004
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Date: Fri, 09 Apr 2004 08:24:55 -0400
To: "S. Daniel Park" <soohong.park@samsung.com>
From: Ralph Droms <rdroms@cisco.com>
Subject: RE: [dhcwg] Revised charter
Cc: dhcwg@ietf.org, "'S. Daniel Park'" <soohong.park@samsung.com>
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Can you give us more details?  What problems would we
consider as part of mobility support in DHCP?

- Ralph

At 02:50 PM 4/9/2004 +0900, S. Daniel Park wrote:

>Can we show a mobility issue in the DHC charter ?
>* The DHC WG will address mobility in DHCP
>
>Or out of scope of the DHC charter at this stage ?
>
>Regarding this issue, I am trying to propose a
>new draft as a starting point to discuss mobility
>support for the DHCP and it will be available in the
>middle of this month.
>
>
>Regards.
>
>
>- Daniel (Soohong Daniel Park)
>- Mobile Platform Laboratory, SAMSUNG Electronics.
>
> > -----Original Message-----
> > From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On
> > Behalf Of Ralph Droms
> > Sent: Wednesday, April 07, 2004 9:54 PM
> > To: dhcwg@ietf.org
> > Subject: [dhcwg] Revised charter
> >
> >
> > Here is a draft charter for the WG, based on discussion at
> > the WG meeting in
> > Seoul and discussion on the mailing list.  Please review and
> > respond with
> > comments.
> >
> > - Ralph
> >
> > dhc WG draft revised charter
> > ----------------------------
> >
> > The dhc working group (DHC WG) has developed DHCP for automated
> > allocation, configuration and management of IP addresses and TCP/IP
> > protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
> > is documented in RFC2131 and RFC2132.  DHCPv6 is currently a "Proposed
> > Standard" and is documented in RFC3315.  Subsequent RFCS document
> > additional options and other enhancements to the specifications.
> >
> > The DHC WG is responsible for reviewing (and sometimes developing)
> > DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
> > is expected to review all proposed extensions to DHCP to ensure that
> > they are consistent with the DHCP specification and other option
> > formats, that they do not duplicate existing mechanisms, etc. The DHC
> > WG will not (generally) be responsible for evaluating the semantic
> > content of proposed options. The DHC WG will not adopt new proposals
> > for extensions to DHCP as working group documents without first
> > coordinating with other relevant working groups and determining who
> > has the responsibility for reviewing the semantic content of an
> > option.
> >
> > The DHC WG has the following main objectives:
> >
> > * The DHC WG will address security in DHCP
> >
> >    o Develop and document security requirements for DHCP. RFC 3118
> >      defines current security mechanisms for DHCPv4.
> > Unfortunately, RFC
> >      3118 has neither been implemented nor deployed to date.  Specific
> >      issues to be considered include:
> >
> >      - Improved key management and scalability
> >
> >      - Security for messages passed between relay agents and servers
> >
> >      - Threats of DoS attacks through FORCERENEW
> >
> >      - The increased usage of DHC on unsecured (e.g., wireless) and
> >        public LANs
> >
> >      - The need for clients to be able to authenticate
> > servers, without
> >        simultaneously requiring client authentication by the server.
> >
> >    o Develop and document a roadmap of any new documents or protocols
> >      needed to meet the security requirements for DHCP
> >
> > * Write an analysis of the DHCP specification, including RFC2131,
> >    RFC2132 and other RFCs defining additional options, which
> > identifies
> >    ambiguities, contradictory specifications and other obstacles to
> >    development of interoperable implementations. Recommend a process
> >    for resolving identified problems and incorporating the resolutions
> >    into the DHCP specification.
> >
> > * Hosts that include implementations of both IPv4 and IPv6
> >    ("dual-stack hosts") may use DHCP to obtain configuration settings
> >    (including assigned addresses) for both IPv4 and IPv6.  The DHCPv4
> >    and DHCPv6 specifications (RFC2131, RFC2132, RFC3315 and subsequent
> >    RFCs) do not explicitly explain how a dual-stack host uses DHCP to
> >    obtain configuration settings for both IP stacks. The dhc WG will
> >    assess the requirements for a dual-stack host to use DHCP to obtain
> >    configuration settings for both IPv4 and IPv6, review alternative
> >    solutions and select a solution, and develop, review and publish a
> >    document that defines the chosen solution.
> >
> > * The DHCPv6 specification in RFC3315 includes a mechanism through
> >    which clients can obtain other configuration information without
> >    obtaining an address or addresses.  This mechanisms is sometimes
> >    called "stateless DHCPv6".  RFC3315 includes no provision for
> >    notifying DHCPv6 clients using stateless DHCPv6 of changes in the
> >    configuration information supplied to the client or any
> >    recommendations as to when a client should obtain possibly updated
> >    information.  The dhc WG will assess the requirements for informing
> >    DHCPv6 clients of changes in configuration information, review
> >    alternative solutions and select a solution, and develop,
> > review and
> >    publish a specification for the chosen solution.
> >
> >
> > _______________________________________________
> > dhcwg mailing list
> > dhcwg@ietf.org
> > https://www1.ietf.org/mailman/listinfo/dhcwg
> >


_______________________________________________
dhcwg mailing list
dhcwg@ietf.org
https://www1.ietf.org/mailman/listinfo/dhcwg


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To: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp>
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] Revised charter
Cc: dhcwg@ietf.org
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Jinmei-san - thanks for catching the typo, and I will add
a reference to the newly published RFC 3736.

- Ralph

At 11:08 AM 4/9/2004 +0900, JINMEI Tatuya / 
=?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= wrote:
> >>>>> On Wed, 07 Apr 2004 08:53:58 -0400,
> >>>>> Ralph Droms <rdroms@cisco.com> said:
>
> > Here is a draft charter for the WG, based on discussion at the WG 
> meeting in
> > Seoul and discussion on the mailing list.  Please review and respond with
> > comments.
>
>It basically looks good.  A couple of minor comments:
>
> > Standard" and is documented in RFC3315.  Subsequent RFCS document
> > additional options and other enhancements to the specifications.
>
>s/RFCS/RFCs/ ?
>
> > * The DHCPv6 specification in RFC3315 includes a mechanism through
> >    which clients can obtain other configuration information without
> >    obtaining an address or addresses.  This mechanisms is sometimes
> >    called "stateless DHCPv6".  RFC3315 includes no provision for
> >    notifying DHCPv6 clients using stateless DHCPv6 of changes in the
> >    configuration information supplied to the client or any
> >    recommendations as to when a client should obtain possibly updated
> >    information.  The dhc WG will assess the requirements for informing
> >    DHCPv6 clients of changes in configuration information, review
> >    alternative solutions and select a solution, and develop, review and
> >    publish a specification for the chosen solution.
>
>We may want to add RFC3736 as a reference of "stateless DHCPv6".
>
>                                         JINMEI, Tatuya
>                                         Communication Platform Lab.
>                                         Corporate R&D Center, Toshiba Corp.
>                                         jinmei@isl.rdc.toshiba.co.jp


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From dhcwg-admin@ietf.org  Fri Apr  9 09:44:31 2004
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To: Pekka Savola <pekkas@netcore.fi>
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
Cc: Ted Lemon <mellon@fugue.com>, dhcwg@ietf.org
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It is not be necessary to touch the router in all cases...

An IPv6 "home gateway" with a single upstream interface (to
the service provider) and one or more downstream interfaces
will operate in a sufficiently constrained environment so
as to allow plug-and-play operation with only minimal
configuration (such as a prefix delegated from the service
provider).  In this case, if the service provider makes IPv6
service available through a configured tunnel, the only other
configuration required would be the address of the other
endpoint of the tunnel.  It would make sense to provide
that endpoint address through DHCP along with the delegated
prefix.

Now, the dhc WG is debating whether or not to take on this
option as a WG work item, because it applies to router
configuration rather than host configuration.  The use
case is there - it's a matter of charter scope.

- Ralph

At 09:06 AM 4/5/2004 +0300, Pekka Savola wrote:
>On Sun, 4 Apr 2004, Ted Lemon wrote:
> > On Apr 2, 2004, at 7:44 AM, Pekka Savola wrote:
> > > You're trading off having to
> > > configure 90 tunnels in 10 border routers to having to configure 90
> > > tunnels in 10 DHCPv6 servers.
> > >
> > > IMHO, in this kind of set-up, Using DHCPv6 just doesn't seem to make
> > > sense.
> >
> > Possibly it's easier to configure a DHCP server on a central server
> > somewhere with all this information rather than configuring the router,
> > because if the router dies then you have to remember to reconfigure it.
> >
> >    But basically, I don't know.   :')
>
>You'll have to reconfigure the router in any case to get the other
>connectivity working ;-).
>
>Here, you don't get aggregation benefits as you have to configure
>exactly the same information in 10 DHCPv6 servers as you'd have to do
>in 10 routers.  If you would only need to configure 1 DHCPv6 server to
>get the config to all the routers, some folks might think this gives
>additional benefits.
>
>--
>Pekka Savola                 "You each name yourselves king, yet the
>Netcore Oy                    kingdom bleeds."
>Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
>
>
>_______________________________________________
>dhcwg mailing list
>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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From dhcwg-admin@ietf.org  Fri Apr  9 10:23:30 2004
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From: Pekka Savola <pekkas@netcore.fi>
To: Ralph Droms <rdroms@cisco.com>
cc: Ted Lemon <mellon@fugue.com>, <dhcwg@ietf.org>
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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On Fri, 9 Apr 2004, Ralph Droms wrote:
> An IPv6 "home gateway" with a single upstream interface (to
> the service provider) and one or more downstream interfaces
> will operate in a sufficiently constrained environment so
> as to allow plug-and-play operation with only minimal
> configuration (such as a prefix delegated from the service
> provider).  In this case, if the service provider makes IPv6
> service available through a configured tunnel, the only other
> configuration required would be the address of the other
> endpoint of the tunnel.  It would make sense to provide
> that endpoint address through DHCP along with the delegated
> prefix.

To be able to run DHCP*v6* between the CPE and the ISP, there has to
be IPv6 connectivity.  If there is no v6 connectivity, you cannot use
DHCPv6.  If there _is_ v6 connectivity, you do not need a configured
tunnel, because you already have v6 connectivity.

Am I missing something? 

(Or are you visualizing the scenario where there would be IPv6 
link-local connectivity, but for global connectivity, you would have 
to use a tunnel?  If so, could you describe a specific scenario as I 
fail to see where this would apply to?)

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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From dhcwg-admin@ietf.org  Fri Apr  9 10:25:29 2004
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Date: Fri, 09 Apr 2004 10:21:53 -0400
To: Pekka Savola <pekkas@netcore.fi>
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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Looks like I was missing something.  I confused
draft-ietf-dhc-dhcpv6-ctep-opt-01 with draft-daniel-dhc-ipv6in4-opt-02.  I
think my confusion arose because of the context of the conversation.  I had
understood draft-ietf-dhc-dhcpv6-ctep-opt-01 to be intended to inform a host
of a tunnel endpoint (which I think would normally be accomplished through
routing protocols) and draft-daniel-dhc-ipv6in4-opt-02 to talk about
configuring isolated routers with the endpoint of a tunnel.

My apologies for thoroughly confusing the conversation...

So, let's leave draft-daniel-dhc-ipv6in4-opt-02 out of this discussion for
the moment.  Back to the scenario you asked about...I can imagine (if you'll
give me a moment of suspension-of-disbelief) that an ISP might want to
provide IPv6/linklocal service between the service provider's edge router
and the customer routers, without going to full IPv6 connectivity in its
core.  In that scenario, the customer router could use DHCPv6 to obtain a
prefix and a tunnel endpoint from a server in the service provider's edge
router, while needing the tunnel for full external IPv6 connectivity.

But that does seem like a far-fetched scenario...

- Ralph


At 04:53 PM 4/9/2004 +0300, Pekka Savola wrote:
>On Fri, 9 Apr 2004, Ralph Droms wrote:
> > An IPv6 "home gateway" with a single upstream interface (to
> > the service provider) and one or more downstream interfaces
> > will operate in a sufficiently constrained environment so
> > as to allow plug-and-play operation with only minimal
> > configuration (such as a prefix delegated from the service
> > provider).  In this case, if the service provider makes IPv6
> > service available through a configured tunnel, the only other
> > configuration required would be the address of the other
> > endpoint of the tunnel.  It would make sense to provide
> > that endpoint address through DHCP along with the delegated
> > prefix.
>
>To be able to run DHCP*v6* between the CPE and the ISP, there has to
>be IPv6 connectivity.  If there is no v6 connectivity, you cannot use
>DHCPv6.  If there _is_ v6 connectivity, you do not need a configured
>tunnel, because you already have v6 connectivity.
>
>Am I missing something?
>
>(Or are you visualizing the scenario where there would be IPv6
>link-local connectivity, but for global connectivity, you would have
>to use a tunnel?  If so, could you describe a specific scenario as I
>fail to see where this would apply to?)
>
>--
>Pekka Savola                 "You each name yourselves king, yet the
>Netcore Oy                    kingdom bleeds."
>Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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<P ALIGN="CENTER"><!-- Please, follow the links:
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--><FONT FACE="Garamond">(ref.:tcc) ConstruNews deseja uma Feliz P&aacute;scoa a todos os seus amigos e suas respectivas fam&iacute;lias! 
</FONT><P ALIGN="CENTER"><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:EnEspa&ntilde;ol">Lindenberg:EnEspa&ntilde;ol</A><FONT FACE="Garamond"> - </FONT><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:InEnglish(LinkToFreeTranslator)">Lindenberg:InEnglish(LinkToFreeTranslator)</A></P>
<B><FONT FACE="Garamond" SIZE=4><P>S&eacute;rie Temas Patrulhados</FONT><FONT FACE="Garamond" SIZE=5> (5)</B></FONT><FONT FACE="Garamond" SIZE=4> </P>
</FONT><B><FONT FACE="Garamond" SIZE=5><P ALIGN="CENTER">"Livre-com&eacute;rcio, divisor de &aacute;guas entre os favor&aacute;veis e os contr&aacute;rios &agrave; liberdade econ&ocirc;mica"</P>
</B></FONT><I><FONT FACE="Garamond" SIZE=4><P ALIGN="CENTER">No atual governo brasileiro, o componente ideol&oacute;gico que impregna setores do Itamaraty, regredindo ao terceiro-mundismo dos anos 70, os leva a admitir acordos comerciais com qualquer pa&iacute;s, especialmente, os do "sul", mas n&atilde;o com os Estados Unidos, uma atitude irrealista e m&iacute;ope de nossa diplomacia, afirma Adolpho Lindenberg em recente artigo</P>
</I></FONT><FONT FACE="Garamond"><P>* Adolpho Lindenberg &eacute; autor do livro <B>"Os cat&oacute;licos e a economia de mercado"</B>, em que denuncia uma pol&iacute;tica com vi&eacute;s esquerdista que censura, marginaliza ou encobre com um manto de sil&ecirc;ncio, opini&otilde;es "politicamente incorretas", n&atilde;o afinados com as assim denominadas "causas sociais" inspiradas na teologia da liberta&ccedil;&atilde;o e nos F&oacute;runs Sociais. Assim, os meios de comunica&ccedil;&atilde;o, e a pr&oacute;pria sociedade brasileira, est&atilde;o sendo "patrulhados".</P>
<P>* Em seu recente artigo <B>"A economia de mercado e o livre-com&eacute;rcio"</B>, da S&eacute;rie Temas Patrulhados, o autor lamenta que a economia de mercado e o livre-com&eacute;rcio continuem sendo o alvo predileto da dial&eacute;tica intervencionista e progressista. Os argumentos usados se repetem como certas melodias dos cl&aacute;ssicos realejos de antigamente, comenta Lindenberg, que em seu artigo enumera uma s&eacute;rie dessas diatribes, das quais citamos aqui:</P>
<P>- Livres de quaisquer tabelamento ou fiscaliza&ccedil;&atilde;o de "&oacute;rg&atilde;os competentes", os pre&ccedil;os subiriam assustadoramente, empobrecendo os consumidores, deixando-os indefesos diante da gan&acirc;ncia dos industriais, fazendeiros, comerciantes, etc.</P>
<P>- A gan&acirc;ncia dos industriais e o esmagamento das pequenas empresas incapazes de competir contra os gigantes empresariais, s&oacute; sofreriam limites se o Estado intervier no mercado, via controle de pre&ccedil;os, estatiza&ccedil;&atilde;o das empresas de servi&ccedil;os p&uacute;blicos, subs&iacute;dios e barreiras alfandeg&aacute;rias.</P>
<P>- O livre-com&eacute;rcio seria a porta de entrada dos produtos das multinacionais em nosso pa&iacute;s com o intuito de nos explorar e nos submeter ao imperialismo norte-americano.</P>
<P>* A estas e outras diatribes analisadas e refutadas no artigo, se soma, no atual governo brasileiro, o componente ideol&oacute;gico que passou a impregnar setores do Itamaraty, parecendo ter regredido ao terceiro-mundismo dos anos 70, dispostos a admitir acordos comerciais com qualquer pa&iacute;s, especialmente, os do "sul", mas n&atilde;o com os Estados Unidos. Atitude de nossa diplomacia que tem sido qualificada de "irrealista" por analistas pol&iacute;ticos e criticada enfaticamente.</P>
<P>* A &uacute;nica corre&ccedil;&atilde;o poss&iacute;vel para essa miopia consiste numa boa compreens&atilde;o do que seja uma concorr&ecirc;ncia sadia e de como a competitividade entre os produtores constitui o instrumento natural para manter os pre&ccedil;os dos produtos pouco acima de seu pre&ccedil;o de custo, explica Lindenberg.</P>
<P>* O mercado &eacute; uma realidade funcional que oferece condi&ccedil;&otilde;es para produtores e consumidores, vendedores e compradores entrarem em contato entre si, com vistas a conhecer, avaliar e comparar os bens oferecidos e eventualmente chegar a acordos sobre pre&ccedil;os. Tais combina&ccedil;&otilde;es s&atilde;o obtidas mediante o livre jogo da oferta e da procura.</P>
<P>* Todos quantos consideram prefer&iacute;vel a determina&ccedil;&atilde;o dos pre&ccedil;os por via governamental - evitando destarte os "desmandos da lei da oferta e da procura" - por mais bem-intencionados que possam ser (requisito n&atilde;o muito comum em nossos dias...), por melhores que sejam os programas de seus computadores, nunca conseguir&atilde;o combinar as centenas de fatores que condicionam os pre&ccedil;os de um modo t&atilde;o perfeito, vivo e atualizado, como aqueles que emergem das pr&aacute;ticas mercadol&oacute;gicas.</P>
<P>* A aceita&ccedil;&atilde;o ou recusa do livre-com&eacute;rcio e suas conseq&uuml;&ecirc;ncias naturais, &eacute; o divisor de &aacute;guas entre as mentalidades favor&aacute;veis e as contr&aacute;rias &agrave; liberdade econ&ocirc;mica, conclui Lindenberg, cujo artigo oferecemos gratuitamente.</P>
<B><P>Link gratuito:</P>
</B><P>* Para receber gratuitamente, por e-mail, o texto completo deste artigo, clique em: </FONT><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:EsteArtigoCompletoGratuitamente(No.5)">Lindenberg:EsteArtigoCompletoGratuitamente(No.5)</A></P>
<B><FONT FACE="Garamond"><P>Outros links gratuitos (e-Book e outros artigos): </P>
</B></FONT><P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:e-BookGratuitoBr">Lindenberg:e-BookGratuitoBr</A><FONT FACE="Garamond"> (em formato Word, com 11 artigos de Lindenberg)</P>
</FONT><P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:Introdu&ccedil;&atilde;oGratuitaDoLivro">Lindenberg:Introdu&ccedil;&atilde;oGratuitaDoLivro</A><FONT FACE="Garamond"> (em formato Word, Introdu&ccedil;&atilde;o do livro "Os cat&oacute;licos e a economia de mercado")</P>
</FONT><P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:ArtigosAnteriores">Lindenberg:ArtigosAnteriores</A></P>
<P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:ProximosArtigos">Lindenberg:ProximosArtigos</A></P>
<B><FONT FACE="Garamond"><P>&nbsp;Links de opini&atilde;o</P>
</B><P>Gostariamos muito de receber seu seu voto eletr&ocirc;nico sobre a tem&aacute;tica abordada neste e-mail e, se poss&iacute;vel, conhecer sua valiosa opini&atilde;o:</P>
</FONT><P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:Concordo">Lindenberg:Concordo</A><FONT FACE="Garamond"> - </FONT><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:Discrepo">Lindenberg:Discrepo</A><FONT FACE="Garamond"> - </FONT><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:MinhaOpini&atilde;o">Lindenberg:MinhaOpini&atilde;o</A></P>
<B><FONT FACE="Garamond"><P>Outros links</P>
</B></FONT><P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:DesejoAdquirirLivro">Lindenberg:DesejoAdquirirLivro</A><FONT FACE="Garamond"> (receber&aacute; instru&ccedil;&otilde;es sobre como poder adquirir o livro no Brasil)</P>
</FONT><P><A HREF="mailto:livraria2004@yahoo.com.br?subject=Lindenberg:Remover">Remover</A><FONT FACE="Garamond"> (para ser retirado imediatamente de nosso Address Book).</P>
</FONT><B><FONT FACE="Garamond" SIZE=2><P ALIGN="CENTER">A difus&atilde;o desta mensagem, com uma finalidade cultural e com o intuito de promover um debate construtivo e respeitoso de id&eacute;ias, &eacute; de exclusiva responsabilidade da ConstruNews. Telefone de contato: (11) 9252 - 7873</P>
</B></FONT><FONT SIZE=4><P>&nbsp;</P>
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From dhcwg-admin@ietf.org  Fri Apr  9 11:59:31 2004
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Date: Fri, 9 Apr 2004 17:51:03 +0300 (EEST)
From: Pekka Savola <pekkas@netcore.fi>
To: Ralph Droms <rdroms@cisco.com>
cc: dhcwg@ietf.org
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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On Fri, 9 Apr 2004, Ralph Droms wrote:
> My apologies for thoroughly confusing the conversation...

No problem :)

> So, let's leave draft-daniel-dhc-ipv6in4-opt-02 out of this discussion for
> the moment.  Back to the scenario you asked about...I can imagine (if you'll
> give me a moment of suspension-of-disbelief) that an ISP might want to
> provide IPv6/linklocal service between the service provider's edge router
> and the customer routers, without going to full IPv6 connectivity in its
> core.  In that scenario, the customer router could use DHCPv6 to obtain a
> prefix and a tunnel endpoint from a server in the service provider's edge
> router, while needing the tunnel for full external IPv6 connectivity.
> 
> But that does seem like a far-fetched scenario...

Yes, it's very far-fetched, because in this specific scenario:

 1) the access network is usually the most difficult part to get 
native v6, and

 2) it's much simpler for all the concerned parties for the ISP to use 
internal tunneling to bridge the gaps in its core network.  Whether 
these tunnels are manually configured, set up automatically using 6PE 
("BGP-tunneling") between the border boxes, etc.  makes little 
difference.  It's very simple to provide v6 support across v4 core if 
your edge device supports v6 already.

So, as stated -- I'm having a lot of trouble figuring out the real 
applicability of this option, and I don't think we should go forward 
with it.  The danger is that it's more confusing than it's worth...

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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From dhcwg-admin@ietf.org  Fri Apr  9 12:12:29 2004
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From: "Bernie Volz" <volz@cisco.com>
To: <rbhibbs@pacbell.net>, "'Dhcwg'" <dhcwg@ietf.org>
Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-3315id-for-v4-02.txt + LAST CALL Comments
Date: Fri, 9 Apr 2004 12:07:20 -0400
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>...I'd prefer this work to be incorporated into a revision
>of RFC2132, rather than creating a new RFC that will
>probably be obsoleted shortly after publication, which also
>gives us the opportunity to more fully consider the ramifications
>of altering the semantics of the client identifier in the context
>of DHCP-DNS dynamic updates.

I would be against this because it will take significantly longer
(revising 2131/2132 will take a while to get through the IETF process).


- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Richard Barr Hibbs
Sent: Tuesday, April 06, 2004 1:07 PM
To: 'Dhcwg'
Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-3315id-for-v4-02.txt +
LAST CALL Comments



> -----Original Message-----
> From: Bernie Volz [mailto:volz@cisco.com]
> Sent: Tuesday, 06 April 2004 06:40
>
> I don't think a new option is such a good idea.
> If a new option is used, how does a client know
> when to send it or the 'old' client identifier
> option? This forces 'new' clients to send both -
> at least in the DISCOVER (older servers would
> not echo back the new option in the OFFER
> and new servers would could send back just the
> new option). This goes against your proposed
> text for 4.1, "but MUST NOT send both."
>
...although I believe that when you significantly change
both the syntax and semantics of an existing option it
should be recast as a new option, I'll relent on that
point...  I also seem to have failed the transition test by requiring
divine knowledge on the part of clients... oops....


> I'm also not completely happy with encoding the
> IAID and DUID in a single option.
>
> The main reason I don't like this is that it
> forces the server to do something that we don't
> really want it to do - pull apart the data in
> the client identifier option - the option data is
> no longer 'opaque'.  Note that it will be
> important for the DHCP server to do this for:
> 1. Dynamic DNS updates since the client
> identifier is only the DUID portion (see section
> 3.3 of draft-ietf-dnsext-dhcid-rr-07.txt).
> 2. Client based policies (ie, reservations) or
> limits, since these will want to look just at the
> DUID portion.
>
I strongly believe that the client identifier should remain opaque to
the server because to change the semantics is a significant change to
the operation of existing servers.


> But, there is an advantage to encoding the IAID
> and DUID in the option as it supports current
> DHCP server implementations. Without this, a
> client that has multiple interfaces (either
> connected to the same link or not) that are
> serviced by a single DHCP server might not get
> multiple addresses.
>
> I guess given the lesser of the two evils, I'm
> inclined to go along with the option as you've
> proposed it in the draft.
>
> So, I support this document moving forward.
>
...I'd prefer this work to be incorporated into a revision
of RFC2132, rather than creating a new RFC that will
probably be obsoleted shortly after publication, which also gives us the
opportunity to more fully consider the ramifications of altering the
semantics of the client identifier in the context of DHCP-DNS dynamic
updates.

--Barr


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From dhcwg-admin@ietf.org  Fri Apr  9 12:18:29 2004
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Date: Fri, 09 Apr 2004 12:11:42 -0400
From: "Kevin A. Noll" <kevin.noll@perfectorder.com>
Subject: RE: [dhcwg] dhc WG last call on draft-ietf-dhc-reclassify-options-00
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I support moving this ahead.

--kan--

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org]On Behalf Of
> Ralph Droms
> Sent: Monday, 05 April, 2004 8:46 AM
> To: dhcwg@ietf.org
> Subject: [dhcwg] dhc WG last call on
> draft-ietf-dhc-reclassify-options-00
>
>
> This message announces a WG last call on "Reclassifying DHCPv4 Options"
> <draft-ietf-dhc-reclassify-options-00>.  The last call will
> conclude at 5PM
> EST on 4/16/04.
>
> Please respond to this WG last call.  If you support acceptance of the
> document without change, respond with a simple acknowledgment, so that
> support for the document can be assessed.
>
> draft-ietf-dhc-reclassify-options-00 revises RFC 2132 to reclassify DHCPv4
> option codes 128 to 223 (decimal) as publicly defined options to
> be managed
> by IANA in accordance with RFC 2939. This document directs IANA to make
> these option codes available for assignment as publicly defined
> DHCP options
> for future options..  This draft is available as
> http://www.ietf.org/internet-drafts/draft-ietf-dhc-reclassify-opti
> ons-00.txt
>
> - Ralph Droms
>
>
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
>


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From dhcwg-admin@ietf.org  Fri Apr  9 12:18:29 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Kim Kinnear'" <kkinnear@cisco.com>, "'Ralph Droms'" <rdroms@cisco.com>,
        <dhcwg@ietf.org>
Subject: RE: [dhcwg] Security for leasequery messages
Date: Fri, 9 Apr 2004 12:10:32 -0400
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Seems like a good approach ... But will the IESG be happy with it?

Today, there's always the basic security of only allowing the requests
from specific addresses (and since it is the reply that has the
interesting information, spoofing the sender doesn't buy you that much).

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Kim Kinnear
Sent: Wednesday, April 07, 2004 4:38 PM
To: Ralph Droms; dhcwg@ietf.org
Cc: kkinnear@cisco.com
Subject: Re: [dhcwg] Security for leasequery messages



Folks,

This is clearly an issue, and there are no easy answers.
Here is one approach:

Nothing is mandatory to implement, since one approach is to ensure that
there is physical security between the access concentrator and the DHCP
server.

A better approach is to use some form of the not-yet-fully-baked relay
agent authentication.  For example:

http://www.ietf.org/internet-drafts/draft-ietf-dhc-auth-suboption-03.txt

but since this is still coming along, it can't be mandatory, that's for
sure.  We could wait to standardize leasequery until something was
approved for relay agent authentication, but that will further delay
something that has already undergone numerous delays.  There are large
number of similar-to-the-standard leasequery installations, and more
every day.  It would be nice to bring them all into compliance over
time, and time is getting away from us.

One approach would be to make something mandatory once that something
exists, which is a little odd but perhaps doable.  We might be able to
say:

        "When some form of relay-agent to DHCP server
        authentication becomes a standard, its use for leasequery
        becomes mandatory."

Something to consider.

Any other ideas for handle this one?

Cheers -- Kim

At 07:56 PM 4/6/2004, Ralph Droms wrote:
>The following issues relate to security for leasequery messages:
>
>Steve Bellovin:
>
>Discuss:
>(26 March 2004)
>The Security Considerations section says this:
>
>   DHCP servers SHOULD prevent exposure of location information
>   (particularly the mapping of hardware address to IP address lease,
>   which can be an invasion of broadband subscriber privacy) by
>   employing some form of relay agent authentication between the
>   DHCPLEASEQUERY client and the DHCP server.
>
>   Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
>   path to the DHCP server is secure.  Clients SHOULD use Relay Agent
>   Information security as a way to achieve this goal.
>
>What is "some form of ... authentication"?  What is "Relay Agent 
>Information security"?  Put another way, what is mandatory to 
>implement?
>
>Russ Housley:
>
>Discuss:
>  Section 7 says:
>  >
>  > DHCP servers SHOULD prevent exposure of location information
>  > (particularly the mapping of hardware address to IP address lease,
>  > which can be an invasion of broadband subscriber privacy) by
>  > employing some form of relay agent authentication between the
>  > DHCPLEASEQUERY client and the DHCP server.
>  >
>  There needs to be more discussion of the authentication requirements.
>  I would prefer the specification to name a mandatory-to-implement
>  mechanism, but that may be asking too much.
>
>  Section 7 also says:
>  >
>  > Clients of the DHCPLEASEQUERY message SHOULD ensure that their data

> > path to the DHCP server is secure.  >
>  What security services are needed?  Integrity, authentication, access
>  control, replay protection confidentiality?  The hint about Relay
Agent
>  Information security, with no reference, is not sufficient.
>
>
>
>_______________________________________________
>dhcwg mailing list
>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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From dhcwg-admin@ietf.org  Fri Apr  9 12:34:29 2004
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From: "Wijnen, Bert (Bert)" <bwijnen@lucent.com>
To: Bernie Volz <volz@cisco.com>, dhcwg@ietf.org, iesg@ietf.org
Subject: RE: [dhcwg] Should the leasequery spec explicitly be IPv4-specifi
	c?
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Fine by me. SO let us add a few lines that states this
ecplicitly in the document.

The v6Ops WG just wnet through all RFCs to list which ones
are IPv6 hostile/unfriendly. 
So if we approve any new documents that are specific for IPv4
only, let us then add a few words that say so and explain
why, so that this is clear in the future.


Thanks,
Bert 

> -----Original Message-----
> From: Bernie Volz [mailto:volz@cisco.com]
> Sent: donderdag 8 april 2004 22:04
> To: dhcwg@ietf.org; iesg@ietf.org
> Subject: RE: [dhcwg] Should the leasequery spec explicitly be
> IPv4-specific?
> 
> 
> YES!
> 
> As this specification deals with DHCPv4 (is extends DHCPv4), it should
> be IPv4 specific.
> 
> It is a separate issue as to whether corresponding 
> functionality will be
> needed for DHCPv6 and something that the WG should take up.
> 
> - Bernie
> 
> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
> Ralph Droms
> Sent: Tuesday, April 06, 2004 8:25 PM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Should the leasequery spec explicitly be 
> IPv4-specific?
> 
> 
> Bert Wijnen:
> 
> Discuss:
> - It seems to be implicitly IPv4 specific without 
> explaining/justifying
> why
>    and uses "IP address" to mean IPv4 addresses only. Do we not want
> them
>    to either be IPv4/v6 agnostic or to be specific in stating 
> that they
>    are IPv4 only if such is the case and justified?
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 
> 

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From dhcwg-admin@ietf.org  Fri Apr  9 12:37:28 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Kim Kinnear'" <kkinnear@cisco.com>, "'Ralph Droms'" <rdroms@cisco.com>,
        <dhcwg@ietf.org>
Subject: RE: [dhcwg] Restrictions of information flow in leasequery  messages
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Kim:

I agree with you - this information is generally available.

Perhaps a solution is that a server always has the option of not
returning data it considers too sensitive - such as GEOPRIV information.
Perhaps something like the following should be added to the Security
Considerations:

   In some environments it may be appropriate to configure a DHCP server
   with option numbers that MUST not be returned in response to
   DHCPLEASEQUERY messages because these options are considered to
contain
   sensitive information.

I do think that once security options exists for relay to server
communication, if this was a concern at a site, the site should use
those options (and restrict who the server responds to for a
DHCPLEASEQUERY).

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Kim Kinnear
Sent: Thursday, April 08, 2004 4:52 PM
To: Ralph Droms; dhcwg@ietf.org
Cc: kkinnear@cisco.com
Subject: Re: [dhcwg] Restrictions of information flow in leasequery
messages


At 08:16 PM 4/6/2004, Ralph Droms wrote:
>Ted Hardie:
>
>Discuss:
>This whole method has "invitation to mischief" printed in large, block 
>letters across its shirt.  After being told repeatedly that there is no

>restriction on the use cases for this mechanism, this text:
>
>        For this query, the requester supplies only an IP address in
the
>        DHCPLEASEQUERY message.  The DHCP server will return any
>        information that it has on the most recent client to have been
>        assigned that IP address.
>
>sets off lots of alarm bells.  If I read this right, *any information* 
>associated with that IP address is returned?  If information used to 
>construct a location object is present (as in the geopriv dhcp-li 
>draft), that would get returned? That seems kind of excessive for an 
>access concentrator, but very, very nice for a black hat.  This whole 
>section on Parameter Request List options:
>
>        The Parameter Request List option (option 55) SHOULD be set to
>        the options of interest to the requester.  The interesting
>        options are likely to include the IP Address Lease Time option
>        (option 51), the Relay Agent Information option (option 82) and
>        possibly the Vendor class identifier option (option 60).  In
the
>        absence of a Parameter Request List option, the server SHOULD
>        return the same options it would return for a DHCPREQUEST
>        message which didn't contain a DHCPLEASEQUERY message, which
>        includes those mandated by [RFC 2131, Section 4.3.1] as well as
>        any options which the server was configured to always return to
>        a client.
>
>has no restrictions of any type on the return of any data.  Why is all 
>of this data being made available via this method?

        I suppose because all of this data is already available on
        the wire (and sometimes broadcast) if you just watch it 
        go by.  Of course, you have to *be* on the wire to see it
        that way.

        What do the rest of you think about this issue?

        Cheers -- Kim


>It's too bad that SNMP is off the table here, as that would give you a 
>realistic way to limit data to specific queries and queriers.
>
>Limiting the protocol to a very specific use that fits the demonstrated

>need seems like it would make getting the security mechanisms right 
>easier; if this is meant to be truly general purpose, it needs a 
>general purpose mechanism that would give it the same level of security

>as SNMP would for this same purpose.
>
>
>_______________________________________________
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>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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From dhcwg-admin@ietf.org  Fri Apr  9 12:45:31 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Pekka Savola'" <pekkas@netcore.fi>, "'Ralph Droms'" <rdroms@cisco.com>
Cc: <dhcwg@ietf.org>
Subject: RE: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
Date: Fri, 9 Apr 2004 12:38:47 -0400
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I guess the solution is to ask the authors to add specific examples
of the environments in which this option will be used, if they still
feel
this option is needed.

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Pekka Savola
Sent: Friday, April 09, 2004 10:51 AM
To: Ralph Droms
Cc: dhcwg@ietf.org
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01


On Fri, 9 Apr 2004, Ralph Droms wrote:
> My apologies for thoroughly confusing the conversation...

No problem :)

> So, let's leave draft-daniel-dhc-ipv6in4-opt-02 out of this discussion

> for the moment.  Back to the scenario you asked about...I can imagine 
> (if you'll give me a moment of suspension-of-disbelief) that an ISP 
> might want to provide IPv6/linklocal service between the service 
> provider's edge router and the customer routers, without going to full

> IPv6 connectivity in its core.  In that scenario, the customer router 
> could use DHCPv6 to obtain a prefix and a tunnel endpoint from a 
> server in the service provider's edge router, while needing the tunnel

> for full external IPv6 connectivity.
> 
> But that does seem like a far-fetched scenario...

Yes, it's very far-fetched, because in this specific scenario:

 1) the access network is usually the most difficult part to get 
native v6, and

 2) it's much simpler for all the concerned parties for the ISP to use 
internal tunneling to bridge the gaps in its core network.  Whether 
these tunnels are manually configured, set up automatically using 6PE 
("BGP-tunneling") between the border boxes, etc.  makes little 
difference.  It's very simple to provide v6 support across v4 core if 
your edge device supports v6 already.

So, as stated -- I'm having a lot of trouble figuring out the real 
applicability of this option, and I don't think we should go forward 
with it.  The danger is that it's more confusing than it's worth...

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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From dhcwg-admin@ietf.org  Fri Apr  9 13:00:39 2004
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To: "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] dhc WG last call on  draft-ietf-dhc-reclassify-options-00
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Ralph:

Thanks for the comments and I've got the updated version ready to go -
but will wait for additional comments during the WG Last Call.

Reminder to WG: this document and several others are in last call which
ends 5PM EST on 4/16/04.

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ralph Droms
Sent: Thursday, April 08, 2004 8:38 AM
To: dhcwg@ietf.org
Subject: Re: [dhcwg] dhc WG last call on
draft-ietf-dhc-reclassify-options-00


This document reflects WG consensus on how to make more DHCP option
codes available to avoid exhaustion of the option code space.

Although there are known uses of option codes in the range 128-254 (both
documented and undocumented), the procedure described in this document
provides a way to avoid clashes in the use of reclassified options.

Editorial suggestions and comments:

The references should be listed as Normative and Informative.

Section 3, change the first sentence to: "The DHCP option space (0-255)
is divided into two ranges [RFC2132]:"

Reference [unused-optioncodes] has been published as RFC 3679.

The document should include boilerplate from RFC 3667 when it is
revised.


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From dhcwg-admin@ietf.org  Fri Apr  9 13:37:34 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] Revised charter
Date: Fri, 9 Apr 2004 13:33:31 -0400
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Ralph:

The draft charter great!

One minor issue - you might want to make the list elements consistent.
Some start out with an action, others give a description first and then
the actions. To scan the list quickly, it might be nice if they all
started with actions. But, this is very minor and completely your
choice.

- Bernie


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From dhcwg-admin@ietf.org  Fri Apr  9 13:38:29 2004
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Subject: Re: [dhcwg] Security for leasequery messages
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Is IPSec for DHCP relay to server communication any more fully baked?  Isn't 
that draft just documenting what is already possible, rather than proposing 
something new?

Wouldn't another approach be to use RFC 3118?  In this case, we aren't talking 
about relayed messages, we're talking about directed messages from a 
relay/access concentrator to the server (and back), with non-zero giaddr.  Seems 
to me there's no reason RFC 3118 couldn't secure these messages based on shared 
secret.

Bernie Volz wrote:

> Seems like a good approach ... But will the IESG be happy with it?
> 
> Today, there's always the basic security of only allowing the requests
> from specific addresses (and since it is the reply that has the
> interesting information, spoofing the sender doesn't buy you that much).
> 
> - Bernie
> 
> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
> Kim Kinnear
> Sent: Wednesday, April 07, 2004 4:38 PM
> To: Ralph Droms; dhcwg@ietf.org
> Cc: kkinnear@cisco.com
> Subject: Re: [dhcwg] Security for leasequery messages
> 
> 
> 
> Folks,
> 
> This is clearly an issue, and there are no easy answers.
> Here is one approach:
> 
> Nothing is mandatory to implement, since one approach is to ensure that
> there is physical security between the access concentrator and the DHCP
> server.
> 
> A better approach is to use some form of the not-yet-fully-baked relay
> agent authentication.  For example:
> 
> http://www.ietf.org/internet-drafts/draft-ietf-dhc-auth-suboption-03.txt
> 
> but since this is still coming along, it can't be mandatory, that's for
> sure.  We could wait to standardize leasequery until something was
> approved for relay agent authentication, but that will further delay
> something that has already undergone numerous delays.  There are large
> number of similar-to-the-standard leasequery installations, and more
> every day.  It would be nice to bring them all into compliance over
> time, and time is getting away from us.
> 
> One approach would be to make something mandatory once that something
> exists, which is a little odd but perhaps doable.  We might be able to
> say:
> 
>         "When some form of relay-agent to DHCP server
>         authentication becomes a standard, its use for leasequery
>         becomes mandatory."
> 
> Something to consider.
> 
> Any other ideas for handle this one?
> 
> Cheers -- Kim
> 
> At 07:56 PM 4/6/2004, Ralph Droms wrote:
> 
>>The following issues relate to security for leasequery messages:
>>
>>Steve Bellovin:
>>
>>Discuss:
>>(26 March 2004)
>>The Security Considerations section says this:
>>
>>  DHCP servers SHOULD prevent exposure of location information
>>  (particularly the mapping of hardware address to IP address lease,
>>  which can be an invasion of broadband subscriber privacy) by
>>  employing some form of relay agent authentication between the
>>  DHCPLEASEQUERY client and the DHCP server.
>>
>>  Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
>>  path to the DHCP server is secure.  Clients SHOULD use Relay Agent
>>  Information security as a way to achieve this goal.
>>
>>What is "some form of ... authentication"?  What is "Relay Agent 
>>Information security"?  Put another way, what is mandatory to 
>>implement?
>>
>>Russ Housley:
>>
>>Discuss:
>> Section 7 says:
>> >
>> > DHCP servers SHOULD prevent exposure of location information
>> > (particularly the mapping of hardware address to IP address lease,
>> > which can be an invasion of broadband subscriber privacy) by
>> > employing some form of relay agent authentication between the
>> > DHCPLEASEQUERY client and the DHCP server.
>> >
>> There needs to be more discussion of the authentication requirements.
>> I would prefer the specification to name a mandatory-to-implement
>> mechanism, but that may be asking too much.
>>
>> Section 7 also says:
>> >
>> > Clients of the DHCPLEASEQUERY message SHOULD ensure that their data
> 
> 
>>>path to the DHCP server is secure.  >
>>
>> What security services are needed?  Integrity, authentication, access
>> control, replay protection confidentiality?  The hint about Relay
> 
> Agent
> 
>> Information security, with no reference, is not sufficient.
>>
>>
>>
>>_______________________________________________
>>dhcwg mailing list
>>dhcwg@ietf.org
>>https://www1.ietf.org/mailman/listinfo/dhcwg
> 
> 
> 
> _______________________________________________
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> 
> 
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-- 
=====================================================================
Josh Littlefield                                  Cisco Systems, Inc.
joshl@cisco.com                             1414 Massachusetts Avenue
tel: 978-936-1379  fax: same               Boxborough, MA  01719-2205

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From dhcwg-admin@ietf.org  Fri Apr  9 13:59:29 2004
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To: Ralph Droms <rdroms@cisco.com>
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Subject: Re: [dhcwg] *DRAFT* minutes from WG meeting in Seoul (2nd try) 
In-reply-to: Mail from Ralph Droms <rdroms@cisco.com> 
 dated Fri, 26 Mar 2004 10:37:58 EST
 <4.3.2.7.2.20040326103738.01fa1bd8@flask.cisco.com> 
Date: Fri, 09 Apr 2004 10:56:39 -0700
From: Naiming Shen <naiming@redback.com>
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Ralph,

 ] 
 ] Micro-block IP Addr. Alloc. With DHCP Proxy Server
 ]    <draft-shen-dhc-block-alloc-01>
 ]    Accept as WG work item?
 ] 
 ]    The author gave a short presentation about the option.  It fits in
 ]    dhc WG charter under "address assignment".  The chair will arrange
 ]    for a discussion to reconcile this option with DHCPv6 prefix
 ]    delegation and earlier ODAP work.  The draft was not accepted as WG
 ]    work item at this time.
 ] 

I don't see how this draft fits into the new charter you just
posted, and also can you arrange a discussion as mentioned in the
Seoul meeting minutes? 

thanks.
- Naiming

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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: DHCP Subscriber ID Suboption for the DHCP Relay Agent Option
	Author(s)	: R. Johnson,  et al.
	Filename	: draft-ietf-dhc-subscriber-id-06.txt
	Pages		: 10
	Date		: 2004-4-9
	
This memo defines a new Subscriber-ID suboption for the Dynamic Host
   Configuration Protocol's (DHCP) relay agent information option. The
   suboption allows a DHCP relay agent to associate a stable
   'Subscriber-ID' with DHCP client messages in a way that is
   independent of the client and of the underlying physical network
   infrastructure.

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Date: Sat, 10 Apr 2004 08:40:35 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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Ok, we need to make it more clear, so I will show
my thought soon whether or not to be considered
in the DHC.

Regards

- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Bernie Volz
> Sent: Saturday, April 10, 2004 1:39 AM
> To: 'Pekka Savola'; 'Ralph Droms'
> Cc: dhcwg@ietf.org
> Subject: RE: [dhcwg] applicability of 
> draft-ietf-dhc-dhcpv6-ctep-opt-01
> 
> 
> I guess the solution is to ask the authors to add specific examples
> of the environments in which this option will be used, if they still
> feel
> this option is needed.
> 
> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
> Pekka Savola
> Sent: Friday, April 09, 2004 10:51 AM
> To: Ralph Droms
> Cc: dhcwg@ietf.org
> Subject: Re: [dhcwg] applicability of 
> draft-ietf-dhc-dhcpv6-ctep-opt-01
> 
> 
> On Fri, 9 Apr 2004, Ralph Droms wrote:
> > My apologies for thoroughly confusing the conversation...
> 
> No problem :)
> 
> > So, let's leave draft-daniel-dhc-ipv6in4-opt-02 out of this 
> discussion
> 
> > for the moment.  Back to the scenario you asked about...I 
> can imagine 
> > (if you'll give me a moment of suspension-of-disbelief) that an ISP 
> > might want to provide IPv6/linklocal service between the service 
> > provider's edge router and the customer routers, without 
> going to full
> 
> > IPv6 connectivity in its core.  In that scenario, the 
> customer router 
> > could use DHCPv6 to obtain a prefix and a tunnel endpoint from a 
> > server in the service provider's edge router, while needing 
> the tunnel
> 
> > for full external IPv6 connectivity.
> > 
> > But that does seem like a far-fetched scenario...
> 
> Yes, it's very far-fetched, because in this specific scenario:
> 
>  1) the access network is usually the most difficult part to get 
> native v6, and
> 
>  2) it's much simpler for all the concerned parties for the 
> ISP to use 
> internal tunneling to bridge the gaps in its core network.  Whether 
> these tunnels are manually configured, set up automatically using 6PE 
> ("BGP-tunneling") between the border boxes, etc.  makes little 
> difference.  It's very simple to provide v6 support across v4 core if 
> your edge device supports v6 already.
> 
> So, as stated -- I'm having a lot of trouble figuring out the real 
> applicability of this option, and I don't think we should go forward 
> with it.  The danger is that it's more confusing than it's worth...
> 
> -- 
> Pekka Savola                 "You each name yourselves king, yet the
> Netcore Oy                    kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 
> 
> _______________________________________________
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> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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Date: Sat, 10 Apr 2004 09:08:42 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] Revised charter
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> Can you give us more details?  What problems would we
> consider as part of mobility support in DHCP?

Well, I think it's not problem but restriction in DHCP. 
I guess current DHCP architecture is not concretely 
matched to the mobility because of long round-trips 
to get IP address and related information. Above all 
DHCP is a natural choice in the Wireless Lan (802.11) 
in conjunction with Access Point (AP), thus I think it's 
worth discussing this with dhc folks.

It's [Introduction] [Background] [Design Goals]
sections of preparing draft for your information and it 
will be available soon.

Hope this helps.



1. Introduction 
      
The world has become increasingly mobile. As a result,
traditional ways of networking the world have proven 
inadequate to meet the challenges posed by our new 
collective lifestyle.  Wireless technology has been 
successful because it enables people to connect with each
other regardless of location and the most successful 
wireless networking technology this far has been 802.11 
WLAN [802.11][WLAN]. 
      
Regarding the wireless technology, DHCP [RFC 2131] 
is widely used for obtaining the network configuration on
the mobile node such as its unique IP address and others
in the local networks.  DHCP is useful with access point 
which generally includes a DHCP server because it 
minimizes mobile node configuration.  The DHCP server 
(access point) can be allocated a pool of addresses.  The 
administrator specifies both the DHCP based address and 
the size of the pool.  The DHCP server (access point) can 
also be configured to hand out a default gateway and DNS 
server information. 
      
The main objective of this draft is to propose a new architecture
of DHCP to support the mobility on the DHCP client as mobile 
node.  Also fast network attachment mechanism should be 
considered in conjunction with the mobile IP [RFC 3220] [MIP6] 
which allows a mobile node to move from one link to another 
without changing the mobile node's "home address".  Packets 
may be routed to the mobile node using this address regardless
of the mobile node's current point of attachment to the Internet.  
The mobile node may also continue to communicate with other
nodes (stationary or mobile) after moving to a new link.  The 
movement of a mobile node away from its home link is thus 
transparent to transport and higher-layer protocols and 
applications. 
      
The aim of this draft is neither network information such as 
DNS nor fast handover mechanism [FH802.11]. 


3. Background 

The aim of this draft is to discuss mobility issue in the
DHCP environment and it is especially appropriate for 
processes and devices which already interpret DHCP
messages.   
      
In particular, a new proposed architecture allow DHCP 
server to send available IP addresses to DHCP client 
quickly to attach a new network when in motion. 
      
Placing DHCP server on the access point is a natural 
choice in the 802.11 wireless environment. 
      
The Unsolicited message is an extension to the DHCP 
protocol. 
      
The main purpose of this draft is to provide a starting 
point of mobility issue in the DHC Working Group. 
      
      
4. Design Goals 
      
The goal of this draft is to provide a lightweight mechanism
for supporting mobility in the DHCP environment.  It is 
designed to optimize current DHCP mechanism to cut 
down number of round-trips between DHCP client and 
DHCP server. 
      
Here are some requirements why this design is required. 
      
[1] Wireless technologies especially 802.11 are widely 
spread in the DHCP environment, thus fast network 
attachment is importantly required on the DHCP client 
when in motion. 
      
[2] Current 4-messages exchange is not matched for
the mobility. 
  
[3] Effectively this design aims outperforming rapid 
commit technique by substituting the explicit DHCP 
operation with the implicit link-layer association event. 
      
[4] DHCP server functionality is common on the access
point. 
      
[5] For supporting mobility on the current DHCP protocol, 
minimal additional configuration/requirement is required. 







- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 



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Date: Sat, 10 Apr 2004 09:13:26 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] dhc WG last call on  draft-ietf-dhc-rapid-commit-opt-00
In-reply-to: <4.3.2.7.2.20040408090911.02af0ed8@flask.cisco.com>
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Ralph, thanks your editorial comments on 
this draft and as Bernie indicated, I will also 
wait for additional comments during the WGLC.

Regarding IPR comment, I have no any hard
stance. Anyway I will also show a concrete
statement on that after WGLC.



- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Ralph Droms
> Sent: Thursday, April 08, 2004 10:21 PM
> To: dhcwg@ietf.org
> Subject: Re: [dhcwg] dhc WG last call on 
> draft-ietf-dhc-rapid-commit-opt-00
> 
> 
> I see that this draft includes a notice regarding IPR.  The 
> Samsung IPR
> statement appears to apply across all IETF submissions.  Can 
> the authors
> clarify if there are any IPR claims that apply specifically 
> to this document?
> 
> The format of the option - specifically, option length == 0 - 
> is consistent
> with other DHCP options.  Will length 0 cause problems in 
> practice with
> deployed DHCP servers?
> 
> The document should be republished to include RFC 3667 boilerplate,
> including the RFC 3667 IPR notification statement.
> 
> I have one editorial comment: the document should indicate 
> that the use of
> Rapid Commit is optional on the part of the client, under 
> local (client)
> admin control.  In section 3, I suggest changing the first sentence:
> 
>       A client that supports the Rapid Commit option SHOULD 
> include it in
>       DHCPDISCOVER messages that it sends.
> 
> to:
> 
>       If a client that supports the Rapid Commit option intends to use
>       the rapid commit capability, it includes a Rapid Commit 
> option in
>       DHCPDISCOVER messages that it sends.
> 
> In section 3.1, list item 1, I suggest changing the first sentence:
> 
>          1. The client broadcasts a DHCPDISCOVER message on its local
>             physical subnet and  SHOULD include the Rapid 
> Commit option if
>             it supports this option.
> 
> to:
> 
>          1. The client broadcasts a DHCPDISCOVER message on its local
>             physical.  If the client supports the Rapid Commit option
>             and intends to use the rapid commit capability, 
> it includes
>             a Rapid Commit option in the DHCPDISCOVER message.
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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From dhcwg-admin@ietf.org  Fri Apr  9 23:53:33 2004
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From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] I-D ACTION:draft-ietf-dhc-3315id-for-v4-02.txt + LAST CALL Comments
Date: Fri, 9 Apr 2004 20:49:46 -0700
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On Apr 9, 2004, at 9:07 AM, Bernie Volz wrote:
> I would be against this because it will take significantly longer
> (revising 2131/2132 will take a while to get through the IETF process).

Yup, I agree with Bernie on this.   I don't think we should think of 
the RFC2131/2132 revision something that's going to happen quickly.   
Of course we should try to do it in a timely fashion, but we shouldn't 
expect that we will definitely succeed.   Look at how hard it's been to 
make leasequery, a fairly straightforward extension, happen.   :'/



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From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] Security for leasequery messages
Date: Fri, 9 Apr 2004 20:52:52 -0700
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On Apr 9, 2004, at 10:35 AM, Josh Littlefield wrote:
> Wouldn't another approach be to use RFC 3118?  In this case, we aren't 
> talking about relayed messages, we're talking about directed messages 
> from a relay/access concentrator to the server (and back), with 
> non-zero giaddr.  Seems to me there's no reason RFC 3118 couldn't 
> secure these messages based on shared secret.

That's a good point - RFC3118 is actually a credible answer to the 
problem of securing server<->concentrator communication, because in 
most cases it is not a problem to use one or only a few shared keys in 
this context, where it's completely lame to do so in the context of a 
large set of DHCP end-users.


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<p class=MsoNormal><span lang=EN-US 
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</div>


jxqdjubemxmembvt


From dhcwg-admin@ietf.org  Mon Apr 12 11:58:31 2004
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This message is a reminder of the WG last call on "Vendor-Identifying Vendor
Options for DHCPv4" <draft-ietf-dhc-vendor-01>.  The last call will conclude
at 5PM on 4/16/04.

There has been one response to the last call.  Although the document will be
revised and go through another WG last call, respond now if you have
additional comments, so all of the necessary revisions can be made at once.

- Ralph Droms


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From dhcwg-admin@ietf.org  Mon Apr 12 11:58:32 2004
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This message is a reminder of the WG last call on "Node-Specific Client
Identifiers for DHCPv4" <draft-ietf-dhc-3315id-for-v4-01>.  The last call
will conclude at 5PM on 4/16/04.

There has been discussion of this draft during the WG last call.  However,
it is not yet possible to judge consensus on issues raised in
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03283.html
and followup messages in the same thread.  If you have comments on this
specification, please send your input to the mailing list.

- Ralph Droms 


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From dhcwg-admin@ietf.org  Mon Apr 12 12:07:30 2004
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 draft-ietf-dhc-reclassify-options-00
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This message is a reminded of the WG last call on "Reclassifying DHCPv4
Options" <draft-ietf-dhc-reclassify-options-00>.  The last call will
conclude at 5PM EST on 4/16/04.

Please respond to this WG last call.  If you support acceptance of the
document without change, respond with a simple acknowledgment, so that
support for the document can be assessed.

- Ralph Droms


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From dhcwg-admin@ietf.org  Mon Apr 12 12:19:29 2004
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Date: Mon, 12 Apr 2004 12:14:46 -0400
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Subject: [dhcwg] Reminder! Revised charter
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Here is a draft charter for the WG, based on discussion at the WG meeting in
Seoul and discussion on the mailing list.  Please review and respond with
comments.

- Ralph

dhc WG draft revised charter
----------------------------

The dhc working group (DHC WG) has developed DHCP for automated
allocation, configuration and management of IP addresses and TCP/IP
protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
is documented in RFC2131 and RFC2132.  DHCPv6 is currently a "Proposed
Standard" and is documented in RFC3315.  Subsequent RFCS document
additional options and other enhancements to the specifications.

The DHC WG is responsible for reviewing (and sometimes developing)
DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
is expected to review all proposed extensions to DHCP to ensure that
they are consistent with the DHCP specification and other option
formats, that they do not duplicate existing mechanisms, etc. The DHC
WG will not (generally) be responsible for evaluating the semantic
content of proposed options. The DHC WG will not adopt new proposals
for extensions to DHCP as working group documents without first
coordinating with other relevant working groups and determining who
has the responsibility for reviewing the semantic content of an
option.

The DHC WG has the following main objectives:

* The DHC WG will address security in DHCP

    o Develop and document security requirements for DHCP. RFC 3118
      defines current security mechanisms for DHCPv4. Unfortunately, RFC
      3118 has neither been implemented nor deployed to date.  Specific
      issues to be considered include:

      - Improved key management and scalability

      - Security for messages passed between relay agents and servers

      - Threats of DoS attacks through FORCERENEW

      - The increased usage of DHC on unsecured (e.g., wireless) and
        public LANs

      - The need for clients to be able to authenticate servers, without
        simultaneously requiring client authentication by the server.

    o Develop and document a roadmap of any new documents or protocols
      needed to meet the security requirements for DHCP

* Write an analysis of the DHCP specification, including RFC2131,
    RFC2132 and other RFCs defining additional options, which identifies
    ambiguities, contradictory specifications and other obstacles to
    development of interoperable implementations. Recommend a process
    for resolving identified problems and incorporating the resolutions
    into the DHCP specification.

* Hosts that include implementations of both IPv4 and IPv6
    ("dual-stack hosts") may use DHCP to obtain configuration settings
    (including assigned addresses) for both IPv4 and IPv6.  The DHCPv4
    and DHCPv6 specifications (RFC2131, RFC2132, RFC3315 and subsequent
    RFCs) do not explicitly explain how a dual-stack host uses DHCP to
    obtain configuration settings for both IP stacks. The dhc WG will
    assess the requirements for a dual-stack host to use DHCP to obtain
    configuration settings for both IPv4 and IPv6, review alternative
    solutions and select a solution, and develop, review and publish a
    document that defines the chosen solution.

* The DHCPv6 specification in RFC3315 includes a mechanism through
    which clients can obtain other configuration information without
    obtaining an address or addresses.  This mechanisms is sometimes
    called "stateless DHCPv6".  RFC3315 includes no provision for
    notifying DHCPv6 clients using stateless DHCPv6 of changes in the
    configuration information supplied to the client or any
    recommendations as to when a client should obtain possibly updated
    information.  The dhc WG will assess the requirements for informing
    DHCPv6 clients of changes in configuration information, review
    alternative solutions and select a solution, and develop, review and
    publish a specification for the chosen solution.


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From dhcwg-admin@ietf.org  Mon Apr 12 12:46:20 2004
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This message is a reminder of the WG last call on "DHCP Option for Proxy
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- Ralph Droms


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From dhcwg-admin@ietf.org  Mon Apr 12 13:56:33 2004
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From: "Bernie Volz" <volz@cisco.com>
To: <dhcwg@ietf.org>, <ksenthil@india.hp.com>
Subject: RE: [dhcwg] dhc WG last call on draft-ietf-dhc-proxyserver-opt-00
Date: Mon, 12 Apr 2004 13:52:32 -0400
Organization: Cisco
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Perhaps this has been discussed in the past and discarded, but what
about removing the need for yet-another-list? If the option where
changed not to use sub-options at all but instead carried tuples of:
	2-octets of well-known protocol number
	4-octets of proxy server internet address
	2-octets of proxy server port number
The option length would then be multiples of 8 bytes.

For example:
	Option Header:	TBD-option-code,24-bytes
	Proxy for HTTP:	80,http-proxy-server-1,8080
	Proxy for HTTP:	80,http-proxy-server-2,8080
	Proxy for FTP:	21,ftp-proxy-server-1,21

This avoids the need for future protocols to have an enumeration and the
current "getservicename" calls can be used to find the port numbers.

Otherwise, I recommend moving this draft forward.

- Bernie
-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ted Lemon
Sent: Wednesday, April 07, 2004 1:57 PM
To: dhcwg@ietf.org
Subject: Re: [dhcwg] dhc WG last call on
draft-ietf-dhc-proxyserver-opt-00


I have a bunch of suggested changes to this draft, which fall into 
three categories:

1. A single change to the protocol itself.
2. Editorial changes - I think there was some extra text in this draft 
explaining proxy servers that isn't needed, and generate questions 
during the IESG review, so I'm suggesting that it be deleted.
3. Copyediting.   There were some minor spelling and grammatical errors.

The change to the protocol is that it currently specifies an 
encapsulation of suboptions, like option 82, but allows for the 
appearance of multiple suboptions, which is different than the behavior 
specified for handling options in RFC3396.   This is not a huge 
problem, but it probably requires additional code in DHCP servers and 
clients that isn't necessary, so I'd suggest changing it so that if you 
want to specify multiple proxy servers for the same protocol, you 
should just list more than one IP address/port tuple in the suboption 
for that protocol.

I've enclosed a diff for all the changes.



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From dhcwg-admin@ietf.org  Mon Apr 12 14:14:30 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-vendor-01
Date: Mon, 12 Apr 2004 14:09:54 -0400
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I support this draft moving forward.

Back at the end of February, I had posted
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03177.
html but as there was no interest in this, I remove that suggestion.

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ralph Droms
Sent: Monday, April 12, 2004 11:42 AM
To: dhcwg@ietf.org
Subject: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-vendor-01


This message is a reminder of the WG last call on "Vendor-Identifying
Vendor Options for DHCPv4" <draft-ietf-dhc-vendor-01>.  The last call
will conclude at 5PM on 4/16/04.

There has been one response to the last call.  Although the document
will be revised and go through another WG last call, respond now if you
have additional comments, so all of the necessary revisions can be made
at once.

- Ralph Droms


_______________________________________________
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dhcwg@ietf.org
https://www1.ietf.org/mailman/listinfo/dhcwg


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From dhcwg-admin@ietf.org  Mon Apr 12 14:20:29 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-rapid-commit-opt-00 - shouldn't it be -01?
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FYI - The current version this draft is
draft-ietf-dhc-rapid-commit-opt-01.txt. Being one of the co-authors (and
subject to making the changes Ralph requested on 4/8), I support this
moving forward.

- Bernie

-----Original Message-----
From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
Ralph Droms
Sent: Monday, April 12, 2004 11:49 AM
To: dhcwg@ietf.org
Subject: [dhcwg] Reminder! dhc WG last call on
draft-ietf-dhc-rapid-commit-opt-00


This message is a reminder of the WG last call on "Rapid Commit Option
for DHCPv4" <draft-ietf-dhc-rapid-commit-opt-00>.  The last call will
conclude at 5PM EST on 4/15/04.

There has been only one response to the last call.  Although the
document will be revised, respond now if you have additional comments,
so all of the necessary revisions can be made at once.

- Ralph Droms


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From dhcwg-admin@ietf.org  Mon Apr 12 23:21:32 2004
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From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp>
To: Ralph Droms <rdroms@cisco.com>
Cc: dhcwg@ietf.org
Subject: Re: [dhcwg] Reminder! Revised charter
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>>>>> On Mon, 12 Apr 2004 12:14:46 -0400, 
>>>>> Ralph Droms <rdroms@cisco.com> said:

> Here is a draft charter for the WG, based on discussion at the WG meeting in
> Seoul and discussion on the mailing list.  Please review and respond with
> comments.

I can only see differences in indentation margin between this one and
the one you sent on Apr. 7th...is that intentional?

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp

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From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp>
To: Pekka Savola <pekkas@netcore.fi>
Cc: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org
Subject: Re: [dhcwg] applicability of draft-ietf-dhc-dhcpv6-ctep-opt-01
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>>>>> On Fri, 9 Apr 2004 17:51:03 +0300 (EEST), 
>>>>> Pekka Savola <pekkas@netcore.fi> said:

> Yes, it's very far-fetched, because in this specific scenario:

>  1) the access network is usually the most difficult part to get 
> native v6, and

>  2) it's much simpler for all the concerned parties for the ISP to use 
> internal tunneling to bridge the gaps in its core network.  Whether 
> these tunnels are manually configured, set up automatically using 6PE 
> ("BGP-tunneling") between the border boxes, etc.  makes little 
> difference.  It's very simple to provide v6 support across v4 core if 
> your edge device supports v6 already.

> So, as stated -- I'm having a lot of trouble figuring out the real 
> applicability of this option, and I don't think we should go forward 
> with it.  The danger is that it's more confusing than it's worth...

FWIW, I tend to agree with you here.  But, apparently the authors are
now trying to clarify the applicability, so I'm open to listening to
it.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp

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From dhcwg-admin@ietf.org  Mon Apr 12 23:39:28 2004
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From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] Reminder! Revised charter
Cc: dhcwg@ietf.org
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I had intended to resend the original message about the charter - I don't 
know why the indentation changed.

I've included belowa revised version with the edits you suggested and a few 
other minor editorial changes.

- Ralph

At 10:57 AM 4/13/2004 +0900, JINMEI Tatuya / 
=?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= wrote:
> >>>>> On Mon, 12 Apr 2004 12:14:46 -0400,
> >>>>> Ralph Droms <rdroms@cisco.com> said:
>
> > Here is a draft charter for the WG, based on discussion at the WG 
> meeting in
> > Seoul and discussion on the mailing list.  Please review and respond with
> > comments.
>
>I can only see differences in indentation margin between this one and
>the one you sent on Apr. 7th...is that intentional?
>
>                                         JINMEI, Tatuya
>                                         Communication Platform Lab.
>                                         Corporate R&D Center, Toshiba Corp.
>                                         jinmei@isl.rdc.toshiba.co.jp



The dhc working group (DHC WG) has developed DHCP for automated
allocation, configuration and management of IP addresses and TCP/IP
protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
is documented in RFC 2131 and RFC 2132.  DHCPv6 is currently a
"Proposed Standard" and is documented in RFC 3315.  Subsequent RFCs
document additional options and other enhancements to the
specifications.

The DHC WG is responsible for reviewing (and sometimes developing)
DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
is expected to review all proposed extensions to DHCP to ensure that
they are consistent with the DHCP specification and other option
formats, that they do not duplicate existing mechanisms, etc. The DHC
WG will not (generally) be responsible for evaluating the semantic
content of proposed options. The DHC WG will not adopt new proposals
for extensions to DHCP as working group documents without first
coordinating with other relevant working groups and determining who
has the responsibility for reviewing the semantic content of an
option.

The DHC WG has the following main objectives:

* The DHC WG will address security in DHCP

   o Develop and document security requirements for DHCP. RFC 3118
     defines current security mechanisms for DHCPv4. Unfortunately,
     RFC 3118 has neither been implemented nor deployed to date.
     Specific issues to be considered include:

     - Improved key management and scalability

     - Security for messages passed between relay agents and servers

     - Threats of DoS attacks through DHCPFORCERENEW

     - The increased usage of DHC on unsecured (e.g., wireless) and
       public LANs

     - The need for clients to be able to authenticate servers, without
       simultaneously requiring client authentication by the server.

   o Develop and document a roadmap of any new documents or protocols
     needed to meet the security requirements for DHCP

* Write an analysis of the DHCP specification, including RFC 2131,
   RFC 2132 and other RFCs defining additional options, which
   identifies ambiguities, contradictory specifications and other
   obstacles to development of interoperable implementations. Recommend
   a process for resolving identified problems and incorporating the
   resolutions into the DHCP specification.

* Hosts that include implementations of both IPv4 and IPv6
   ("dual-stack hosts") may use DHCP to obtain configuration settings
   (including assigned addresses) for both IPv4 and IPv6.  The DHCPv4
   and DHCPv6 specifications (RFC 2131, RFC 2132, RFC 3315 and
   subsequent RFCs) do not explicitly explain how a dual-stack host
   uses DHCP to obtain configuration settings for both IP stacks. The
   DHC WG will assess the requirements for a dual-stack host to use
   DHCP to obtain configuration settings for both IPv4 and IPv6, review
   alternative solutions and select a solution, and develop, review and
   publish a document that defines the chosen solution.

* The DHCPv6 specification in RFC 3315 includes a mechanism through
   which clients can obtain other configuration information without
   obtaining an address or addresses.  This mechanisms is sometimes
   called "stateless DHCPv6" and is specified in RFC 3736.  RFC 3315
   includes no provision for notifying DHCPv6 clients using stateless
   DHCPv6 of changes in the configuration information supplied to the
   client or any recommendations as to when a client should obtain
   possibly updated information.  The DHC WG will assess the
   requirements for informing DHCPv6 clients of changes in
   configuration information, review alternative solutions and select a
   solution, and develop, review and publish a specification for the
   chosen solution.



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Date: Tue, 13 Apr 2004 10:02:16 -0400
To: <dhcwg@ietf.org>
From: Ralph Droms <rdroms@cisco.com>
Subject: RE: [dhcwg] Reminder! dhc WG last call on
  draft-ietf-dhc-rapid-commit-opt-00 - shouldn't it be -01?
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Whoops.  Thanks for catching that goof, Bernie.

All - please consider this last call to be on
draft-ietf-dhc-rapid-commit-opt-01.txt.

- Ralph


At 02:15 PM 4/12/2004 -0400, Bernie Volz wrote:
>FYI - The current version this draft is
>draft-ietf-dhc-rapid-commit-opt-01.txt. Being one of the co-authors (and
>subject to making the changes Ralph requested on 4/8), I support this
>moving forward.
>
>- Bernie
>
>-----Original Message-----
>From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
>Ralph Droms
>Sent: Monday, April 12, 2004 11:49 AM
>To: dhcwg@ietf.org
>Subject: [dhcwg] Reminder! dhc WG last call on
>draft-ietf-dhc-rapid-commit-opt-00
>
>
>This message is a reminder of the WG last call on "Rapid Commit Option
>for DHCPv4" <draft-ietf-dhc-rapid-commit-opt-00>.  The last call will
>conclude at 5PM EST on 4/15/04.
>
>There has been only one response to the last call.  Although the
>document will be revised, respond now if you have additional comments,
>so all of the necessary revisions can be made at once.
>
>- Ralph Droms
>
>
>_______________________________________________
>dhcwg mailing list
>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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--NextPart


A new Request for Comments is now available in online RFC libraries.


        RFC 3736

        Title:      Stateless Dynamic Host Configuration Protocol
                    (DHCP) Service for IPv6
        Author(s):  R. Droms
        Status:     Standards Track
        Date:       April 2004
        Mailbox:    rdroms@cisco.com
        Pages:      9
        Characters: 18510
        Updates/Obsoletes/SeeAlso:    None

        I-D Tag:    draft-ietf-dhc-dhcpv6-stateless-04.txt

        URL:        ftp://ftp.rfc-editor.org/in-notes/rfc3736.txt


Stateless Dynamic Host Configuration Protocol service for IPv6
(DHCPv6) is used by nodes to obtain configuration information, such as
the addresses of DNS recursive name servers, that does not require the
maintenance of any dynamic state for individual clients.  A node that
uses stateless DHCP must have obtained its IPv6 addresses through some
other mechanism, typically stateless address autoconfiguration.  This
document explains which parts of RFC 3315 must be implemented in each
of the different kinds of DHCP agents so that agent can support
stateless DHCP.

This document is a product of the Dynamic Host Configuration Working
Group of the IETF.

This is now a Proposed Standard Protocol.

This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
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From dhcwg-admin@ietf.org  Tue Apr 13 15:15:45 2004
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the revised charter looks good to me, Ralph

--Barr
 

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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: RADIUS Attributes Sub-option for the DHCP Relay Agent Information Option
	Author(s)	: R. Droms, J. Schnizlein
	Filename	: draft-ietf-dhc-agentopt-radius-06.txt
	Pages		: 10
	Date		: 2004-4-13
	
A NAS (network access server) may choose to authenticate the identity
   of a device before granting that device access to the network.  The
   IEEE 802.1X protocol is an example of a mechanism for providing
   authenticated layer 2 network access.  A network element using RADIUS
   as an authentication authority will receive attributes from a RADIUS
   server that may be used by a DHCP server in the selection of
   configuration parameters to be delivered to the device through its
   DHCP client. The RADIUS Attributes sub-option enables a network
   element to pass along attributes for the user of a device received
   during RADIUS authentication to a DHCP server.

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From dhcwg-admin@ietf.org  Tue Apr 13 17:19:46 2004
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From: "Steve Gonczi" <steve@relicore.com>
To: <volz@cisco.com>
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Date: Tue, 13 Apr 2004 15:54:52 -0400
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Subject: [dhcwg] RE:  dhc WG last call on  draft-ietf-dhc-rapid-commit-opt-01
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Greetings,

I have some feedback on  draft-ietf-dhc-rapid-commit-opt-01:

1) The draft verbatim quotes a fair amount of text from RFC 2131

E.g.: Sub-sections 1..6 under Paragraph 3.1 
(BTW these sub-sections should probably be 
numbered 3.1.1 ..3.1.6)

IMHO it would be preferable to just point to RFC 2131 
where the Rapid Commit protocol works exactly as 2131, 
and focus more on the differences.

There are some drawbacks to having the common DHCP behavior 
described in 2 different documents. E.g. the 2 texts may lose
sync at one point.
Eliminating the quoted RFC 2131 text would also shorten 
the document and would make it an easier read.

2) IMHO the Rapid Commit draft needs to mandate the following:

"If a client obtains more than one addresses via Rapid Commit ack-s, 
it MUST release any such addresses if it decides 
not to use them." 

The draft does suggest some mitigating measures, under
3.2 Administrative considerations, such as:

Configuring a single Rapid Commit server, or using shorter
leases for Rapid Commit, but I believe the above would be
a cleaner solution.

cheers,

Steve Gonczi



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From dhcwg-admin@ietf.org  Tue Apr 13 17:35:21 2004
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Date: Tue, 13 Apr 2004 16:40:57 -0400
Organization: Cisco
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Subject: [dhcwg] RE: dhc WG last call on  draft-ietf-dhc-rapid-commit-opt-01
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Hi:

I'm pretty neutral on the issue of whether or not to copy text from
2131. When we eventually revise 2131, I believe we'd incorporate this
capability (rapid commit) into the revised 2131 text so I don't think it
is a significant issue. We could remove the text for those steps where
there are no differences (such as step 4 - only) and replace it with
"see RFC 2131". But, this may just increase the confusion (or at least
complexity of following the flow)?

Regarding issue 2, DHCPv6 doesn't mandate this (though in that case
addresses aren't scarce) and doing this begs the question of how long
does the client need to stick around listening for potential DHCPACKs
for these additional messages?

Section 3.2 is clear about when this option should be used and spells
out the issues. It is also why we say:
          A server MAY allow configuration for a different (likely 
          shorter) initial lease time for addresses assigned when Rapid 
          Commit is used to expedite reclaiming addresses not used by 
          clients.

The main point of Rapid Commit is to get the client configured as
quickly as possible. Doing a lease renewal tens of minutes later is not
as significant an issue.

We didn't include text in RFC 3315 (as best I could find and remember)
about releasing addresses in this case for DHCPv6. So, not sure it is
needed here (though again, addresses are not as scarce in v6).

- Bernie

-----Original Message-----
From: Steve Gonczi [mailto:steve@relicore.com] 
Sent: Tuesday, April 13, 2004 3:55 PM
To: volz@cisco.com
Cc: dhcwg@ietf.org
Subject: RE: dhc WG last call on draft-ietf-dhc-rapid-commit-opt-01


Greetings,

I have some feedback on  draft-ietf-dhc-rapid-commit-opt-01:

1) The draft verbatim quotes a fair amount of text from RFC 2131

E.g.: Sub-sections 1..6 under Paragraph 3.1 
(BTW these sub-sections should probably be 
numbered 3.1.1 ..3.1.6)

IMHO it would be preferable to just point to RFC 2131 
where the Rapid Commit protocol works exactly as 2131, 
and focus more on the differences.

There are some drawbacks to having the common DHCP behavior 
described in 2 different documents. E.g. the 2 texts may lose sync at
one point. Eliminating the quoted RFC 2131 text would also shorten 
the document and would make it an easier read.

2) IMHO the Rapid Commit draft needs to mandate the following:

"If a client obtains more than one addresses via Rapid Commit ack-s, 
it MUST release any such addresses if it decides 
not to use them." 

The draft does suggest some mitigating measures, under
3.2 Administrative considerations, such as:

Configuring a single Rapid Commit server, or using shorter leases for
Rapid Commit, but I believe the above would be a cleaner solution.

cheers,

Steve Gonczi



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Date: Wed, 14 Apr 2004 15:44:22 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] Reminder! dhc WG last call on
 draft-ietf-dhc-reclassify-options-00
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I second this draft moving forward.



- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Ralph Droms
> Sent: Tuesday, April 13, 2004 12:52 AM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Reminder! dhc WG last call on 
> draft-ietf-dhc-reclassify-options-00
> 
> 
> This message is a reminded of the WG last call on 
> "Reclassifying DHCPv4
> Options" <draft-ietf-dhc-reclassify-options-00>.  The last call will
> conclude at 5PM EST on 4/16/04.
> 
> Please respond to this WG last call.  If you support acceptance of the
> document without change, respond with a simple acknowledgment, so that
> support for the document can be assessed.
> 
> - Ralph Droms
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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From dhcwg-admin@ietf.org  Wed Apr 14 03:48:17 2004
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Date: Wed, 14 Apr 2004 16:37:54 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] Reminder! dhc WG last call on
 draft-ietf-dhc-proxyserver-opt-00
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I have a two comments on this draft.

[1]
This draft said as below:

>Proxy server increases the network security and 
>user productivity by content filtering and controlling 
>both internal and external access to information. 

I guess you are so confusing between filtering and proxy.
Typically there are two types of firewalls such as
*Filtering Firewalls - to block selected network packets.
*Proxy Servers - to make network connections for you.

Also, I am not sure proxy server increases the network
security.


[2]
In Security Considerations

>DHCP provides an authentication mechanism, as 
>described in RFC 3118 [3], which may be used if 
>authentication is required.

Some proxy such as HTTP can provide an authentication
to users without DHCP support. It means proxy server 
can ask the users to login/password before a connection 
to the outside is made.





- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Ralph Droms
> Sent: Tuesday, April 13, 2004 12:47 AM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Reminder! dhc WG last call on 
> draft-ietf-dhc-proxyserver-opt-00
> 
> 
> This message is a reminder of the WG last call on "DHCP 
> Option for Proxy
> Server Configuration" <draft-ietf-dhc-proxyserver-opt-00>.  
> The last call
> will conclude at 5PM EST on Friday, 4/16/04.
> 
> There have only been two responses to the last call.  
> Although the document
> will be revised and go through another WG last call, respond 
> now if you have
> additional comments, so all of the necessary revisions can be 
> made at once.
> 
> - Ralph Droms
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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> -----Original Message-----
> From: Steve Gonczi
> Sent: Tuesday, 13 April 2004 12:55
>
> I have some feedback on
> draft-ietf-dhc-rapid-commit-opt-01:
>
> 1) The draft verbatim quotes a fair amount of
> text from RFC 2131
>
> E.g.: Sub-sections 1..6 under Paragraph 3.1
> (BTW these sub-sections should probably be
> numbered 3.1.1 ..3.1.6)
>
> IMHO it would be preferable to just point to RFC 2131
> where the Rapid Commit protocol works exactly as 2131,
> and focus more on the differences.
>
> There are some drawbacks to having the common
> DHCP behavior
> described in 2 different documents. E.g. the 2
> texts may lose
> sync at one point.
> Eliminating the quoted RFC 2131 text would also shorten
> the document and would make it an easier read.
>
...yes, Steve, we have inadvertently introduced
synchronization errors in the past by having the same action
described in two (or more) different RFCs, but Bernie may
have had in mind my current draft on procedures for updating
DHCPv4
(http://www.ietf.org/internet-drafts/draft-hibbs-dhc-changes
-00.txt) when he included the quoted text.  I personally
feel that supplying replacement text in it's entirety for
the existing text in an RFC to be updated by an I-D is a
good idea, in that a complete replacement avoids many
typographical errors when applying the new text.

--Barr


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comments in-line

--Barr


> -----Original Message-----
> From: Ralph Droms
> Sent: Tuesday, 06 April 2004 17:21
>
> Bert Wijnen:
> - what is the status of this solution vs. DHCP MIB
> solution (I thought they were competing solutions
> some time back).
> - The DHC MIB has also been submitted for PS,
> no? I know it is still in MIB Doctor review... but
> it is a 2nd solution to same problem.
> - The reasoning for not using SNMP and MIB seem
> very weak to me
>
...the MIB effort grew out of traffic engineering and
troubleshooting activities at Pacific*Bell, and was
primarily intended as a method of gathering performance
statistics about the servers we operated and the load
presented to them by our very large installation [for that
time.]  Despite the presence in the proposed DHCPv4 server
MIB of objects that report configuration and [status]
information. DHCPLEASEQUERY is intended to provide detailed,
specific information about individual leases, while the MIB
was intended to provide more generic, server-wide aggregated
or summarized data.  Also, the DHCPLEASEQUERY message type
is not required to be supported by all DHCPv4 servers:  the
I-D does not make that demand for either existing or new
server implementations.


> Ted Hardie:
> It's too bad that SNMP is off the table here, as
> that would give you a realistic way to limit data
> to specific queries and queries.
>
...my primary objection to making the information reported
by responses to DHCPLEASEQUERY messages accessible through
the DHCPv4 server MIB is that processing of DHCPLEASEQUERY
messages is not required of all DHCPv4 servers:  my sense
from the MIB Doctor review of the proposed server MIB is
that defining optional MIB objects and objects for optional
features is discouraged.


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From dhcwg-admin@ietf.org  Wed Apr 14 14:03:14 2004
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Subject: RE: [dhcwg] Restrictions of information flow in leasequery  messages
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comments in-line

--Barr


> -----Original Message-----
> From: Bernie Volz
> Sent: Friday, 09 April 2004 09:29
>
> Perhaps a solution is that a server always has
> the option of not returning data it considers
> too sensitive - such as GEOPRIV information.
>
...I'd suggest that the option of which information to
return be specifically named as a "local policy" issue -- I
still carry the bruises from the discussion about
provisioning servers with client location information, so am
just a bit sensitive to this one in particular.  As I've
been repeatedly told, in some legal jurisdictions physical
location information is required, to be available to
emergency responders and others according to statute or
ordinance.  One method for obtaining this information might
be to use the DHCPLEASEQUERY mechanism, so we need to be
specific, I think, that the data to be returned ought to be
in the realm of local administrative decisions.  In some
jurisdictions, location information would be considered
private or privileged information, while in others it may be
mandated to be publicly available.  Let's stay away from the
policy questions and declared this a local administrative
matter.


> Perhaps something like the following should be
> added to the Security Considerations:
>
>    In some environments it may be appropriate to
> configure a DHCP server with option numbers that
> MUST not be returned in response to DHCPLEASEQUERY
> messages because these options are considered to
> contain sensitive information.
>
...I like this wording....


> I do think that once security options exists for
> relay to server communication, if this was a
> concern at a site, the site should use those
> options (and restrict who the server responds to
> for a DHCPLEASEQUERY).
>
...you're almost suggesting that a more complete security
model be developed for DHCPv4, including Access Control
Lists for DHCPLEASEQUERY requests and responses.  While I
don't object, I think that we should keep in mind what we
might be calling for as a future requirement.



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From dhcwg-admin@ietf.org  Wed Apr 14 15:42:15 2004
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From: "Steve Gonczi" <steve@relicore.com>
To: "Bernie Volz" <volz@cisco.com>
Cc: <dhcwg@ietf.org>
Date: Wed, 14 Apr 2004 15:27:42 -0400
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Subject: [dhcwg] RE: dhc WG last call on  draft-ietf-dhc-rapid-commit-opt-01
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> I'm pretty neutral on the issue of whether or not to copy text from
> 2131. When we eventually revise 2131, I believe we'd incorporate this
> capability (rapid commit) into the revised 2131 text so I don't think it
> is a significant issue. 

Yes, if rapid commit gets merged with 2131, the text would be entirely 
appropriate for that draft.  

Is the merging of the 2 documents intended by the WG? 

In the past, I have seen the opposite trend (i.e. breaking out 
optional features into separate drafts, like in the case of the
DHC load balancing RFC that was originally part of 
the failover draft).

I maintain that the current draft would be easier to read if it 
just described the specifics of what it does differently.

>Section 3.2 is clear about when this option should be used and spells
>out the issues. It is also why we say:
>          A server MAY allow configuration for a different (likely 
>          shorter) initial lease time for addresses assigned when Rapid 
>          Commit is used to expedite reclaiming addresses not used by 
>          clients.

Regarding the IPv4 address leakage issue: I would prefer at least 
allowing a solution in the protocol itself, instead of mandating
deployment policy. (Which you do in 3.2)
Ideally, protocol standards would speak to the implementer community, 
not the sysadmins.

If it is impractical to solve the issue in the protocol itself
the deployment restrictions should be a SHOULD not a MUST.

Section 3.2 should consider other possibilities to deal 
with address depletion, such as using the DHC load balancing 
algo to prevent multiple responding servers.

How about:

"Since the Rapid Commit protocol provides no facilities to prevent tying up
multiple IPv4 addresses by multiple responding servers, deployments 
SHOULD prevent multiple address commitments, relying on one or more of the
following options:

a) If possible, deploy the DHC load balancing protocol, or
b) Allow a single Rapid Commit enabled server per site
c) Provide a sufficiently large IP address pool 
d) Employ sufficiently short Rapid Commit lease times

 

Cheers

/sG

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From dhcwg-admin@ietf.org  Thu Apr 15 22:47:44 2004
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Date: Fri, 16 Apr 2004 11:38:31 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] RE: dhc WG last call on  draft-ietf-dhc-rapid-commit-opt-01
In-reply-to: <BFELJLKGHEJOPOPGJBKKMEKICIAA.steve@relicore.com>
To: "'Steve Gonczi'" <steve@relicore.com>, "'Bernie Volz'" <volz@cisco.com>
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Steve, thanks your valuable comments on the draft
during WGLC and kindly look my response inline.


- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> How about:
> 
> "Since the Rapid Commit protocol provides no facilities to 
> prevent tying up
> multiple IPv4 addresses by multiple responding servers, deployments 
> SHOULD prevent multiple address commitments, relying on one 
> or more of the
> following options:
> 
> a) If possible, deploy the DHC load balancing protocol, or
> b) Allow a single Rapid Commit enabled server per site
> c) Provide a sufficiently large IP address pool 
> d) Employ sufficiently short Rapid Commit lease times
> 

I think the current draft already sufficiently described (b),(c),(d).
IMO, (a) is beyond our scope because it is a supplementary
method on the DHCP body not specific Rapid Commit issue.


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I support advancing this draft.

--Barr


> -----Original Message-----
> From: Bernie Volz
> Sent: Monday, 12 April 2004 11:16
> 
> FYI - The current version this draft is
> draft-ietf-dhc-rapid-commit-opt-01.txt. 


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From: "Richard Barr Hibbs" <rbhibbs@pacbell.net>
To: <dhcwg@ietf.org>
Subject: RE: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-proxyserver-opt-00
Date: Thu, 15 Apr 2004 20:44:04 -0700
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I support advancing this draft.

--Barr


> > -----Original Message-----
> > From: Ralph Droms
> > Sent: Tuesday, April 13, 2004 12:47 AM
> >
> > This message is a reminder of the WG last call on "DHCP
> > Option for Proxy Server Configuration"
> <draft-ietf-dhc-proxyserver-opt-00>.
> > The last call will conclude at 5PM EST on Friday,
4/16/04.
> >


_______________________________________________
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https://www1.ietf.org/mailman/listinfo/dhcwg


From dhcwg-admin@ietf.org  Thu Apr 15 23:50:20 2004
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From: "Richard Barr Hibbs" <rbhibbs@pacbell.net>
To: "S. Daniel Park" <soohong.park@samsung.com>,
        "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-reclassify-options-00
Date: Thu, 15 Apr 2004 20:49:08 -0700
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I thought I'd previously responded to this last call, but I
can't find the message, so....

I support advancing this draft.

--Barr


> > -----Original Message-----
> > From: Ralph Droms
> > Sent: Tuesday, April 13, 2004 12:52 AM
> >
> > This message is a reminded of the WG last call on
> > "Reclassifying DHCPv4 Options"
> <draft-ietf-dhc-reclassify-options-00>.  The last
> call will conclude at 5PM EST on 4/16/04.
> >


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https://www1.ietf.org/mailman/listinfo/dhcwg


From dhcwg-admin@ietf.org  Fri Apr 16 00:08:02 2004
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From: "Richard Barr Hibbs" <rbhibbs@pacbell.net>
To: <dhcwg@ietf.org>
Subject: RE: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-3315id-for-v4-01
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I support advancing this draft, but have a couple of minor
suggestions that I believe the authors should consider.

(1) Section 1.0 Applicability, second sentence:  "DHCPv4
servers implementations...." SHOULD read "DHCPv4 server
implementations...."

(2) Section 2.1 Client identities are ephemeral, last
sentence:  "...domain name as published through the DHCP
server" probably SHOULD read "...domain name as published
through the DHCPv4 server" as this paragraph is discussing
an issue with RFC 2132.  In other places in the draft DHCPv4
and DHCPv6 were separately identified where appropriate, and
jointly identified as DHCP when appropriate.

(3) Section 4.3 Changes from RFC2131, last sentence, "...is
replaced by the text, 'The client MUST explicitly provide a
client identifier through the "client identifier" option'"
would be improved by the addition of the following wording,
"...and MUST use the SAME client identifier for ALL
messages."

--Barr


> -----Original Message-----
> From: Ralph Droms
> Sent: Monday, 12 April 2004 08:52
>
> This message is a reminder of the WG last call on
> "Node-Specific Client Identifiers for DHCPv4"
> <draft-ietf-dhc-3315id-for-v4-01>.  The last call
> will conclude at 5PM on 4/16/04.
>


_______________________________________________
dhcwg mailing list
dhcwg@ietf.org
https://www1.ietf.org/mailman/listinfo/dhcwg


From dhcwg-admin@ietf.org  Fri Apr 16 00:19:33 2004
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To: "Dhcwg" <dhcwg@ietf.org>
Subject: FW: [dhcwg] Reminder! dhc WG last call on draft-ietf-dhc-3315id-for-v4-01
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duh!  left out something....

(4) Section 4.4, Changes from RFC2132, replacement text
would be improved by the addition of a diagram.

--Barr


-----Original Message-----
From: Richard Barr Hibbs [mailto:rbhibbs@pacbell.net]
Sent: Thursday, 15 April 2004 21:05
To: dhcwg@ietf.org
Subject: RE: [dhcwg] Reminder! dhc WG last call on
draft-ietf-dhc-3315id-for-v4-01



I support advancing this draft, but have a couple of minor
suggestions that I believe the authors should consider.

(1) Section 1.0 Applicability, second sentence:  "DHCPv4
servers implementations...." SHOULD read "DHCPv4 server
implementations...."

(2) Section 2.1 Client identities are ephemeral, last
sentence:  "...domain name as published through the DHCP
server" probably SHOULD read "...domain name as published
through the DHCPv4 server" as this paragraph is discussing
an issue with RFC 2132.  In other places in the draft DHCPv4
and DHCPv6 were separately identified where appropriate, and
jointly identified as DHCP when appropriate.

(3) Section 4.3 Changes from RFC2131, last sentence, "...is
replaced by the text, 'The client MUST explicitly provide a
client identifier through the "client identifier" option'"
would be improved by the addition of the following wording,
"...and MUST use the SAME client identifier for ALL
messages."

--Barr


> -----Original Message-----
> From: Ralph Droms
> Sent: Monday, 12 April 2004 08:52
>
> This message is a reminder of the WG last call on
> "Node-Specific Client Identifiers for DHCPv4"
> <draft-ietf-dhc-3315id-for-v4-01>.  The last call
> will conclude at 5PM on 4/16/04.
>


_______________________________________________
dhcwg mailing list
dhcwg@ietf.org
https://www1.ietf.org/mailman/listinfo/dhcwg


From dhcwg-admin@ietf.org  Fri Apr 16 02:31:07 2004
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From dhcwg-admin@ietf.org  Fri Apr 16 13:08:31 2004
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Date: Fri, 16 Apr 2004 12:49:58 -0400
To: dhcwg@ietf.org
From: Ralph Droms <rdroms@cisco.com>
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Subject: [dhcwg] Revised charter (final)
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Here is a final charter for the WG, based on discussion at the WG meeting in
Seoul and discussion on the mailing list.  I will submit this charter to the
IESG for review.

- Ralph

dhc WG final revised charter
----------------------------

The dhc working group (DHC WG) has developed DHCP for automated
allocation, configuration and management of IP addresses and TCP/IP
protocol stack parameters. DHCPv4 is currently a "Draft Standard" and
is documented in RFC 2131 and RFC 2132.  DHCPv6 is currently a
"Proposed Standard" and is documented in RFC 3315.  Subsequent RFCs
document additional options and other enhancements to the
specifications.

The DHC WG is responsible for reviewing (and sometimes developing)
DHCP options or other extensions (for both IPv4 and IPv6). The DHC WG
is expected to review all proposed extensions to DHCP to ensure that
they are consistent with the DHCP specification and other option
formats, that they do not duplicate existing mechanisms, etc. The DHC
WG will not (generally) be responsible for evaluating the semantic
content of proposed options. The DHC WG will not adopt new proposals
for extensions to DHCP as working group documents without first
coordinating with other relevant working groups and determining who
has the responsibility for reviewing the semantic content of an
option.

The DHC WG has the following main objectives:

* Address security in DHCP

   o Develop and document security requirements for DHCP. RFC 3118
     defines current security mechanisms for DHCPv4. Unfortunately,
     RFC 3118 has neither been implemented nor deployed to date.
     Specific issues to be considered include:

     - Improved key management and scalability

     - Security for messages passed between relay agents and servers

     - Threats of DoS attacks through DHCPFORCERENEW

     - The increased usage of DHC on unsecured (e.g., wireless) and
       public LANs

     - The need for clients to be able to authenticate servers, without
       simultaneously requiring client authentication by the server.

   o Develop and document a roadmap of any new documents or protocols
     needed to meet the security requirements for DHCP

* Write an analysis of the DHCP specification, including RFC 2131,
   RFC 2132 and other RFCs defining additional options, which
   identifies ambiguities, contradictory specifications and other
   obstacles to development of interoperable implementations. Recommend
   a process for resolving identified problems and incorporating the
   resolutions into the DHCP specification.

* Assess the requirements for a dual-stack host to use DHCP to obtain
   configuration settings for both IPv4 and IPv6, review alternative
   solutions and select a solution, and develop, review and publish a
   document that defines the chosen solution.  Hosts that include
   implementations of both IPv4 and IPv6 ("dual-stack hosts") may use
   DHCP to obtain configuration settings (including assigned addresses)
   for both IPv4 and IPv6.  The DHCPv4 and DHCPv6 specifications (RFC
   2131, RFC 2132, RFC 3315 and subsequent RFCs) do not explicitly
   explain how a dual-stack host uses DHCP to obtain configuration
   settings for both IP stacks.

* Assess the requirements for informing DHCPv6 clients of changes in
   configuration information, review alternative solutions and select a
   solution, and develop, review and publish a specification for the
   chosen solution.  The DHCPv6 specification in RFC 3315 includes a
   mechanism through which clients can obtain other configuration
   information without obtaining an address or addresses.  This
   mechanisms is sometimes called "stateless DHCPv6" and is specified
   in RFC 3736.  RFC 3315 includes no provision for notifying DHCPv6
   clients using stateless DHCPv6 of changes in the configuration
   information supplied to the client or any recommendations as to when
   a client should obtain possibly updated information.


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From dhcwg-admin@ietf.org  Fri Apr 16 13:39:01 2004
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At the dhc WG meeting in Seoul, the WG expressed interest in taking on the
following documents as dhc WG work items, pending revision of the WG charter
to cover the areas of work addressed by the documents.

Now that the WG has agreed to a revised charter that includes the
appropriate charter items, we can confirm that there is consensus for the WG
to take on the documents.  So, please review the following documents:

Renumbering Requirements for Stateless DHCPv6
   <draft-chown-dhc-stateless-dhcpv6-renumbering-00>

Lifetime Option for DHCPv6
   <draft-venaas-dhc-lifetime-01>

IPv4 and IPv6 Dual-Stack Issues for DHCPv6
   <draft-chown-dhc-dual-stack-00>

and respond to the WG mailing list with comments and indicate whether you
agree or disagree that the WG should accept the documents as work items.

- Ralph 


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From dhcwg-admin@ietf.org  Fri Apr 16 16:13:02 2004
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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: Detection of Network Attachment (DNA) in IPv4
	Author(s)	: B. Aboba
	Filename	: draft-ietf-dhc-dna-ipv4-07.txt
	Pages		: 17
	Date		: 2004-4-16
	
The time required to detect movement (or lack of movement) between
   subnets, and to obtain (or continue to use) a valid IPv4 address may
   be significant as a fraction of the total delay in moving between
   points of attachment.  This document synthesizes experience garnered
   over the years in the deployment of hosts supporting ARP, DHCP and
   Link-Local IPv4 addresses.  A procedure is specified for detection of
   network attachment in order to better accommodate mobile hosts.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-dhc-dna-ipv4-07.txt

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From dhcwg-admin@ietf.org  Fri Apr 16 17:21:53 2004
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A New Internet-Draft is available from the on-line
Internet-Drafts directories.


	Title		: Requirements for Proposed Changes to the Dynamic
Host Configuration Protocol for IPv4 (DHCPv4)
	Author(s)	: R. Hibbs
	Filename	: draft-hibbs-dhc-changes-01.txt
	Pages		: 7
	Date		: 2004-4-14

This memo describes the requirements of Internet-Drafts
proposing
changes to the Dynamic Host Configuration Protocol for IPv4
(DHCPv4).
These requirements specifically cover documentation expected
whenever
message formats or client state transitions are modified.

Changes from the "-00" version of this draft include
changing all
occurrences of the mnemonic "DHCP" to "DHCPv4" for clarity.

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http://www.ietf.org/internet-drafts/draft-hibbs-dhc-changes-
01.txt

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Date: Mon, 19 Apr 2004 09:59:09 +0200
From: Martin Stiemerling <stiemerling@netlab.nec.de>
To: Ralph Droms <rdroms@cisco.com>, dhcwg@ietf.org
Subject: Re: [dhcwg] New dhc WG work items
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Hi,

Please see comments inline.

  Martin

--On Freitag, 16. April 2004 13:13 Uhr -0400 Ralph Droms <rdroms@cisco.com> 
wrote:

| At the dhc WG meeting in Seoul, the WG expressed interest in taking on the
| following documents as dhc WG work items, pending revision of the WG
| charter
| to cover the areas of work addressed by the documents.
|
| Now that the WG has agreed to a revised charter that includes the
| appropriate charter items, we can confirm that there is consensus for the
| WG
| to take on the documents.  So, please review the following documents:
|
| Renumbering Requirements for Stateless DHCPv6
|    <draft-chown-dhc-stateless-dhcpv6-renumbering-00>
|
| Lifetime Option for DHCPv6
|    <draft-venaas-dhc-lifetime-01>

Those two documents are OK to go for WG documents.

|
| IPv4 and IPv6 Dual-Stack Issues for DHCPv6
|    <draft-chown-dhc-dual-stack-00>

Following the discussion at the last meeting in Seoul, I do not see that 
this document is currently ready to get a WG draft. Many issues are open 
and the discussions have shown that for instance (from the minutes):
"[...] kre remarked that title is all wrong; draft really discusses problem 
of accepting configuration from multiple interfaces. [...]"

Probably it is better to take another revision and afterwards decided 
again.

|
| and respond to the WG mailing list with comments and indicate whether you
| agree or disagree that the WG should accept the documents as work items.
|
| - Ralph
|
| _______________________________________________
| dhcwg mailing list
| dhcwg@ietf.org
| https://www1.ietf.org/mailman/listinfo/dhcwg



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From dhcwg-admin@ietf.org  Mon Apr 19 11:58:24 2004
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From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] New dhc WG work items
Date: Mon, 19 Apr 2004 08:39:00 -0700
To: Martin Stiemerling <stiemerling@netlab.nec.de>
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On Apr 19, 2004, at 12:59 AM, Martin Stiemerling wrote:
> Probably it is better to take another revision and afterwards decided 
> again.

It was generally agreed that there was work to do.   Taking it on as a 
wg item would allow us to do that work.   Taking it on as a wg item 
doesn't mean it's done and ready for last call!

So I'm in favor of taking this on as a work item, and also the other 
two drafts.


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From dhcwg-admin@ietf.org  Tue Apr 20 11:22:30 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] New dhc WG work items
Date: Tue, 20 Apr 2004 10:50:49 -0400
Organization: Cisco
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Hi:

I'm in favor of taking on these drafts, though somewhat hesitant =
regarding
the dual stack issues since I think this is a wider issue than just DHCP =
-
as there could be dual stack issues with manual configuration or
configuration through other protocols (such as PPP, RADIUS, ...). I also
suggest that this work be called something like "DHCP Dual-Stack Issues" =
or
"Interaction of DHCPv4 and DHCPv6 [on Dual-Stack Hosts]". A complete =
review
could even suggest new options for DHCPv4? And, should this work even
consider the issue of multiple administrative domains - such as VPNs and =
the
like and the complexity that those add, which is something that is only =
know
at the client.

- Bernie

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On=20
> Behalf Of Ralph Droms
> Sent: Friday, April 16, 2004 1:14 PM
> To: dhcwg@ietf.org
> Subject: [dhcwg] New dhc WG work items
>=20
>=20
> At the dhc WG meeting in Seoul, the WG expressed interest in=20
> taking on the following documents as dhc WG work items,=20
> pending revision of the WG charter to cover the areas of work=20
> addressed by the documents.
>=20
> Now that the WG has agreed to a revised charter that includes=20
> the appropriate charter items, we can confirm that there is=20
> consensus for the WG to take on the documents.  So, please=20
> review the following documents:
>=20
> Renumbering Requirements for Stateless DHCPv6
>    <draft-chown-dhc-stateless-dhcpv6-renumbering-00>
>=20
> Lifetime Option for DHCPv6
>    <draft-venaas-dhc-lifetime-01>
>=20
> IPv4 and IPv6 Dual-Stack Issues for DHCPv6
>    <draft-chown-dhc-dual-stack-00>
>=20
> and respond to the WG mailing list with comments and indicate=20
> whether you agree or disagree that the WG should accept the=20
> documents as work items.
>=20
> - Ralph=20
>=20
>=20
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
>=20


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From dhcwg-admin@ietf.org  Tue Apr 20 11:32:51 2004
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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: Rapid Commit Option for DHCPv4
	Author(s)	: P. Kim, et al. 
	Filename	: draft-ietf-dhc-rapid-commit-opt-02.txt
	Pages		: 11
	Date		: 2004-4-19
	
This document defines a new DHCPv4 option, modeled on the DHCPv6      
Rapid Commit option, for obtaining IP address and configuration      
information using a 2-message exchange rather than the usual 4-
message exchange, expediting client configuration.

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Date: Tue, 20 Apr 2004 11:01:43 -0400
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Subject: [dhcwg] Results of WG last call on draft-ietf-dhc-3315id-for-v4
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draft-ietf-dhc-3315id-for-v4 did not pass WG last call.

Barr Hibbs raised the issue of creating a new DHCP option for the new client
identifier.  Bernie Volz responded,
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03389.html
, and I infer from Barr's message
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03478.html
that he now supports using the existing option 61 for the new client
identifier.

Barr also raised the issue of folding the definition of the new identifier
into the revision of RFC 2131 and RFC 2132.  Bernie and Ted Lemon responded,
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03426.html
and
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03440.html,
and I infer from Barr's message
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03478.html
that he now supports moving forward with the new client identifier
independent of any revision of RFC 2131 and RFC 2132.

I asked about an example of a client identifier constructed according to
this draft,
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03413.html

Finally, Barr provided some editorial corrections and suggestions,
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03478.html
and
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03479.html

So, we'll wait for a revision of the draft to be published and then
conduct another WG last call.

- Ralph


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From dhcwg-admin@ietf.org  Tue Apr 20 12:19:30 2004
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draft-ietf-dhc-proxyserver-opt did not pass WG last call.

Ted Lemon and Bernie Volz made substantive suggestions about the syntax of 
the option, 
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03397.html 
and 
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03450.html

Ted, S. Daniel Park and I all made editorial changes and suggestions, in 
Ted's earlier message, 
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03466.html 
and 
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03399.html

We need to complete discussion of the substantive suggestions and then we 
will conduct another WG last call on the revised draft.

- Ralph


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From dhcwg-admin@ietf.org  Tue Apr 20 12:36:29 2004
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Date: Tue, 20 Apr 2004 11:19:52 -0400
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Subject: Re: [dhcwg] dhc WG last call on
  draft-ietf-dhc-proxyserver-opt-00
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Ted and I both made the same suggestion about carrying a list of servers in
one instance of the suboption, rather than multiple instances of the same
suboption each carrying one server.  Is this change acceptable to the WG
(please respond yes or no)?

- Ralph

At 12:56 PM 4/7/2004 -0500, Ted Lemon wrote:
>I have a bunch of suggested changes to this draft, which fall into three 
>categories:
>
>1. A single change to the protocol itself.
>2. Editorial changes - I think there was some extra text in this draft 
>explaining proxy servers that isn't needed, and generate questions during 
>the IESG review, so I'm suggesting that it be deleted.
>3. Copyediting.   There were some minor spelling and grammatical errors.
>
>The change to the protocol is that it currently specifies an encapsulation 
>of suboptions, like option 82, but allows for the appearance of multiple 
>suboptions, which is different than the behavior specified for handling 
>options in RFC3396.   This is not a huge problem, but it probably requires 
>additional code in DHCP servers and clients that isn't necessary, so I'd 
>suggest changing it so that if you want to specify multiple proxy servers 
>for the same protocol, you should just list more than one IP address/port 
>tuple in the suboption for that protocol.
>
>I've enclosed a diff for all the changes.
>
>
>


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From dhcwg-admin@ietf.org  Tue Apr 20 12:37:08 2004
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From: Ralph Droms <rdroms@cisco.com>
Subject: RE: [dhcwg] dhc WG last call on
  draft-ietf-dhc-proxyserver-opt-00
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Bernie made a suggestion about the syntax of the option.  Any comment from 
the WG?

- Ralph

At 01:52 PM 4/12/2004 -0400, Bernie Volz wrote:
>Perhaps this has been discussed in the past and discarded, but what
>about removing the need for yet-another-list? If the option where
>changed not to use sub-options at all but instead carried tuples of:
>         2-octets of well-known protocol number
>         4-octets of proxy server internet address
>         2-octets of proxy server port number
>The option length would then be multiples of 8 bytes.
>
>For example:
>         Option Header:  TBD-option-code,24-bytes
>         Proxy for HTTP: 80,http-proxy-server-1,8080
>         Proxy for HTTP: 80,http-proxy-server-2,8080
>         Proxy for FTP:  21,ftp-proxy-server-1,21
>
>This avoids the need for future protocols to have an enumeration and the
>current "getservicename" calls can be used to find the port numbers.
>
>Otherwise, I recommend moving this draft forward.
>
>- Bernie
>-----Original Message-----
>From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On Behalf Of
>Ted Lemon
>Sent: Wednesday, April 07, 2004 1:57 PM
>To: dhcwg@ietf.org
>Subject: Re: [dhcwg] dhc WG last call on
>draft-ietf-dhc-proxyserver-opt-00
>
>
>I have a bunch of suggested changes to this draft, which fall into
>three categories:
>
>1. A single change to the protocol itself.
>2. Editorial changes - I think there was some extra text in this draft
>explaining proxy servers that isn't needed, and generate questions
>during the IESG review, so I'm suggesting that it be deleted.
>3. Copyediting.   There were some minor spelling and grammatical errors.
>
>The change to the protocol is that it currently specifies an
>encapsulation of suboptions, like option 82, but allows for the
>appearance of multiple suboptions, which is different than the behavior
>specified for handling options in RFC3396.   This is not a huge
>problem, but it probably requires additional code in DHCP servers and
>clients that isn't necessary, so I'd suggest changing it so that if you
>want to specify multiple proxy servers for the same protocol, you
>should just list more than one IP address/port tuple in the suboption
>for that protocol.
>
>I've enclosed a diff for all the changes.
>
>
>
>_______________________________________________
>dhcwg mailing list
>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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From dhcwg-admin@ietf.org  Tue Apr 20 12:41:37 2004
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draft-ietf-dhc-rapid-commit-opt did not pass WG last call.  A new revision
of the document, draft-ietf-dhc-rapid-commit-opt-02.txt, has been published
in response to the comments received during the WG last call.  I'll start a
WG last call on this new revision.

- Ralph


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From dhcwg-admin@ietf.org  Tue Apr 20 12:43:03 2004
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This message announces a WG last call on "Rapid Commit Option for DHCPv4"
<draft-ietf-dhc-rapid-commit-opt>.  The last call will conclude at 5PM EDT
on 4/30/2004.

Please respond to this WG last call.  If you support acceptance of the
document without change, respond with a simple acknowledgment, so that
support for the document can be assessed.  Note that this is a new
last call on this document, which was revised after comment recieved
during the WG last call that ended on 4/15/2004.

draft-ietf-dhc-rapid-commit-opt defines a new DHCPv4 option, modeled on
the DHCPv6 Rapid Commit option, for obtaining IP address and configuration
information using a 2-message exchange rather than the usual 4- message
exchange, expediting client configuration.  This draft is available as
http://www.ietf.org/internet-drafts/draft-ietf-dhc-rapid-commit-opt-02.txt

- Ralph Droms 


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From dhcwg-admin@ietf.org  Tue Apr 20 12:45:51 2004
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draft-ietf-dhc-reclassify-options passed WG last call, but requires some
minor editorial changes
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03411.html
Once a revised version of the I-D has been published, it will be sent to
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- Ralph


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From dhcwg-admin@ietf.org  Tue Apr 20 12:49:13 2004
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draft-ietf-dhc-vendor passed WG last call, but requires some
minor editorial changes
http://www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03412.html
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- Ralph 


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From dhcwg-admin@ietf.org  Tue Apr 20 12:55:03 2004
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Subject: [dhcwg] Question about 3315id-for-v4
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It seems one of the motivations for draft-ietf-dhc-3315id-for-v4 is to
specify a way in which a dual-stack host can use the same identifier in
DHCPv4 and in DHCPv6.  A uniform identifier for both versions of DHCP would
be useful in the DHCID RR when detecting and reconciling DNS name clashes.

So, is there consensus that draft-ietf-dhc-3315id-for-v4 should be designed
to support the consistent identification of a host in a DHCID RR regardless
of whether the host uses DHCPv4 or DHCPv6?

If the answer is yes, how can that consistent identification be achieved?  I
think the identifier in the latest revision of draft-ietf-dhc-3315id-for-v4
could be used, if the DHCP server and the client agree to use only the DUID
in the DHCID RR.  However, I think it would be better to avoid requiring the
DHCPv4 server to parse the 3315id-for-v4 client identifier for use in the
DHCID RR.  Is there some other way in which the use of the DHCID RR can be
defined to avoid requiring the parsing of any client identification (either
DHCpv4 or DHCPv6)?

- Ralph


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From dhcwg-admin@ietf.org  Tue Apr 20 13:08:05 2004
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At the WG meeting in Seoul, I promised to "arrange for a discussion to
reconcile this option with DHCPv6 prefix delegation and earlier ODAP work."
I would like to identify a small team of volunteers to take up this issue
and review draft-shen-dhc-block-alloc-01, earlier work on ODAP and DHCPv6
prefix delegation.  The result of this review will include an analysis of
the similarities and differences between the various proposals, a
description of the automated address management problem space and
recommendations for work on DHCP required in that space.

I would like to get at least one author from each of the drafts on the
design team and, of course, other volunteers are welcome.

- Ralph



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Items to note:

Section 3.1:

The first step says "The client broadcasts a DHCPDISCOVER mess on its local
physical."  Physical what?  Interface, I presume?

The second step talks about using the client identifier or chaddr plus
assigned network address as the identifier for the lease.  I believe this
puts it in conflict with RFC 2131 (which talks about using a subnet address,
not necessarily the address of the lease), and RFC 3046 which adds in the
Remote ID.  I believe that this draft should probably reference RFC 3046 on
this topic.

Come to think of it, it looks like this draft re-iterates a bunch of wording
that is already in RFC 2131 (such as:

           When allocating a new address, servers SHOULD check that the     
           offered network address is not already in use; e.g., the 
           server may probe the offered address with an ICMP Echo Request.  
           Servers SHOULD be implemented so that network administrators 
           MAY choose to disable probes of newly allocated addresses. 

).  Does this really need to be restated, or would a reference back to the
"normal" DHCP behaviour as defined in RFC 2131 be sufficient?


Section 4:

This states that a client SHOULD include this option in a discover if it's
prepared to perform the DISCOVER-ACK exchange.  Shouldn't that be a MUST
since there is that if clause at the end?



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<HTML>
<HEAD>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Diso-8859-1">
<META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version =
5.5.2653.12">
<TITLE>RE: [dhcwg] I-D =
ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt</TITLE>
</HEAD>
<BODY>

<P><FONT SIZE=3D2>Items to note:</FONT>
</P>

<P><FONT SIZE=3D2>Section 3.1:</FONT>
</P>

<P><FONT SIZE=3D2>The first step says &quot;The client broadcasts a =
DHCPDISCOVER mess on its local physical.&quot;&nbsp; Physical =
what?&nbsp; Interface, I presume?</FONT></P>

<P><FONT SIZE=3D2>The second step talks about using the client =
identifier or chaddr plus assigned network address as the identifier =
for the lease.&nbsp; I believe this puts it in conflict with RFC 2131 =
(which talks about using a subnet address, not necessarily the address =
of the lease), and RFC 3046 which adds in the Remote ID.&nbsp; I =
believe that this draft should probably reference RFC 3046 on this =
topic.</FONT></P>

<P><FONT SIZE=3D2>Come to think of it, it looks like this draft =
re-iterates a bunch of wording that is already in RFC 2131 (such =
as:</FONT>
</P>

<P><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
When allocating a new address, servers SHOULD check that =
the&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
offered network address is not already in use; e.g., the </FONT>
<BR><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
server may probe the offered address with an ICMP Echo Request.&nbsp; =
</FONT>
<BR><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Servers SHOULD be implemented so that network administrators </FONT>
<BR><FONT =
SIZE=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
MAY choose to disable probes of newly allocated addresses. </FONT>
</P>

<P><FONT SIZE=3D2>).&nbsp; Does this really need to be restated, or =
would a reference back to the &quot;normal&quot; DHCP behaviour as =
defined in RFC 2131 be sufficient?</FONT></P>
<BR>

<P><FONT SIZE=3D2>Section 4:</FONT>
</P>

<P><FONT SIZE=3D2>This states that a client SHOULD include this option =
in a discover if it's prepared to perform the DISCOVER-ACK =
exchange.&nbsp; Shouldn't that be a MUST since there is that if clause =
at the end?</FONT></P>
<BR>

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From dhcwg-admin@ietf.org  Tue Apr 20 13:41:41 2004
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Subject: RE: [dhcwg] Question about 3315id-for-v4
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From: "Situ, Kevin" <Kevin.Situ@FMR.COM>
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We are running into an issue with multiple vendors using option 43.  We
use Lucent DHCP that do not support vender class ID in option 43, which
only can store the value without Vendor class ID. We have a work around
by having multiples scope in the subnet,  But we try to  use one
template and one scope.  Does any have any suggestion

Thanks

Kevin =20

-----Original Message-----
From: Ralph Droms [mailto:rdroms@cisco.com]=20
Sent: Tuesday, April 20, 2004 11:59 AM
To: dhcwg@ietf.org
Subject: [dhcwg] Question about 3315id-for-v4


It seems one of the motivations for draft-ietf-dhc-3315id-for-v4 is to
specify a way in which a dual-stack host can use the same identifier in
DHCPv4 and in DHCPv6.  A uniform identifier for both versions of DHCP
would be useful in the DHCID RR when detecting and reconciling DNS name
clashes.

So, is there consensus that draft-ietf-dhc-3315id-for-v4 should be
designed to support the consistent identification of a host in a DHCID
RR regardless of whether the host uses DHCPv4 or DHCPv6?

If the answer is yes, how can that consistent identification be
achieved?  I think the identifier in the latest revision of
draft-ietf-dhc-3315id-for-v4 could be used, if the DHCP server and the
client agree to use only the DUID in the DHCID RR.  However, I think it
would be better to avoid requiring the DHCPv4 server to parse the
3315id-for-v4 client identifier for use in the DHCID RR.  Is there some
other way in which the use of the DHCID RR can be defined to avoid
requiring the parsing of any client identification (either DHCpv4 or
DHCPv6)?

- Ralph


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From dhcwg-admin@ietf.org  Tue Apr 20 14:57:23 2004
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To: <dhcwg@ietf.org>
Subject: RE: [dhcwg] dhc WG last call on  draft-ietf-dhc-proxyserver-opt-00
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I support the proposed change to carry a list or servers
rather than multiple instances of a single-server-only
suboption

--Barr


> -----Original Message-----
> From: Ralph Droms
> Sent: Tuesday, 20 April 2004 08:20
>
> Ted and I both made the same suggestion about
> carrying a list of servers in
> one instance of the suboption, rather than
> multiple instances of the same
> suboption each carrying one server.  Is this
> change acceptable to the WG
> (please respond yes or no)?
>
>


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From dhcwg-admin@ietf.org  Tue Apr 20 15:09:25 2004
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I agree with Bernie's suggestion, but hope that the final
text includes BOTH a drawing of the proposed option AND one
or two examples.

--Barr

example:

         1     2          4                8        10
  +------+-----+----------+----- ... ------+---------+---
...
  |Option| Len |Proto Nbr.|Proxy IP Address|Port Nbr.|
  +------+-----+----------+----- ... ------+---------+---
...
               /<-------- First Proxy Tuple -------->/

   Option Header:  option-code: (TBD), Len: 24 (octets)
     Proxy for HTTP: Proto: 80, Proxy IP:
http-proxy-server-1, Port: 8080
     Proxy for HTTP: Proto: 80, Proxy IP:
http-proxy-server-2, Port: 8080
     Proxy for FTP:  Proto: 21, Proxy IP:
ftp-proxy-server-1,  Port: 21


> -----Original Message-----
> From: Ralph Droms
> Sent: Tuesday, 20 April 2004 08:21
>
> Bernie made a suggestion about the syntax of the
> option.  Any comment from
> the WG?
>
> - Ralph
>
> At 01:52 PM 4/12/2004 -0400, Bernie Volz wrote:
> >Perhaps this has been discussed in the past and
> discarded, but what
> >about removing the need for yet-another-list? If
> the option where
> >changed not to use sub-options at all but
> instead carried tuples of:
> >         2-octets of well-known protocol number
> >         4-octets of proxy server internet address
> >         2-octets of proxy server port number
> >The option length would then be multiples of 8 bytes.
> >
> >For example:
> >         Option Header:  TBD-option-code,24-bytes
> >         Proxy for HTTP: 80,http-proxy-server-1,8080
> >         Proxy for HTTP: 80,http-proxy-server-2,8080
> >         Proxy for FTP:  21,ftp-proxy-server-1,21
> >
> >This avoids the need for future protocols to
> have an enumeration and the
> >current "getservicename" calls can be used to
> find the port numbers.
> >
> >Otherwise, I recommend moving this draft forward.
> >
>


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From dhcwg-admin@ietf.org  Tue Apr 20 21:03:22 2004
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From: Ted Lemon <mellon@fugue.com>
Subject: Re: [dhcwg] Question about 3315id-for-v4
Date: Tue, 20 Apr 2004 17:35:28 -0700
To: Ralph Droms <rdroms@cisco.com>
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On Apr 20, 2004, at 8:58 AM, Ralph Droms wrote:
> Is there some other way in which the use of the DHCID RR can be
> defined to avoid requiring the parsing of any client identification 
> (either
> DHCpv4 or DHCPv6)?

No.   During the last call both Bernie and Barr expressed a wish that 
we could do this, and we discussed and rejected a method for doing 
this.   The problem is that the only way to make it so the server 
doesn't have to parse the identifier is to add an additional identifier 
option, and if we do that, clients supporting the new identifier style 
will not interoperate with servers that do not in some cases.

The only objection I can think of to the server parsing the client 
identifier option is that we have historically said the client 
identifier is opaque.   However, there is a good reason to break with 
this tradition, and I don't see how doing so would create an 
interoperability problem.   So if we try to keep this tradition, we 
break interoperability with old servers.   If we break this tradition, 
we do not.   So I think we have to use the IAID+DUID form of the client 
identifier option, and not add a separate IAID option.


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From dhcwg-admin@ietf.org  Wed Apr 21 01:25:43 2004
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Date: Wed, 21 Apr 2004 14:13:23 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt
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Thanks Kostur and see my inline comments.

>Section 3.1: 
>The first step says "The client broadcasts a DHCPDISCOVER 
>mess on its local physical."  Physical what?  Interface, I presume?

To sync current term. we wrote " physical subnet " 
I guess subnet is omitted... sorry.

>The second step talks about using the client identifier or chaddr 
>plus assigned network address as the identifier for the lease.  
>I believe this puts it in conflict with RFC 2131 (which talks about
using
>a subnet address, not necessarily the address of the lease), and 
>RFC 3046 which adds in the Remote ID.  I believe that this draft should

>probably reference RFC 3046 on this topic.

I am not sure why it occurs confliction with RFC2131.

>Come to think of it, it looks like this draft re-iterates a bunch of
wording 
>that is already in RFC 2131... 
>Does this really need to be restated, or would a reference back to the 
>"normal" DHCP behaviour as defined in RFC 2131 be sufficient?

As stated, I also think it is not significant issue. I am citing
Bernie's
response as below:

I'm pretty neutral on the issue of whether or not to copy text from
2131. When we eventually revise 2131, I believe we'd incorporate this
capability (rapid commit) into the revised 2131 text so I don't think it
is a significant issue. We could remove the text for those steps where
there are no differences (such as step 4 - only) and replace it with
"see RFC 2131". But, this may just increase the confusion (or at least
complexity of following the flow)?

Thought ? or we still need to remove it ?

>Section 4: 
>This states that a client SHOULD include this option in a discover if
it's 
>prepared to perform the DISCOVER-ACK exchange.  Shouldn't that be 
>a MUST since there is that if clause at the end?

I thought MUST is too hard, but I have no hard stance to replace it
if we agree that.



- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 


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From: "S. Daniel Park" <soohong.park@samsung.com>
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fyi... comments/feedbacks are highly welcome.


- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: i-d-announce-admin@ietf.org 
> [mailto:i-d-announce-admin@ietf.org] On Behalf Of 
> Internet-Drafts@ietf.org
> Sent: Wednesday, April 21, 2004 4:49 AM
> To: i-d-announce@ietf.org
> Subject: I-D ACTION:draft-daniel-dhc-ipv6in4-opt-03.txt
> 
> 
> A New Internet-Draft is available from the on-line 
> Internet-Drafts directories.
> 
> 
> 	Title		: DHCP Option for Configuring IPv6-in-IPv4
Tunnels
> 	Author(s)	: P. Kim, S. Park
> 	Filename	: draft-daniel-dhc-ipv6in4-opt-03.txt
> 	Pages		: 8
> 	Date		: 2004-4-20
> 	
> This document provides a mechanism by which the DHCPv4 
> servers can     
> provide information about the configured IPv6-in-IPv4 tunnel     
> end-points.  The IPv4/IPv6 dual-stack nodes can use this     
> information to set up a configured tunnel to the tunnel end-point     
> to obtain IPv6 connectivity.
> 
> A URL for this Internet-Draft is:
>
http://www.ietf.org/internet-drafts/draft-daniel-dhc-ipv6in4-opt-03.txt



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<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">fyi... comments/feedbacks are highly welcome.</FONT></SPAN>
</P>
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<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">- Daniel (Soohong Daniel Park)</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">- Mobile Platform Laboratory, SAMSUNG Electronics. </FONT></SPAN>
</P>

<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; -----Original Message-----</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; From: i-d-announce-admin@ietf.org </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; [</FONT></SPAN><A HREF="mailto:i-d-announce-admin@ietf.org"><SPAN LANG="ko"><U><FONT COLOR="#0000FF" SIZE=2 FACE="&#44404;&#47548;">mailto:i-d-announce-admin@ietf.org</FONT></U></SPAN></A><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">] On Behalf Of </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; Internet-Drafts@ietf.org</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; Sent: Wednesday, April 21, 2004 4:49 AM</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; To: i-d-announce@ietf.org</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; Subject: I-D ACTION:draft-daniel-dhc-ipv6in4-opt-03.txt</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; A New Internet-Draft is available from the on-line </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; Internet-Drafts directories.</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Title&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : DHCP Option for Configuring IPv6-in-IPv4 Tunnels</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Author(s)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : P. Kim, S. Park</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : draft-daniel-dhc-ipv6in4-opt-03.txt</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Pages&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 8</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Date&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 2004-4-20</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; This document provides a mechanism by which the DHCPv4 </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; servers can&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; provide information about the configured IPv6-in-IPv4 tunnel&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; end-points.&nbsp; The IPv4/IPv6 dual-stack nodes can use this&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; information to set up a configured tunnel to the tunnel end-point&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; to obtain IPv6 connectivity.</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; A URL for this Internet-Draft is:</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN><A HREF="http://www.ietf.org/internet-drafts/draft-daniel-dhc-ipv6in4-opt-03.txt"><SPAN LANG="ko"><U><FONT COLOR="#0000FF" SIZE=2 FACE="&#44404;&#47548;">http://www.ietf.org/internet-drafts/draft-daniel-dhc-ipv6in4-opt-03.txt</FONT></U></SPAN></A><SPAN LANG="ko"></SPAN>
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From: "Kostur, Andre" <akostur@incognito.com>
To: "'S. Daniel Park'" <soohong.park@samsung.com>,
        "Kostur, Andre"
	 <akostur@incognito.com>, dhcwg@ietf.org
Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt
Date: Tue, 20 Apr 2004 22:59:35 -0700
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> From: S. Daniel Park [mailto:soohong.park@samsung.com]
> Sent: Tuesday, April 20, 2004 10:13 PM
> To: 'Kostur, Andre'; dhcwg@ietf.org
> Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt
>  
> Thanks Kostur and see my inline comments.
> 
> >The second step talks about using the client identifier or chaddr 
> >plus assigned network address as the identifier for the lease.  
> >I believe this puts it in conflict with RFC 2131 (which talks about
> using
> >a subnet address, not necessarily the address of the lease), and 
> >RFC 3046 which adds in the Remote ID.  I believe that this 
> draft should
> 
> >probably reference RFC 3046 on this topic.
> 
> I am not sure why it occurs confliction with RFC2131.

Maybe "conflict" is too strong of a word...

I guess to me specifying the lease address implies that a unique identifier
(ClientID/CHADDR + RemoteID) may have multiple leases on the same subnet.
By specifying a subnet address instead, this implies that a unique
identifier may have only one lease on a subnet.  If a client wished to have
multiple leases on the same subnet, then it would need to mutate it's client
ID, and thus effectively becoming a distinct client (from the DHCP server's
point of view).

> >Section 4: 
> >This states that a client SHOULD include this option in a discover if
> it's 
> >prepared to perform the DISCOVER-ACK exchange.  Shouldn't that be 
> >a MUST since there is that if clause at the end?
> 
> I thought MUST is too hard, but I have no hard stance to replace it
> if we agree that.

I think that SHOULD is too loose in this case.  The statement is modified by
saying "if the device is prepared to perform the DISCOVER-ACK exchange".
With a SHOULD this would imply that the device may be prepared to perform
the DISCOVER-ACK exchange, but isn't required to supply the Rapid Commit
option.  Which would lead to the question of how else would the device
inform the server that it is prepared to do Rapid Commit?

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charset=3Diso-8859-1">
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<TITLE>RE: [dhcwg] I-D =
ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt</TITLE>
</HEAD>
<BODY>

<P><FONT SIZE=3D2>&gt; From: S. Daniel Park [<A =
HREF=3D"mailto:soohong.park@samsung.com">mailto:soohong.park@samsung.com=
</A>]</FONT>
<BR><FONT SIZE=3D2>&gt; Sent: Tuesday, April 20, 2004 10:13 PM</FONT>
<BR><FONT SIZE=3D2>&gt; To: 'Kostur, Andre'; dhcwg@ietf.org</FONT>
<BR><FONT SIZE=3D2>&gt; Subject: RE: [dhcwg] I-D =
ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt</FONT>
<BR><FONT SIZE=3D2>&gt;&nbsp; </FONT>
<BR><FONT SIZE=3D2>&gt; Thanks Kostur and see my inline =
comments.</FONT>
<BR><FONT SIZE=3D2>&gt; </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;The second step talks about using the =
client identifier or chaddr </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;plus assigned network address as the =
identifier for the lease.&nbsp; </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;I believe this puts it in conflict with RFC =
2131 (which talks about</FONT>
<BR><FONT SIZE=3D2>&gt; using</FONT>
<BR><FONT SIZE=3D2>&gt; &gt;a subnet address, not necessarily the =
address of the lease), and </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;RFC 3046 which adds in the Remote ID.&nbsp; =
I believe that this </FONT>
<BR><FONT SIZE=3D2>&gt; draft should</FONT>
<BR><FONT SIZE=3D2>&gt; </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;probably reference RFC 3046 on this =
topic.</FONT>
<BR><FONT SIZE=3D2>&gt; </FONT>
<BR><FONT SIZE=3D2>&gt; I am not sure why it occurs confliction with =
RFC2131.</FONT>
</P>

<P><FONT SIZE=3D2>Maybe &quot;conflict&quot; is too strong of a =
word...</FONT>
</P>

<P><FONT SIZE=3D2>I guess to me specifying the lease address implies =
that a unique identifier (ClientID/CHADDR + RemoteID) may have multiple =
leases on the same subnet.&nbsp; By specifying a subnet address =
instead, this implies that a unique identifier may have only one lease =
on a subnet.&nbsp; If a client wished to have multiple leases on the =
same subnet, then it would need to mutate it's client ID, and thus =
effectively becoming a distinct client (from the DHCP server's point of =
view).</FONT></P>

<P><FONT SIZE=3D2>&gt; &gt;Section 4: </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;This states that a client SHOULD include =
this option in a discover if</FONT>
<BR><FONT SIZE=3D2>&gt; it's </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;prepared to perform the DISCOVER-ACK =
exchange.&nbsp; Shouldn't that be </FONT>
<BR><FONT SIZE=3D2>&gt; &gt;a MUST since there is that if clause at the =
end?</FONT>
<BR><FONT SIZE=3D2>&gt; </FONT>
<BR><FONT SIZE=3D2>&gt; I thought MUST is too hard, but I have no hard =
stance to replace it</FONT>
<BR><FONT SIZE=3D2>&gt; if we agree that.</FONT>
</P>

<P><FONT SIZE=3D2>I think that SHOULD is too loose in this case.&nbsp; =
The statement is modified by saying &quot;if the device is prepared to =
perform the DISCOVER-ACK exchange&quot;.&nbsp; With a SHOULD this would =
imply that the device may be prepared to perform the DISCOVER-ACK =
exchange, but isn't required to supply the Rapid Commit option.&nbsp; =
Which would lead to the question of how else would the device inform =
the server that it is prepared to do Rapid Commit?</FONT></P>

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From dhcwg-admin@ietf.org  Wed Apr 21 04:01:06 2004
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Date: Wed, 21 Apr 2004 16:49:35 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
Subject: RE: [dhcwg] Design team for automated address management
In-reply-to: <4.3.2.7.2.20040420120119.02f474d0@flask.cisco.com>
To: "'Ralph Droms'" <rdroms@cisco.com>, dhcwg@ietf.org
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I am not sure why we need this option to allocate
its required address block in the IPv6 address 
architecture. It seems to be duplicated with current 
prefix delegation mechanism (3633) because a 
requesting router can set its preference for the size 
of the prefix to be delegated in this mechanism. 
I don't have a hard stance on the IPv4 at this stage.

Particularly, I myself am so curious whether it is a 
real dhc charter scope or not because it applies to 
router configuration rather than host configuration as 
ralph stated previous. I am also suffering from this
assumption on the router tunnel auto-configuration.

Nevertheless, DT's analysis would be useful for me (us ?)

Thanks.

- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On 
> Behalf Of Ralph Droms
> Sent: Wednesday, April 21, 2004 1:09 AM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Design team for automated address management
> 
> 
> At the WG meeting in Seoul, I promised to "arrange for a discussion to
> reconcile this option with DHCPv6 prefix delegation and 
> earlier ODAP work."
> I would like to identify a small team of volunteers to take 
> up this issue
> and review draft-shen-dhc-block-alloc-01, earlier work on 
> ODAP and DHCPv6
> prefix delegation.  The result of this review will include an 
> analysis of
> the similarities and differences between the various proposals, a
> description of the automated address management problem space and
> recommendations for work on DHCP required in that space.
> 
> I would like to get at least one author from each of the drafts on the
> design team and, of course, other volunteers are welcome.
> 
> - Ralph
> 
> 
> 
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
> 


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From dhcwg-admin@ietf.org  Wed Apr 21 10:06:46 2004
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Date: Wed, 21 Apr 2004 09:42:49 -0400
To: dhcwg@ietf.org
From: Ralph Droms <rdroms@cisco.com>
Subject: Re: [dhcwg] Question about 3315id-for-v4
In-Reply-To: <C9E790A8-932B-11D8-AE44-000A95D9C74C@fugue.com>
References: <4.3.2.7.2.20040420115100.01f91588@flask.cisco.com>
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Ted - I looked back through the last call e-mail and found the specifics:

www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03389.html
www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03283.html
www1.ietf.org/mail-archive/working-groups/dhcwg/current/msg03284.html

I missed the subtleties of the discussion; others might have, too, as the
discussion was pretty brief.

Now that we see the tie-in between 3315id-for-v4 and the DHCID RR, I think
we need to get a more definitive statement about how a server users
3315id-for-v4 identifiers with the DHCID RR.  We also need to get a more
detailed evaluation of the backward-compatibility issues, if 3315id-for-v4
will require changes in server behavior (for parsing the IAID+DUID).  Are
other server vendors comfortable with the effect of 3315id-for-v4 on
currently deployed servers?

- Ralph




At 05:35 PM 4/20/2004 -0700, Ted Lemon wrote:
>On Apr 20, 2004, at 8:58 AM, Ralph Droms wrote:
>>Is there some other way in which the use of the DHCID RR can be
>>defined to avoid requiring the parsing of any client identification (either
>>DHCpv4 or DHCPv6)?
>
>No.   During the last call both Bernie and Barr expressed a wish that we 
>could do this, and we discussed and rejected a method for doing 
>this.   The problem is that the only way to make it so the server doesn't 
>have to parse the identifier is to add an additional identifier option, 
>and if we do that, clients supporting the new identifier style will not 
>interoperate with servers that do not in some cases.
>
>The only objection I can think of to the server parsing the client 
>identifier option is that we have historically said the client identifier 
>is opaque.   However, there is a good reason to break with this tradition, 
>and I don't see how doing so would create an interoperability 
>problem.   So if we try to keep this tradition, we break interoperability 
>with old servers.   If we break this tradition, we do not.   So I think we 
>have to use the IAID+DUID form of the client identifier option, and not 
>add a separate IAID option.


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From dhcwg-admin@ietf.org  Wed Apr 21 18:45:42 2004
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From: "Richard Barr Hibbs" <rbhibbs@pacbell.net>
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Subject: FW: [dhcwg] Question about 3315id-for-v4
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-----Original Message-----
From: Richard Barr Hibbs [mailto:rbhibbs@pacbell.net]
Sent: Wednesday, 21 April 2004 09:13
To: Ted Lemon
Subject: RE: [dhcwg] Question about 3315id-for-v4



comments in-line

--Barr


> -----Original Message-----
> From: Ted Lemon
> Sent: Tuesday, 20 April 2004 17:35
>
> On Apr 20, 2004, at 8:58 AM, Ralph Droms wrote:
> > Is there some other way in which the use of the
> > DHCID RR can be defined to avoid requiring the
> > parsing of any client identification (either
> > DHCpv4 or DHCPv6)?
>
> No.   During the last call both Bernie and Barr
> expressed a wish that we could do this, and we
> discussed and rejected a method for doing this.
> The problem is that the only way to make it so
> the server doesn't have to parse the identifier
> is to add an additional identifier option, and
> if we do that, clients supporting the new
> identifier style will not interoperate with
> servers that do not in some cases.
>
...I'll take another look at the DHCID RR, the DNS update
I-D, and the proposed change to the client identifier today
to see if we may have been too quick to reject proposed
solutions.


> The only objection I can think of to the server
> parsing the client identifier option is that we
> have historically said the client identifier is
> opaque.  However, there is a good reason to
> break with this tradition, and I don't see how
> doing so would create an interoperability
> problem.  So if we try to keep this tradition,
> we break interoperability with old servers.  If
> we break this tradition, we do not.   So I
> think we have to use the IAID+DUID form of the
> client identifier option, and not add a separate
> IAID option.
>
...I don't believe that we have ever identified a good
reason why the client identifier MUST be an opaque value,
save that it does simplify one aspect of interoperability:
if the value is opaque, it can be changed by the client for
any reason, especially convenience, without worrying how a
server will react to the change.

So, if I may restate the issue, "Do we want a client
identifier that contains no data that can be processed by
the server to glean any information about the client, such
as additional qualification similar to vendor or user class
information, or not?"

There are really two competing philosophies here:  (1) keep
the size of the packet (and number of options sent/received)
as small as possible by avoiding duplicated or overlapping
data; and (2) maintain absolute clarity as to the purpose
and interpretation of every option by having one and only
one use for each.  Both are valid perspectives, but I lean a
bit towards the second because of the Law of Unintended
Consequences, which in this case would suggest that changing
the client identifier will have some as yet unforeseen
complication.


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From dhcwg-admin@ietf.org  Wed Apr 21 20:14:11 2004
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From: "Carr, Robert J SAJ Contractor" <Robert.J.Carr@saj02.usace.army.mil>
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Subject: [dhcwg] Security help needed
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Is there any way to verify a mac address before handing out a DHCP Address
in a Windows 2003 environment WITHOUT using reservations????

thanks,

Rob


Robert Carr
Network Administration
(Contractor - (CNI) Datacom Sciences)
US Army Corp of Engineers / Jacksonville District
701 San Marco Blvd - IM Dept
Jacksonville, FL 32207
Ph: (904)232-1625 Cell (904) 673-9645


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<P><FONT SIZE=3D2 FACE=3D"Arial">Is there any way to verify a mac =
address before handing out a DHCP Address in a Windows 2003 environment =
WITHOUT using reservations????</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">thanks,</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Rob</FONT>
</P>
<BR>

<P><B><FONT SIZE=3D2 FACE=3D"Tahoma">Robert Carr</FONT></B>
<BR><B><FONT SIZE=3D1 FACE=3D"Tahoma">Network Administration</FONT></B>
<BR><FONT SIZE=3D1 FACE=3D"Tahoma">(Contractor - (CNI) Datacom =
Sciences)</FONT>
<BR><FONT SIZE=3D1 FACE=3D"Tahoma">US Army Corp of Engineers / =
Jacksonville District</FONT>
<BR><FONT SIZE=3D1 FACE=3D"Tahoma">701 San Marco Blvd - IM Dept</FONT>
<BR><FONT SIZE=3D1 FACE=3D"Tahoma">Jacksonville, FL 32207</FONT>
<BR><FONT SIZE=3D1 FACE=3D"Tahoma">Ph: (904)232-1625 Cell (904) =
673-9645</FONT>
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From dhcwg-admin@ietf.org  Wed Apr 21 20:15:55 2004
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Subject: [dhcwg] Reviewing draft-lemon-dhcpv4-to-v6-id-trans.txt
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I reviewed the draft draft-lemon-dhcpv4-to-v6-id-trans.txt and I came
across three points that either need slight clarification or wording.

With these changes I support the advancement of this draft:

A minor nit, in "3.1. Do Nothing" there is a small typo:

   - Once the old lease has expired, these resources (particularly the
   - client's domain name) will be available for any client to claim.

Should probably be:

   - Once the old lease has expired, these resources (particularly the
     client's domain name) will be available for any client to claim.

In section "3.2. Propose New Identifier in DHCPREQUEST"

It discusses sending a DHCPRELEASE followed by DHCPDISCOVER to reclaim
the resources associated with the old lease when attempting to move the
lease to the new client identifier. 

Since there is no confirmation on a DHCPRELEASE suceedint and it may
take some small but not insignificant time for the server to release the
resources (in particular the ddns update) specifying a small delay
between the DHCPRELEASE and the DHCPDISCOVER is probably a good idea.

In section "3.4. Probe for Leases Under Old Identifier"

Where it says "Leases that are acquired during the probing process are
never _added_ to the list of leases needing to be converted" perhaps;
get rid of the emphasized 'added' and say: "Leases that are acquired
during the probing process MUST NOT be added to the list of leases
needing to be converted." This makes it a rule requiring explicit
conformance.

Also, where it says: "The advantage is that it is completely compatible
with the solution proposed in section 3.2, which means that the
implementor has the option of implementing either proposal" -- you mean
implementor of the server, right? The implementation of the client is
obviously different between 3.2 and 3.4.

-- Scanner       (scanner@nominum.com)
   Nominum, Inc. | www.nominum.com | +1.650.779.6035

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I reviewed the draft draft-lemon-dhcpv4-to-v6-id-trans.txt and I came
across three points that either need slight clarification or wording.

With these changes I support the advancement of this draft:

A minor nit, in "3.1. Do Nothing" there is a small typo:

   - Once the old lease has expired, these resources (particularly the
   - client's domain name) will be available for any client to claim.

Should probably be:

   - Once the old lease has expired, these resources (particularly the
     client's domain name) will be available for any client to claim.

In section "3.2. Propose New Identifier in DHCPREQUEST"

It discusses sending a DHCPRELEASE followed by DHCPDISCOVER to reclaim
the resources associated with the old lease when attempting to move the
lease to the new client identifier. 

Since there is no confirmation on a DHCPRELEASE suceedint and it may
take some small but not insignificant time for the server to release the
resources (in particular the ddns update) specifying a small delay
between the DHCPRELEASE and the DHCPDISCOVER is probably a good idea.

In section "3.4. Probe for Leases Under Old Identifier"

Where it says "Leases that are acquired during the probing process are
never _added_ to the list of leases needing to be converted" perhaps;
get rid of the emphasized 'added' and say: "Leases that are acquired
during the probing process MUST NOT be added to the list of leases
needing to be converted." This makes it a rule requiring explicit
conformance.

Also, where it says: "The advantage is that it is completely compatible
with the solution proposed in section 3.2, which means that the
implementor has the option of implementing either proposal" -- you mean
implementor of the server, right? The implementation of the client is
obviously different between 3.2 and 3.4.

-- Scanner       (scanner@nominum.com)
   Nominum, Inc. | www.nominum.com | +1.650.779.6035

_______________________________________________
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From dhcwg-admin@ietf.org  Wed Apr 21 20:26:17 2004
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Subject: [dhcwg] Reviewing draft-lemon-dhcpv4-to-v6-id-trans.txt
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I reviewed the draft draft-lemon-dhcpv4-to-v6-id-trans.txt and I came
across three points that either need slight clarification or wording.

With these changes I support the advancement of this draft:

A minor nit, in "3.1. Do Nothing" there is a small typo:

   - Once the old lease has expired, these resources (particularly the
   - client's domain name) will be available for any client to claim.

Should probably be:

   - Once the old lease has expired, these resources (particularly the
     client's domain name) will be available for any client to claim.

In section "3.2. Propose New Identifier in DHCPREQUEST"

It discusses sending a DHCPRELEASE followed by DHCPDISCOVER to reclaim
the resources associated with the old lease when attempting to move the
lease to the new client identifier. 

Since there is no confirmation on a DHCPRELEASE suceedint and it may
take some small but not insignificant time for the server to release the
resources (in particular the ddns update) specifying a small delay
between the DHCPRELEASE and the DHCPDISCOVER is probably a good idea.

In section "3.4. Probe for Leases Under Old Identifier"

Where it says "Leases that are acquired during the probing process are
never _added_ to the list of leases needing to be converted" perhaps;
get rid of the emphasized 'added' and say: "Leases that are acquired
during the probing process MUST NOT be added to the list of leases
needing to be converted." This makes it a rule requiring explicit
conformance.

Also, where it says: "The advantage is that it is completely compatible
with the solution proposed in section 3.2, which means that the
implementor has the option of implementing either proposal" -- you mean
implementor of the server, right? The implementation of the client is
obviously different between 3.2 and 3.4.

-- Scanner       (scanner@nominum.com)
   Nominum, Inc. | www.nominum.com | +1.650.779.6035

-- Scanner       (scanner@nominum.com)
   Nominum, Inc. | www.nominum.com | +1.650.779.6035

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From dhcwg-admin@ietf.org  Wed Apr 21 20:31:35 2004
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Subject: [dhcwg] Simple DHCP Client to get lease time
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Hello,

Can anybody help me out with simple DHCP Client in java. I just want to 
query lease time given an ip/mac address.



Whenever You Fall Pickup Something - Vishwesh

_________________________________________________________________
Need quick cash? http://go.msnserver.com/IN/46923.asp Click here !


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From dhcwg-admin@ietf.org  Wed Apr 21 22:31:14 2004
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From: "Bernie Volz" <volz@cisco.com>
To: "'S. Daniel Park'" <soohong.park@samsung.com>,
        "'Kostur, Andre'" <akostur@incognito.com>, <dhcwg@ietf.org>
Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt
Date: Wed, 21 Apr 2004 22:13:29 -0400
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The text in rapid-commit draft CAME from RFC 2131. It was essentially =
CUT
and PASTED from 2131 and then modified to include Rapid Commit related
processing. So, the text in step 2 (and 4) is exactly what is in 4 in =
2131.
We moved that text into step 2 because the same processing occurs for =
Rapid
Commit earlier. Step 4 in 2131 says "assigned network address", nothing
about "subnet address".

And, at the start of section 3.1 in the draft we say "The following is a
revised Section 3.1 of [RFC 2131] that includes handling of the Rapid =
Commit
option."

We don't want to revise any other processing in RFC 2131 except for =
adding
the Rapid Commit processing.

Thanks for catching the missing "subnet" word in Step 1. If there are =
any
other editting erros we've made, please do let us know. But if you have
issues with the text in 2131, please let Barr Hibbs know about them as =
he's
working to capture all the corrections that are needed in 2131.

I do think the text in section 4 should use MUST as if a client WANTs to =
use
this and is configured to allow its use, it *MUST* send the option =
otherwise
it has no hope of getting the server to do Rapid Commit. So, perhaps we
should can the text in Section 4 to:

          A client MUST include this option in a DHCPDISCOVER message=20
          if the client supports and intends to perform the
          DHCPDISCOVER-DHCPACK message exchange described earlier. =20

Text is thanks to earlier comments by Ralph (regarding section 3 in the =
01
draft).

- Bernie


> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On=20
> Behalf Of S. Daniel Park
> Sent: Wednesday, April 21, 2004 1:13 AM
> To: 'Kostur, Andre'; dhcwg@ietf.org
> Subject: RE: [dhcwg] I-D ACTION:draft-ietf-dhc-rapid-commit-opt-02.txt
>=20
>=20
> =20
> Thanks Kostur and see my inline comments.
>=20
> >Section 3.1:
> >The first step says "The client broadcasts a DHCPDISCOVER=20
> >mess on its local physical."  Physical what?  Interface, I presume?
>=20
> To sync current term. we wrote " physical subnet "=20
> I guess subnet is omitted... sorry.
>=20
> >The second step talks about using the client identifier or chaddr
> >plus assigned network address as the identifier for the lease. =20
> >I believe this puts it in conflict with RFC 2131 (which talks about
> using
> >a subnet address, not necessarily the address of the lease), and
> >RFC 3046 which adds in the Remote ID.  I believe that this=20
> draft should
>=20
> >probably reference RFC 3046 on this topic.
>=20
> I am not sure why it occurs confliction with RFC2131.
>=20
> >Come to think of it, it looks like this draft re-iterates a bunch of
> wording=20
> >that is already in RFC 2131...
> >Does this really need to be restated, or would a reference=20
> back to the=20
> >"normal" DHCP behaviour as defined in RFC 2131 be sufficient?
>=20
> As stated, I also think it is not significant issue. I am=20
> citing Bernie's response as below:
>=20
> I'm pretty neutral on the issue of whether or not to copy=20
> text from 2131. When we eventually revise 2131, I believe=20
> we'd incorporate this capability (rapid commit) into the=20
> revised 2131 text so I don't think it is a significant issue.=20
> We could remove the text for those steps where there are no=20
> differences (such as step 4 - only) and replace it with "see=20
> RFC 2131". But, this may just increase the confusion (or at=20
> least complexity of following the flow)?
>=20
> Thought ? or we still need to remove it ?
>=20
> >Section 4:
> >This states that a client SHOULD include this option in a discover if
> it's=20
> >prepared to perform the DISCOVER-ACK exchange.  Shouldn't that be
> >a MUST since there is that if clause at the end?
>=20
> I thought MUST is too hard, but I have no hard stance to=20
> replace it if we agree that.
>=20
>=20
>=20
> - Daniel (Soohong Daniel Park)
> - Mobile Platform Laboratory, SAMSUNG Electronics.=20
>=20
>=20
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
>=20


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From dhcwg-admin@ietf.org  Thu Apr 22 17:58:53 2004
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Subject: [dhcwg] Option 60 VCI
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Do all clients transmit option 60?  I am trying to separate devices on my
network and am looking to find out if linksys and other consumer routers
transmit option 60 as well as consumer and enterprise Aps like the Orinoco
AP1000.  I have my cable modems working with this method.  If there are any
other effective ways to do this, suggestions are appreciated.

Jake Howerton


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From dhcwg-admin@ietf.org  Thu Apr 22 18:50:13 2004
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No device is _required_ to send option 60.

Also, you don't mention what you're trying to accomplish by "separating your
devices".

> -----Original Message-----
> From: Jake Howerton [mailto:jake@nettera.net]
> Sent: Thursday, April 22, 2004 1:31 PM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Option 60 VCI
> 
> 
> Do all clients transmit option 60?  I am trying to separate 
> devices on my
> network and am looking to find out if linksys and other 
> consumer routers
> transmit option 60 as well as consumer and enterprise Aps 
> like the Orinoco
> AP1000.  I have my cable modems working with this method.  If 
> there are any
> other effective ways to do this, suggestions are appreciated.

------_=_NextPart_001_01C428B6.09DB1C50
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<TITLE>RE: [dhcwg] Option 60 VCI</TITLE>
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<P><FONT SIZE=2>No device is _required_ to send option 60.</FONT>
</P>

<P><FONT SIZE=2>Also, you don't mention what you're trying to accomplish by &quot;separating your devices&quot;.</FONT>
</P>

<P><FONT SIZE=2>&gt; -----Original Message-----</FONT>
<BR><FONT SIZE=2>&gt; From: Jake Howerton [<A HREF="mailto:jake@nettera.net">mailto:jake@nettera.net</A>]</FONT>
<BR><FONT SIZE=2>&gt; Sent: Thursday, April 22, 2004 1:31 PM</FONT>
<BR><FONT SIZE=2>&gt; To: dhcwg@ietf.org</FONT>
<BR><FONT SIZE=2>&gt; Subject: [dhcwg] Option 60 VCI</FONT>
<BR><FONT SIZE=2>&gt; </FONT>
<BR><FONT SIZE=2>&gt; </FONT>
<BR><FONT SIZE=2>&gt; Do all clients transmit option 60?&nbsp; I am trying to separate </FONT>
<BR><FONT SIZE=2>&gt; devices on my</FONT>
<BR><FONT SIZE=2>&gt; network and am looking to find out if linksys and other </FONT>
<BR><FONT SIZE=2>&gt; consumer routers</FONT>
<BR><FONT SIZE=2>&gt; transmit option 60 as well as consumer and enterprise Aps </FONT>
<BR><FONT SIZE=2>&gt; like the Orinoco</FONT>
<BR><FONT SIZE=2>&gt; AP1000.&nbsp; I have my cable modems working with this method.&nbsp; If </FONT>
<BR><FONT SIZE=2>&gt; there are any</FONT>
<BR><FONT SIZE=2>&gt; other effective ways to do this, suggestions are appreciated.</FONT>
</P>

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From dhcwg-admin@ietf.org  Thu Apr 22 19:42:08 2004
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Date: Thu, 22 Apr 2004 19:17:47 -0400
Subject: Re: [dhcwg] Option 60 VCI
From: Jake Howerton <jake@nettera.net>
To: <dhcwg@ietf.org>
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Andre,

Thanks for the response.  Do you know if most devices send this option or
most dont?  I am trying to capture the packets with ethereal but none of the
devices I have at my disposal at this moment currently seem to do it.
Unless I am approaching this incorrectly.  Someone told me what the cable
modems send so I didn't have to go through this discover process with them.

My purpose is basically for controlling the network.  In conjunction with
firewall rules I would basically like to ban certain devices and or limit
access for certain devices.  This is in residential apartment buildings for
instance I don't want people putting consumer wireless routers on their
cable modem and opening up holes in the network.  Or I want to keep access
points on a different subnet so wannabe hackers cant mess with them easily
from the subnet that client devices get assigned.

Jake


On 4/22/04 6:06 PM, "Kostur, Andre" <akostur@incognito.com> wrote:

> No device is _required_ to send option 60.
> 
> Also, you don't mention what you're trying to accomplish by "separating your
> devices". 


--B_3165506268_1094818
Content-type: text/html; charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

<HTML>
<HEAD>
<TITLE>Re: [dhcwg] Option 60 VCI</TITLE>
</HEAD>
<BODY>
<FONT FACE=3D"Verdana">Andre,<BR>
<BR>
Thanks for the response. &nbsp;Do you know if most devices send this option=
 or most dont? &nbsp;I am trying to capture the packets with ethereal but no=
ne of the devices I have at my disposal at this moment currently seem to do =
it. &nbsp;Unless I am approaching this incorrectly. &nbsp;Someone told me wh=
at the cable modems send so I didn't have to go through this discover proces=
s with them.<BR>
<BR>
My purpose is basically for controlling the network. &nbsp;In conjunction w=
ith firewall rules I would basically like to ban certain devices and or limi=
t access for certain devices. &nbsp;This is in residential apartment buildin=
gs for instance I don't want people putting consumer wireless routers on the=
ir cable modem and opening up holes in the network. &nbsp;Or I want to keep =
access points on a different subnet so wannabe hackers cant mess with them e=
asily from the subnet that client devices get assigned.<BR>
<BR>
Jake<BR>
<BR>
<BR>
On 4/22/04 6:06 PM, &quot;Kostur, Andre&quot; &lt;<FONT COLOR=3D"#0000FF"><U>=
akostur@incognito.com</U></FONT>&gt; wrote:<BR>
<BR>
</FONT><BLOCKQUOTE><FONT FACE=3D"Verdana"><FONT SIZE=3D"2">No device is _requir=
ed_ to send option 60.</FONT> <BR>
<BR>
<FONT SIZE=3D"2">Also, you don't mention what you're trying to accomplish by =
&quot;separating your devices&quot;.</FONT> <BR>
</FONT></BLOCKQUOTE>
</BODY>
</HTML>


--B_3165506268_1094818--


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From dhcwg-admin@ietf.org  Sun Apr 25 09:00:19 2004
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From: "Bernie Volz" <volz@cisco.com>
To: <dhcwg@ietf.org>
Subject: RE: [dhcwg] Results of WG last call on draft-ietf-dhc-reclassify-options
Date: Sun, 25 Apr 2004 08:49:06 -0400
Organization: Cisco
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I just submitted the revised draft that corrects the minor editorial =
changes
requested:
- References RFC 3679 instead of its earlier internet-draft.
- Uses the IPR text from RFC 3667.
- Changes first sentence in Background section per Ralph's =
recommendation.
- Updates author's address.
- Changed "Relay Agent Option" to "Relay Agent Information Option" (this =
was
not requested but is appropriate since that is what the option is =
called).
- Split references (into Informative/Normative).

It should show up in a few days.

- Bernie Volz

> -----Original Message-----
> From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On=20
> Behalf Of Ralph Droms
> Sent: Tuesday, April 20, 2004 11:37 AM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Results of WG last call on=20
> draft-ietf-dhc-reclassify-options
>=20
>=20
> draft-ietf-dhc-reclassify-options passed WG last call, but=20
> requires some minor editorial changes=20
> http://www1.ietf.org/mail-archive/working-groups/dhcwg/current
> /msg03411.html
> Once a revised version of the I-D has been published, it will=20
> be sent to the IESG for review.
>=20
> - Ralph
>=20
>=20
> _______________________________________________
> dhcwg mailing list
> dhcwg@ietf.org
> https://www1.ietf.org/mailman/listinfo/dhcwg
>=20


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To: "Bernie Volz" <volz@cisco.com>
From: Ralph Droms <rdroms@cisco.com>
Subject: RE: [dhcwg] Results of WG last call on
  draft-ietf-dhc-reclassify-options
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Thanks, Bernie.  I will submit the new draft to the IESG as soon as it appears.

- Ralph

At 08:49 AM 4/25/2004 -0400, Bernie Volz wrote:
>I just submitted the revised draft that corrects the minor editorial changes
>requested:
>- References RFC 3679 instead of its earlier internet-draft.
>- Uses the IPR text from RFC 3667.
>- Changes first sentence in Background section per Ralph's recommendation.
>- Updates author's address.
>- Changed "Relay Agent Option" to "Relay Agent Information Option" (this was
>not requested but is appropriate since that is what the option is called).
>- Split references (into Informative/Normative).
>
>It should show up in a few days.
>
>- Bernie Volz
>
> > -----Original Message-----
> > From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On
> > Behalf Of Ralph Droms
> > Sent: Tuesday, April 20, 2004 11:37 AM
> > To: dhcwg@ietf.org
> > Subject: [dhcwg] Results of WG last call on
> > draft-ietf-dhc-reclassify-options
> >
> >
> > draft-ietf-dhc-reclassify-options passed WG last call, but
> > requires some minor editorial changes
> > http://www1.ietf.org/mail-archive/working-groups/dhcwg/current
> > /msg03411.html
> > Once a revised version of the I-D has been published, it will
> > be sent to the IESG for review.
> >
> > - Ralph
> >
> >
> > _______________________________________________
> > dhcwg mailing list
> > dhcwg@ietf.org
> > https://www1.ietf.org/mailman/listinfo/dhcwg
> >
>
>
>_______________________________________________
>dhcwg mailing list
>dhcwg@ietf.org
>https://www1.ietf.org/mailman/listinfo/dhcwg


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: Reclassifying DHCPv4 Options
	Author(s)	: B. Volz
	Filename	: draft-ietf-dhc-reclassify-options-01.txt
	Pages		: 8
	Date		: 2004-4-26
	
This document revises RFC 2132 to reclassify DHCPv4 option codes 128
to 223 (decimal) as publicly defined options to be managed by IANA in
accordance with RFC 2939. This document directs IANA to make these
option codes available for assignment as publicly defined DHCP
options for future options.

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From dhcwg-admin@ietf.org  Tue Apr 27 18:29:39 2004
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From: Jake Howerton <jake@capanis.com>
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Subject: [dhcwg] Option 60 VCI
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Do all clients transmit option 60?  I am trying to separate devices on my
network and am looking to find out if linksys and other consumer routers
transmit option 60 as well as consumer and enterprise Aps like the Orinoco
AP1000.  I have my cable modems working with this method.  If there are any
other effective ways to do this, suggestions are appreciated.

Jake Howerton


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From dhcwg-admin@ietf.org  Tue Apr 27 18:57:13 2004
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From: "Kostur, Andre" <akostur@incognito.com>
To: "'Jake Howerton'" <jake@capanis.com>, dhcwg@ietf.org
Subject: RE: [dhcwg] Option 60 VCI
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You don't really mention in what way you want to separate your devices.  The
cable modems are easily identifiable since they are following the DOCSIS
specifications, and DOCSIS mandates that option 60 must be of a certain
form.  As far as I know there is no general requirement.  From a DHCP
standpoint there is no requirement that option 60 is sent at all.

> -----Original Message-----
> From: Jake Howerton [mailto:jake@capanis.com]
> Sent: Thursday, April 22, 2004 1:30 PM
> To: dhcwg@ietf.org
> Subject: [dhcwg] Option 60 VCI
> 
> 
> Do all clients transmit option 60?  I am trying to separate 
> devices on my
> network and am looking to find out if linksys and other 
> consumer routers
> transmit option 60 as well as consumer and enterprise Aps 
> like the Orinoco
> AP1000.  I have my cable modems working with this method.  If 
> there are any
> other effective ways to do this, suggestions are appreciated.

------_=_NextPart_001_01C42CA9.00C14DA0
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	charset="iso-8859-1"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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charset=3Diso-8859-1">
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5.5.2653.12">
<TITLE>RE: [dhcwg] Option 60 VCI</TITLE>
</HEAD>
<BODY>

<P><FONT SIZE=3D2>You don't really mention in what way you want to =
separate your devices.&nbsp; The cable modems are easily identifiable =
since they are following the DOCSIS specifications, and DOCSIS mandates =
that option 60 must be of a certain form.&nbsp; As far as I know there =
is no general requirement.&nbsp; From a DHCP standpoint there is no =
requirement that option 60 is sent at all.</FONT></P>

<P><FONT SIZE=3D2>&gt; -----Original Message-----</FONT>
<BR><FONT SIZE=3D2>&gt; From: Jake Howerton [<A =
HREF=3D"mailto:jake@capanis.com">mailto:jake@capanis.com</A>]</FONT>
<BR><FONT SIZE=3D2>&gt; Sent: Thursday, April 22, 2004 1:30 PM</FONT>
<BR><FONT SIZE=3D2>&gt; To: dhcwg@ietf.org</FONT>
<BR><FONT SIZE=3D2>&gt; Subject: [dhcwg] Option 60 VCI</FONT>
<BR><FONT SIZE=3D2>&gt; </FONT>
<BR><FONT SIZE=3D2>&gt; </FONT>
<BR><FONT SIZE=3D2>&gt; Do all clients transmit option 60?&nbsp; I am =
trying to separate </FONT>
<BR><FONT SIZE=3D2>&gt; devices on my</FONT>
<BR><FONT SIZE=3D2>&gt; network and am looking to find out if linksys =
and other </FONT>
<BR><FONT SIZE=3D2>&gt; consumer routers</FONT>
<BR><FONT SIZE=3D2>&gt; transmit option 60 as well as consumer and =
enterprise Aps </FONT>
<BR><FONT SIZE=3D2>&gt; like the Orinoco</FONT>
<BR><FONT SIZE=3D2>&gt; AP1000.&nbsp; I have my cable modems working =
with this method.&nbsp; If </FONT>
<BR><FONT SIZE=3D2>&gt; there are any</FONT>
<BR><FONT SIZE=3D2>&gt; other effective ways to do this, suggestions =
are appreciated.</FONT>
</P>

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From dhcwg-admin@ietf.org  Tue Apr 27 20:16:09 2004
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Date: Tue, 27 Apr 2004 19:04:27 -0400
Subject: Re: [dhcwg] Option 60 VCI
From: Jake Howerton <jake@capanis.com>
To: "Kostur, Andre" <akostur@incognito.com>, <dhcwg@ietf.org>
Message-ID: <BCB45F3B.B231%jake@capanis.com>
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Andre,

I am not having trouble seperating the cable modems since as you say they
are DOCSIS compatible and are sending option 60.  I was looking to put
wireless Aps and consumer routers onto separate subnets also.  This would
allow me to protect the Aps somewhat.  And would allow me to ban the use of
wireless routers putting holes in my network.  For the Aps I can enter the
MACs manually into separate pools, but the person who setup the network is
long gone.  And we have almost 1000 access points.  So I was looking for the
easy way out.    I have not figured out how to identify the consumer
wireless routers though.

Jake Howerton

On 4/27/04 6:43 PM, "Kostur, Andre" <akostur@incognito.com> wrote:

> You don't really mention in what way you want to separate your devices.  The
> cable modems are easily identifiable since they are following the DOCSIS
> specifications, and DOCSIS mandates that option 60 must be of a certain form.
> As far as I know there is no general requirement.  From a DHCP standpoint
> there is no requirement that option 60 is sent at all.
> 
>> > -----Original Message-----
>> > From: Jake Howerton [mailto:jake@capanis.com]
>> > Sent: Thursday, April 22, 2004 1:30 PM
>> > To: dhcwg@ietf.org
>> > Subject: [dhcwg] Option 60 VCI
>> > 
>> > 
>> > Do all clients transmit option 60?  I am trying to separate
>> > devices on my 
>> > network and am looking to find out if linksys and other
>> > consumer routers
>> > transmit option 60 as well as consumer and enterprise Aps
>> > like the Orinoco
>> > AP1000.  I have my cable modems working with this method.  If
>> > there are any 
>> > other effective ways to do this, suggestions are appreciated.
> 



--B_3165937467_26968508
Content-type: text/html; charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

<HTML>
<HEAD>
<TITLE>Re: [dhcwg] Option 60 VCI</TITLE>
</HEAD>
<BODY>
<FONT FACE=3D"Verdana">Andre,<BR>
<BR>
I am not having trouble seperating the cable modems since as you say they a=
re DOCSIS compatible and are sending option 60. &nbsp;I was looking to put w=
ireless Aps and consumer routers onto separate subnets also. &nbsp;This woul=
d allow me to protect the Aps somewhat. &nbsp;And would allow me to ban the =
use of wireless routers putting holes in my network. &nbsp;For the Aps I can=
 enter the MACs manually into separate pools, but the person who setup the n=
etwork is long gone. &nbsp;And we have almost 1000 access points. &nbsp;So I=
 was looking for the easy way out. &nbsp;&nbsp;&nbsp;I have not figured out =
how to identify the consumer wireless routers though.<BR>
<BR>
Jake Howerton<BR>
<BR>
On 4/27/04 6:43 PM, &quot;Kostur, Andre&quot; &lt;akostur@incognito.com&gt;=
 wrote:<BR>
<BR>
</FONT><BLOCKQUOTE><FONT FACE=3D"Verdana"><FONT SIZE=3D"2">You don't really men=
tion in what way you want to separate your devices. &nbsp;The cable modems a=
re easily identifiable since they are following the DOCSIS specifications, a=
nd DOCSIS mandates that option 60 must be of a certain form. &nbsp;As far as=
 I know there is no general requirement. &nbsp;From a DHCP standpoint there =
is no requirement that option 60 is sent at all.<BR>
</FONT><BR>
<FONT SIZE=3D"2">&gt; -----Original Message-----</FONT> <BR>
<FONT SIZE=3D"2">&gt; From: Jake Howerton [mailto:jake@capanis.com]</FONT> <B=
R>
<FONT SIZE=3D"2">&gt; Sent: Thursday, April 22, 2004 1:30 PM</FONT> <BR>
<FONT SIZE=3D"2">&gt; To: dhcwg@ietf.org</FONT> <BR>
<FONT SIZE=3D"2">&gt; Subject: [dhcwg] Option 60 VCI</FONT> <BR>
<FONT SIZE=3D"2">&gt; <BR>
&gt; <BR>
&gt; Do all clients transmit option 60? &nbsp;I am trying to separate <BR>
&gt; devices on my</FONT> <BR>
<FONT SIZE=3D"2">&gt; network and am looking to find out if linksys and other=
 <BR>
&gt; consumer routers</FONT> <BR>
<FONT SIZE=3D"2">&gt; transmit option 60 as well as consumer and enterprise A=
ps <BR>
&gt; like the Orinoco</FONT> <BR>
<FONT SIZE=3D"2">&gt; AP1000. &nbsp;I have my cable modems working with this =
method. &nbsp;If <BR>
&gt; there are any</FONT> <BR>
<FONT SIZE=3D"2">&gt; other effective ways to do this, suggestions are apprec=
iated.</FONT> <BR>
<BR>
</FONT></BLOCKQUOTE><FONT FACE=3D"Verdana"><BR>
</FONT>
</BODY>
</HTML>


--B_3165937467_26968508--


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Date: Wed, 28 Apr 2004 09:24:23 +0900
From: "S. Daniel Park" <soohong.park@samsung.com>
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fyi

comments/feedbacks are highly welcome


- Daniel (Soohong Daniel Park)
- Mobile Platform Laboratory, SAMSUNG Electronics. 

> A New Internet-Draft is available from the on-line 
> Internet-Drafts directories.
> 
> 
> 	Title		: Configured Tunnel End-Point Configuration
using DHCPv4
> 	Author(s)	: S. Park, et al.
> 	Filename	: draft-daniel-dhc-dhcpv4-tep-conf-00.txt
> 	Pages		: 13
> 	Date		: 2004-4-27
> 	
> The intent of this draft is to provide a solution to automate 
> tunnel      
>      end-point configuration for a configured IPv6-over-IPv4 
> tunnel. This      
>      uses a DHCPv4 option to percolate the tunnel end-point 
> configuration      
>      information. This is very useful to connect a newly 
> deployed native      
>      IPv6 cloud to other existing IPv6 networks using IPv4 
> backbone as 
>      well as to connect isolated dual-stack IPv4/IPv6 nodes to IPv6 
>      networks through IPv4.
> 
> A URL for this Internet-Draft is: 
http://www.ietf.org/internet-drafts/draft-daniel-dhc-dhcpv4-tep-conf-00.
txt

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<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">fyi</FONT></SPAN>
</P>

<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">comments/feedbacks are highly welcome</FONT></SPAN>
</P>
<BR>

<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">- Daniel (Soohong Daniel Park)</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">- Mobile Platform Laboratory, SAMSUNG Electronics. </FONT></SPAN>
</P>

<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; A New Internet-Draft is available from the on-line </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; Internet-Drafts directories.</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Title&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : Configured Tunnel End-Point Configuration using DHCPv4</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Author(s)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : S. Park, et al.</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Filename&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : draft-daniel-dhc-dhcpv4-tep-conf-00.txt</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Pages&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 13</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Date&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 2004-4-27</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; The intent of this draft is to provide a solution to automate </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; tunnel&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end-point configuration for a configured IPv6-over-IPv4 </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; tunnel. This&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; uses a DHCPv4 option to percolate the tunnel end-point </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; configuration&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; information. This is very useful to connect a newly </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; deployed native&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; IPv6 cloud to other existing IPv6 networks using IPv4 </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; backbone as </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; well as to connect isolated dual-stack IPv4/IPv6 nodes to IPv6 </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; networks through IPv4.</FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">&gt; A URL for this Internet-Draft is: </FONT></SPAN>

<BR><SPAN LANG="ko"></SPAN><A HREF="http://www.ietf.org/internet-drafts/draft-daniel-dhc-dhcpv4-tep-conf-00.txt"><SPAN LANG="ko"><U><FONT COLOR="#0000FF" SIZE=2 FACE="&#44404;&#47548;">http://www.ietf.org/internet-drafts/draft-daniel-dhc-dhcpv4-tep-conf-00.txt</FONT></U></SPAN></A><SPAN LANG="ko"></SPAN>
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<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">A list of Internet-Drafts directories can be found in </FONT></SPAN><A HREF="http://www.ietf.org/shadow.html"><SPAN LANG="ko"><U><FONT COLOR="#0000FF" SIZE=2 FACE="&#44404;&#47548;">http://www.ietf.org/shadow.html</FONT></U></SPAN></A><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;"> </FONT></SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">or </FONT></SPAN><A HREF="ftp://ftp.ietf.org/ietf/1shadow-sites.txt"><SPAN LANG="ko"><U><FONT COLOR="#0000FF" SIZE=2 FACE="&#44404;&#47548;">ftp://ftp.ietf.org/ietf/1shadow-sites.txt</FONT></U></SPAN></A><SPAN LANG="ko"></SPAN>
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<P><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">Send a message to:</FONT></SPAN>

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<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">In the body type:</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">&quot;FILE /internet-drafts/draft-daniel-dhc-dhcpv4-tep-conf-00.txt&quot;.</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">NOTE:&nbsp;&nbsp; The mail server at ietf.org can return the document in</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">MIME-encoded form by using the &quot;mpack&quot; utility.&nbsp; To use this</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">feature, insert the command &quot;ENCODING mime&quot; before the &quot;FILE&quot;</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">command.&nbsp; To decode the response(s), you will need &quot;munpack&quot; or</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">a MIME-compliant mail reader.&nbsp; Different MIME-compliant mail readers</FONT></SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">exhibit different behavior, especially when dealing with</FONT></SPAN>

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<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=2 FACE="&#44404;&#47548;">up into multiple messages), so check your local documentation on</FONT></SPAN>

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<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>

<BR><SPAN LANG="ko">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>

<BR><SPAN LANG="ko"><FONT SIZE=2 FACE="&#44404;&#47548;">Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft.<FONT FACE="&#44404;&#47548;" SIZE=2 COLOR="#000000"> &lt;&lt;...&gt;&gt; </FONT><FONT FACE="&#44404;&#47548;" SIZE=2 COLOR="#000000"> &lt;&lt;...&gt;&gt; </FONT></FONT></SPAN></P>

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From dhcwg-admin@ietf.org  Thu Apr 29 00:46:28 2004
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On Sun, 25 Apr 2004 dhcwg-request@ietf.org wrote:

> Send dhcwg mailing list submissions to
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> Today's Topics:
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>    1. RE: Results of WG last call on draft-ietf-dhc-reclassify-options (Bernie Volz)
>
> --__--__--
>
> Message: 1
> From: "Bernie Volz" <volz@cisco.com>
> To: <dhcwg@ietf.org>
> Subject: RE: [dhcwg] Results of WG last call on draft-ietf-dhc-reclassify-options
> Date: Sun, 25 Apr 2004 08:49:06 -0400
> Organization: Cisco
>
> I just submitted the revised draft that corrects the minor editorial =
> changes
> requested:
> - References RFC 3679 instead of its earlier internet-draft.
> - Uses the IPR text from RFC 3667.
> - Changes first sentence in Background section per Ralph's =
> recommendation.
> - Updates author's address.
> - Changed "Relay Agent Option" to "Relay Agent Information Option" (this =
> was
> not requested but is appropriate since that is what the option is =
> called).
> - Split references (into Informative/Normative).
>
> It should show up in a few days.
>
> - Bernie Volz
>
> > -----Original Message-----
> > From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On=20
> > Behalf Of Ralph Droms
> > Sent: Tuesday, April 20, 2004 11:37 AM
> > To: dhcwg@ietf.org
> > Subject: [dhcwg] Results of WG last call on=20
> > draft-ietf-dhc-reclassify-options
> >=20
> >=20
> > draft-ietf-dhc-reclassify-options passed WG last call, but=20
> > requires some minor editorial changes=20
> > http://www1.ietf.org/mail-archive/working-groups/dhcwg/current
> > /msg03411.html
> > Once a revised version of the I-D has been published, it will=20
> > be sent to the IESG for review.
> >=20
> > - Ralph
> >=20
> >=20
> > _______________________________________________
> > dhcwg mailing list
> > dhcwg@ietf.org
> > https://www1.ietf.org/mailman/listinfo/dhcwg
> >=20
>
>
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>
> --__--__--
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From dhcwg-admin@ietf.org  Thu Apr 29 16:23:49 2004
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Subject: [dhcwg] I-D ACTION:draft-ietf-dhc-v4-threat-analysis-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: Dynamic Host Configuration Protocol for IPv4 (DHCPv4) Threat Analysis
	Author(s)	: R. Hibbs, et al.
	Filename	: draft-ietf-dhc-v4-threat-analysis-02.txt
	Pages		: 15
	Date		: 2004-4-29
	
DHCPv4 (RFC 2131) is a stable, widely used protocol for configuration
of host systems in a TCP/IPv4 network.  It did not provide for
authentication of clients and servers, nor did it provide for data
confidentiality.  This is reflected in the original 'Security
Considerations' section of RFC 2131, which identifies a few threats
and leaves development of any defenses against those threats to
future work.  Beginning in about 1995 DHCP security began to attract
attention from the Internet community, eventually resulting in the
publication of RFC 3118 in 2001.  Although RFC 3118 was a mandatory
prerequisite for the DHCPv4 Reconfigure Extension, RFC 3203, it has
had no known usage by any commercial or private implementation since
its adoption.  The DHC Working Group has adopted a work item for 2003
to review and modify or replace RFC 3118 to afford a workable, easily
deployed security mechanism for DHCPv4.  This memo provides a
comprehensive threat analysis of the Dynamic Host Configuration
Protocol for use both as RFC 2131 advances from Draft Standard to
Full Standard and to support our chartered work improving the
acceptance and deployment of RFC 3118.

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http://www.ietf.org/internet-drafts/draft-ietf-dhc-v4-threat-analysis-02.txt

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From dhcwg-admin@ietf.org  Fri Apr 30 06:14:21 2004
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pl UNSUBSCRIBE THIS NEWS LETTER

THANKS


On Thu, 29 Apr 2004 dhcwg-request@ietf.org wrote:

> Send dhcwg mailing list submissions to
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> When replying, please edit your Subject line so it is more specific
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> Today's Topics:
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>    1. Re: dhcwg digest, Vol 1 #847 - 1 msg (T. A. Chandrappa)
>
> --__--__--
>
> Message: 1
> Date: Thu, 29 Apr 2004 10:03:56 +0530 (IST)
> From: "T. A. Chandrappa" <chandru@serc.iisc.ernet.in>
> To: dhcwg-request@ietf.org
> Cc: dhcwg@ietf.org
> Subject: [dhcwg] Re: dhcwg digest, Vol 1 #847 - 1 msg
>
> Pl unsubscribe this hereafter.
>
> Thanks
>
> On Sun, 25 Apr 2004 dhcwg-request@ietf.org wrote:
>
> > Send dhcwg mailing list submissions to
> > 	dhcwg@ietf.org
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> > 	https://www1.ietf.org/mailman/listinfo/dhcwg
> > or, via email, send a message with subject or body 'help' to
> > 	dhcwg-request@ietf.org
> >
> > You can reach the person managing the list at
> > 	dhcwg-admin@ietf.org
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of dhcwg digest..."
> >
> >
> > Today's Topics:
> >
> >    1. RE: Results of WG last call on draft-ietf-dhc-reclassify-options (Bernie Volz)
> >
> > -- __--__--
> >
> > Message: 1
> > From: "Bernie Volz" <volz@cisco.com>
> > To: <dhcwg@ietf.org>
> > Subject: RE: [dhcwg] Results of WG last call on draft-ietf-dhc-reclassify-options
> > Date: Sun, 25 Apr 2004 08:49:06 -0400
> > Organization: Cisco
> >
> > I just submitted the revised draft that corrects the minor editorial =
> > changes
> > requested:
> > - References RFC 3679 instead of its earlier internet-draft.
> > - Uses the IPR text from RFC 3667.
> > - Changes first sentence in Background section per Ralph's =
> > recommendation.
> > - Updates author's address.
> > - Changed "Relay Agent Option" to "Relay Agent Information Option" (this =
> > was
> > not requested but is appropriate since that is what the option is =
> > called).
> > - Split references (into Informative/Normative).
> >
> > It should show up in a few days.
> >
> > - Bernie Volz
> >
> > > -----Original Message-----
> > > From: dhcwg-admin@ietf.org [mailto:dhcwg-admin@ietf.org] On=20
> > > Behalf Of Ralph Droms
> > > Sent: Tuesday, April 20, 2004 11:37 AM
> > > To: dhcwg@ietf.org
> > > Subject: [dhcwg] Results of WG last call on=20
> > > draft-ietf-dhc-reclassify-options
> > >=20
> > >=20
> > > draft-ietf-dhc-reclassify-options passed WG last call, but=20
> > > requires some minor editorial changes=20
> > > http://www1.ietf.org/mail-archive/working-groups/dhcwg/current
> > > /msg03411.html
> > > Once a revised version of the I-D has been published, it will=20
> > > be sent to the IESG for review.
> > >=20
> > > - Ralph
> > >=20
> > >=20
> > > _______________________________________________
> > > dhcwg mailing list
> > > dhcwg@ietf.org
> > > https://www1.ietf.org/mailman/listinfo/dhcwg
> > >=20
> >
> >
> >
> >
> > -- __--__--
> >
> > _______________________________________________
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> > dhcwg@ietf.org
> > https://www1.ietf.org/mailman/listinfo/dhcwg
> >
> >
> > End of dhcwg Digest
> >
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>
>
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