Subject: Longer prefixes

From: Kurt Erik Lindqvist <[email-masked]>
Date: Sun, 23 Mar 2003 18:27:40 +0100

As there was some discussions in Atlanta on wether longer prefixes is 
actually in use today. This is just the first page of sh ipv6 route on 
one of my home routers :

IPv6 Routing Table - 438 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
        I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
Timers: Uptime/Expires

B   2001:200:126::/48 [20/6]
      via FE80::C15E:FA3A, Tunnel10, 02:22:30/never
B   2001:200:202::/48 [20/6]
      via FE80::C15E:FA3A, Tunnel10, 02:22:56/never
B   2001:200:203::/48 [20/6]
      via FE80::C15E:FA3A, Tunnel10, 4d01h/never
B   2001:200:200::/40 [20/5]
      via 2001:670:87:3001::, Tunnel10, 4d01h/never
B   2001:200:340::/48 [20/6]
      via FE80::C15E:FA3A, Tunnel10, 4d01h/never
B   2001:200:300::/40 [20/6]
      via FE80::C15E:FA3A, Tunnel10, 4d01h/never
B   2001:200:500::/40 [20/3]
      via FE80::C15E:FA3A, Tunnel10, 5d17h/never
B   2001:200::/35 [20/3]
      via 2001:670:87:3001::, Tunnel10, 3d03h/never
B   2001:208::/32 [20/5]
      via 2001:670:87:3001::, Tunnel10, 3d03h/never
B   2001:218::/32 [20/3]
      via 2001:670:87:3001::, Tunnel10, 1d06h/never
B   2001:220::/35 [20/4]
      via FE80::82F4:B4, Tunnel30, 02:51:25/never
B   2001:228:C00::/40 [20/5]
      via 2001:670:87:3001::, Tunnel10, 4d01h/never

It appears as if there are number of prefix lengths being in use.

Best regards,

- kurtis -

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From: Ole Troan <[email-masked]>
Date: Mon, 24 Mar 2003 00:05:51 +0000

> actually in use today. This is just the first page of sh ipv6 route on

ipv6-lab-gw>show ipv6 route summary
IPv6 Routing Table Summary - 730 entries
  167 local, 84 connected, 38 static, 6 RIP, 435 BGP 0 IS-IS, 0 OSPF
  Number of prefixes:
    /8: 1, /10: 1, /16: 1, /24: 47, /28: 49, /32: 207, /33: 2, /34: 2
    /35: 54, /36: 2, /40: 6, /42: 1, /44: 4, /48: 94, /64: 85, /96: 1
    /112: 1, /125: 1, /126: 4, /127: 1, /128: 166

/ot

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From: Brian E Carpenter <[email-masked]>
Date: Mon, 24 Mar 2003 02:37:51 +0100

Ole Troan wrote:
...
>     /96: 1
>     /112: 1, /125: 1, /126: 4, /127: 1

And what are these??

   Brian

---

From: Ole Troan <[email-masked]>
Date: Mon, 24 Mar 2003 13:53:16 +0000

> And what are these??

automatic tunnelling (::/96) and point to point links.

/ot

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From: "Robert J. Rockell" <[email-masked]>
Date: Mon, 24 Mar 2003 10:01:00 -0500 (EST)

Is this a broken filter, or needed de-aggregation? I would expect the
former.     Has there been any official move away from 2772 for production
space?

Thanks
Rob Rockell
SprintLink
(+1) 703-689-6322
-----------------------------------------------------------------------

On Sun, 23 Mar 2003, Kurt Erik Lindqvist wrote:

->
->
->As there was some discussions in Atlanta on wether longer prefixes is
->actually in use today. This is just the first page of sh ipv6 route on
->one of my home routers :
->
->IPv6 Routing Table - 438 entries
->Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
->        I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
->Timers: Uptime/Expires
->
->B   2001:200:126::/48 [20/6]
->      via FE80::C15E:FA3A, Tunnel10, 02:22:30/never
->B   2001:200:202::/48 [20/6]
->      via FE80::C15E:FA3A, Tunnel10, 02:22:56/never
->B   2001:200:203::/48 [20/6]
->      via FE80::C15E:FA3A, Tunnel10, 4d01h/never
->B   2001:200:200::/40 [20/5]
->      via 2001:670:87:3001::, Tunnel10, 4d01h/never
->B   2001:200:340::/48 [20/6]
->      via FE80::C15E:FA3A, Tunnel10, 4d01h/never
->B   2001:200:300::/40 [20/6]
->      via FE80::C15E:FA3A, Tunnel10, 4d01h/never
->B   2001:200:500::/40 [20/3]
->      via FE80::C15E:FA3A, Tunnel10, 5d17h/never
->B   2001:200::/35 [20/3]
->      via 2001:670:87:3001::, Tunnel10, 3d03h/never
->B   2001:208::/32 [20/5]
->      via 2001:670:87:3001::, Tunnel10, 3d03h/never
->B   2001:218::/32 [20/3]
->      via 2001:670:87:3001::, Tunnel10, 1d06h/never
->B   2001:220::/35 [20/4]
->      via FE80::82F4:B4, Tunnel30, 02:51:25/never
->B   2001:228:C00::/40 [20/5]
->      via 2001:670:87:3001::, Tunnel10, 4d01h/never
->
->
->It appears as if there are number of prefix lengths being in use.
->
->Best regards,
->
->- kurtis -
->
->

---

From: Kurt Erik Lindqvist <[email-masked]>
Date: Mon, 24 Mar 2003 22:10:42 +0100

> former.     Has there been any official move away from 2772 for 
No, but I expect that people are starting to make up the lack of 
official support for multihoming. Just as with RIR allocation boundary 
filtering in IPv4. But that is just me guessing.

- kurtis -

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From: Tim Chown <[email-masked]>
Date: Tue, 25 Mar 2003 00:31:47 +0000

So do you filter the /35's and above?