Subject: Resend of filter alignment message

From: "John Strassner" <[email-masked]>
Date: Sat, 9 Dec 2000 18:05:51 -0800

It appears that this mail didn't get through, so I'm
resending.

>Hi Jean, I believe your issue is that if you want to build
a
>condition to filter traffic, the IETF IPsec model uses
>classes derived from FilterEntryBase whereas QPIM uses two
>different classes - gpsPolicySimpleCondition and
>gpsPolicyCompoundCondition.
>
>The reason for this is that the QPIM extends the definition
>of a condition into an ordered triplet (i.e., {variable,
>operator, value}). These semantics are not present in the
>current definition of FilterEntryBase or its subclasses.
>Furthermore, the QPIM further extends these semantics to
>define a set of classes to model a set of common variables,
>a corresponding set of classes to model the values that the
>variables can take, and relationships to:
>
>   1) constrain the values that a given variable can take
>   2) relate the variables and values to a condition
>   3) represent reusable variables and values
>
>Note that an implementation could in fact produce a
>FilterEntry from these classes.
>
>HTH and kind regards,
>John
>----- Original Message -----
>From: "Jean Christophe Martin (From Home)"
><[email-masked]>
>To: "Yoram Ramberg" <[email-masked]>; <[email-masked]>
>Cc: <[email-masked]>
>Sent: Wednesday, November 29, 2000 9:51 AM
>Subject: Re: new version of QPIM
>
>
> > Yoram , John
> >
> >> A new (-02) version of the QoS Policy Information
> >> Model draft has been sent to the IETF for posting.
> >
> > Here is the motivation of my first mail to the alias :
> >
> > The CIM Network sub-model defines the elements :
> > FilterList, FilterEntryBase and FilterEntry.
> > These Filters are describing the traffic in the
> > Forwarding Path.
> >
> > The IPSEC policy Model (IETF/DMTF) is using these
> > classes as the basis for the condition part of
> > the policy.
> >
> > However, your draft is redefining a condition object
> > that is not at all aligned with the IETF (IPSEC) or
> > the DMTF (QoS Device Sub-Model & IPSEC).
> >
> > Do you have any plans to change your draft so that,
> > at a minimum, one can reuse already existing Filters as
> > Conditions in the QoS Policy Model ?
> >
> > Thanks.
> >
> > JC.

regards,
John