Re: IDR WG Last Call

[Susan Hares <[e-mail]>]

Enke:

I don't think this is a clarification, I think this is a change in the
specification.   The original idea was to allow:

Withdraw and announce to withdraw the SAFI: uni,multi in the MP_UNREACH_NLRI
filed and to announce it in the NLRI field.

Can you site a technical reason for this change or common practice
regarding this text?

Sue Hares



At 10:13 AM 1/10/2002 -0800, Enke Chen wrote:
>Hi, Yakov:
>How about we add the following clarification (similar to the one in the base
>BGP spec):
>
>    An UPDATE message should not include the same address prefix (of the same
>    <AFI, SAFI>) in more than one of the following fields: WITHDRAWN ROUTES
>    field, Network Reachability Information fields, MP_REACH_NLRI field, and
>    MP_UNREACH_NLRI field. However a BGP speaker MUST be able to process 
> UPDATE
>    messages in this form. A BGP speaker should treat an UPDATE message of 
> this
>    form as if that the address prefix were included only in the last field of
>    the message.
>
>Thanks. -- Enke
>
> > Message-Id: <[e-mail]>
> > To: [e-mail]
> > Subject: IDR WG Last Call
> > MIME-Version: 1.0
> > Content-Type: text/plain; charset="us-ascii"
> > Content-ID: <[e-mail]>
> > Date: Wed, 09 Jan 2002 17:31:49 -0800
> > From: Yakov Rekhter <[e-mail]>
> > Sender: [e-mail]
> > Precedence: bulk
> >
> > Folks,
> >
> > This is to begin the WG Last Call on advancing Multiprotocol
> > Extensions for BGP-4 to Draft Standard. The Last Call ends
> > Jan 23, 2002.
> >
> > Yakov.
> > ------- Forwarded Message
> >
> > Date:    Wed, 09 Jan 2002 16:06:30 -0500
> > From:    [e-mail]
> > To:      IETF-Announce: ;
> > cc:      [e-mail]
> > Subject: I-D ACTION:draft-ietf-idr-rfc2858bis-00.txt
> >
> > - --NextPart
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> > This draft is a work item of the Inter-Domain Routing Working Group of 
> the IETF
> > .
> >
> >       Title           : Multiprotocol Extensions for BGP-4
> >       Author(s)       : T. Bates et al.
> >       Filename        : draft-ietf-idr-rfc2858bis-00.txt
> >       Pages           : 10
> >       Date            : 08-Jan-02
> >
> > Currently BGP-4 [BGP-4] is capable of carrying routing information
> > only for IPv4 [IPv4]. This document defines extensions to BGP-4 to
> > enable it to carry routing information for multiple Network Layer
> > protocols (e.g., IPv6, IPX, etc...). The extensions are backward
> > compatible - a router that supports the extensions can interoperate
> > with a router that doesn't support the extensions.
> >
> > A URL for this Internet-Draft is:
> > http://www.ietf.org/internet-drafts/draft-ietf-idr-rfc2858bis-00.txt
> >
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