Re: [Idr] I-D Action: draft-ietf-idr-optional-transitive-04.txt

Hi, folks:

The draft has been revised extensively as a result of consolidation with 
draft-chen-ebgp-error-handling-01.txt.

Here is a summary of the main changes:

   o Use "treat-as-withdraw" / "attribute discard" (instead of session 
reset)
     whenever possible in order to minimize the impact on routing.

   o Cover the well-known attributes as well as optional attributes

   o Specify that errors with the Attribute Flags should be fixed locally

   o Remove the "Neighbor-Complete flag", and also the check for Partial 
flag

     They are no longer needed given our goal of minimizing impact on 
routing.

   o Add the following in Operational Considerations:

     When a malformed attribute is indeed detected over an IBGP session, we
     recommend that routes with the malformed attribute be identified and
     traced back to the ingress router in the network where the routes
     were sourced or received externally, and then a filter be applied on
     the ingress router to prevent the routes from being sourced or 
received.

Thanks.  -- Enke

On 10/25/11 11:12 AM, internet-drafts@ietf.org wrote:
> 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           : Revised Error Handling for BGP UPDATE Messages
> 	Author(s)       : John G. Scudder
>                            Enke Chen
>                            Pradosh Mohapatra
>                            Keyur Patel
> 	Filename        : draft-ietf-idr-optional-transitive-04.txt
> 	Pages           : 10
> 	Date            : 2011-10-25
>
>     According to the base BGP specification, a BGP speaker that receives
>     an UPDATE message containing a malformed attribute is required to
>     reset the session over which the offending attribute was received.
>     This behavior is undesirable as a session reset would impact not only
>     routes with the offending attribute, but also other valid routes
>     exchanged over the session.  This document partially revises the
>     error handling for UPDATE messages, and provides guidelines for the
>     authors of documents defining new optional attributes.  Finally, it
>     revises the error handling procedures for several existing
>     attributes.
>
>
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ietf-idr-optional-transitive-04.txt
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> This Internet-Draft can be retrieved at:
> ftp://ftp.ietf.org/internet-drafts/draft-ietf-idr-optional-transitive-04.txt
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