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Re: [Idr] RFC-4893 handling malformed AS4_PATH attributes

Jeffrey Haas <jhaas@pfrc.org> Mon, 15 December 2008 20:23 UTC

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Date: Mon, 15 Dec 2008 15:22:54 -0500
From: Jeffrey Haas <jhaas@pfrc.org>
To: Enke Chen <enkechen@cisco.com>
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Cc: Inter-Domain Routing List <idr@ietf.org>, quaizar.vohra@gmail.com, Danny McPherson <danny@tcb.net>
Subject: Re: [Idr] RFC-4893 handling malformed AS4_PATH attributes
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On Mon, Dec 15, 2008 at 12:09:58PM -0800, Enke Chen wrote:
> Again, I do not see any reason why RFC 4893 should be different from RFC 
> 5056 w.r.t. the processing of unexpected confed segments.

Orthogonal to the "could we do something better about it" discussion:
In 5065, the pain is isolated to an adjacent peering edge.
In 4893, the pain originates far away.

The penalty for pedantically obeying the spec is higher.  We saw this
even for something as simple as the motivation for the 5065 rewrite.

-- Jeff
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