Really, you'd want to expose the pseudoheader check at endhosts; a
well-instrumented Linux box could tell you a lot
about checksum failures.
But in this case, a router would be decapping UDP/MPLS tunnels as an endpoint,
so could report on checksum failures -
if the checksum wasn't zero.
Lloyd Wood
http://about.me/lloydwood
________________________________________
From: Dino Farinacci [farinacci(_at_)gmail(_dot_)com]
Sent: 12 January 2014 21:37
To: Wood L Dr (Electronic Eng)
Cc: <mark(_dot_)tinka(_at_)seacom(_dot_)mu>; <mpls(_at_)ietf(_dot_)org>;
gorry(_at_)erg(_dot_)abdn(_dot_)ac(_dot_)uk; lisp(_at_)ietf(_dot_)org;
david(_dot_)black(_at_)emc(_dot_)com; randy(_at_)psg(_dot_)com;
tsvwg(_at_)ietf(_dot_)org; jnc(_at_)mit(_dot_)edu; ietf(_at_)ietf(_dot_)org
Subject: Re: [lisp] [mpls] draft-ietf-mpls-in-udp was RE: gre-in-udp draft
(was: RE: [tsvwg] Milestones changed for tsvwg WG)
Do any routers count TCP/UDP checksum failures, much less
expose the count via SNMP?
Typically they do but only for packets destined to them. Much like hosts would
check the header checksum.
Dino