[146852] in North American Network Operators' Group
RE: Odd router brokenness
daemon@ATHENA.MIT.EDU (Leigh Porter)
Wed Nov 23 12:00:16 2011
From: Leigh Porter <leigh.porter@ukbroadband.com>
To: Mark Radabaugh <mark@amplex.net>, NANOG list <nanog@nanog.org>
Date: Wed, 23 Nov 2011 17:00:39 +0000
In-Reply-To: <4ECD2312.3040005@amplex.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> -----Original Message-----
> From: Mark Radabaugh [mailto:mark@amplex.net]
> Sent: 23 November 2011 16:53
> To: NANOG list
> Subject: Re: Odd router brokenness
>=20
> On 11/23/11 11:33 AM, Saku Ytti wrote:
> > On (2011-11-23 09:41 -0500), Mark Radabaugh wrote:
> >
> >> The question is: How does a router break in this manner? It
> >> appears to unintentionally be doing something different with traffic
> >> based on the source address, not the destination address. I
> >> realize this can be done intentionally - but that is not the case
> >> here (unless somebody isn't telling me something).
> > I don't think we can determine that it has anything to do with source
> > address based on data shown.
> > 38.104.148.5 could very well be 6500 and somehow broken adjacency to
> > 74.125.226.6, perhaps hardware adjacency having MTU of 0B, causing
> punt
> > which is rate-limited by different policer than TTL exceeded policer.
> >
> I was told the router was reloaded to resolve a CEF issue. Not sure
> what was wrong with 'clear cef linecard'.
Now *that* brings back memories!
--
Leigh
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