[146848] in North American Network Operators' Group
Re: Odd router brokenness
daemon@ATHENA.MIT.EDU (Mark Radabaugh)
Wed Nov 23 11:51:52 2011
Date: Wed, 23 Nov 2011 11:45:06 -0500
From: Mark Radabaugh <mark@amplex.net>
To: NANOG list <nanog@nanog.org>
In-Reply-To: <20111123163323.GA19075@pob.ytti.fi>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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'.
--
Mark Radabaugh
Amplex
mark@amplex.net 419.837.5015
