nanog mailing list archives

Re: Did your BGP crash today?


From: Mike Gatti <ekim.ittag () gmail com>
Date: Fri, 27 Aug 2010 16:07:36 -0400

where's the change management process in all of this. 
basically now we are going to starting changing things that can 
potentially have an adverse affect on users without letting anyone know
before hand .... Interesting concept.

On Aug 27, 2010, at 3:33 PM, Dave Israel wrote:


On 8/27/2010 3:22 PM, Jared Mauch wrote:
When you are processing something, it's sometimes hard to tell if something
just was mis-parsed (as I think the case is here with the "missing-2-bytes")
vs just getting garbage.  Perhaps there should be some way to "re-sync" when
you are having this problem, or a parallel "keepalive" path similar to
MACA/MCAS/MIDCAS/TCAS between the devices to talk when something bad is
happening.

I know it wasn't there originally, and isn't mandatory now, but there is
an MD5 hash that can be added to the packet.  If the TCP hash checks
out, then you know the packet wasn't garbled, and just contained
information you didn't grok.  That seems like enough evidence to be able
to shrug and toss the packet without dropping the session.

-Dave




=+=+=+=+=+=+=+=+=+=+=+=+=
Mike Gatti  
ekim.ittag () gmail com
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