[c-nsp] BGP session resets if NLRI exchanged

[Paul Cosgrove]

Many thanks Harold! that does indeed look like the issue.  We are using 
32byte ASNs, but since the problem was occuring even after we filtered 
that advertisement we had begun looking elsewhere.

Paul.


Harold Ritter (hritter) wrote:
> Paul,
>
> You might be running into CSCsl72955. If so, you could try the
> workaround suggested by the following link or upgrade the code.
>
> http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method
> =fetchBugDetails&bugId=CSCsl72955 
>
> Regards
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Paul Cosgrove
> Sent: Wednesday, March 25, 2009 11:55 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] BGP session resets if NLRI exchanged
>
> We are attempting to establish a new BGP session between one of our
> CRS-1 routers, and a Redback SE800 router owned by another provider.  Am
> not familiar with Redbacks myself and we have not peered with any before
> (as far as we know anyway).  The BGP session only remains up if no NLRI
> is exchanged.  If the other provider sends any prefixes to us we reply
> with a "invalid length for attribute" notification; if we send any
> prefixes to them they reply with  "invalid or corrupt AS path". 
>
> The other provider uses VPNv4 within their network, though I understand
> that it is not configured on this peering.  I'm wondering whether these
> errors could result if their router expects a RD (and sends one) on the
> advertisements, perhaps due to a software bug or typo in the config. 
>
> Perhaps someone has seen this problem before?
>
> Paul.
>
>
>
>
>
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