[c-nsp] Continous BGP session resets on SRD3

[Kostas Fotiadis]

Hi Gordon,

Just hang-up the phone with TAC.
We also had the same issue this morning.
One session was iBGP and the other eBGP.
Engineer said, undocumented bug, needs to do more research and get back 
to be.
Don't know what he did and fix it. I guess you need to open a case...

Good luck,
Kostas


On 16/6/2010 12:37 μμ, Gordon Bezzina wrote:
> Hi,
>
> Since this morning I am experiencing a weird problem on one of my full feeds
> link.
> My router is a 7606 with dual RSP720-3CXL-GE and running SRD3.
>
> I have a multihop bgp peer to get the full bgp feed from my customer.
>
> Suddenly this morning the connection started flapping. With the following
> error message:
>
> Jun 16 07:40:03 CEST: %BGP-5-ADJCHANGE: neighbor W.X.Y.Z vpn vrf XX Up
> Jun 16 07:42:36 CEST: %BGP-5-ADJCHANGE: neighbor W.X.Y.Z vpn vrf XX Down BGP
> Notification sent
> Jun 16 07:42:36 CEST: %BGP-3-NOTIFICATION: sent to neighbor W.X.Y.Z 3/4
> (invalid flags for attribute) 3 bytes 000000
> 15w6d: BGP: 217.15.96.9 Bad attributes
> Jun 16 07:42:36 CEST: %BGP-4-MSGDUMP: unsupported or mal-formatted message
> received from W.X.Y.Z:
> FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 012B 0200 0001 1040 0101 02C0 119A
> 0226
> 0000 3D77 0000 22E0 0000 04F9 0000 3065 0003 0065 0003 0065 0000 C288 0000
> 22E4
> 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000
> 22E4
> 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000
> 22E4
> 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000
> 22E4
> 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 0000 22E4 4002 4E02 263D
> 7722
> E004 F930 655B A05B A0C2 8822 E422 E422 E422 E422 E422 E422 E422 E422 E422
> E422
>
> Jun 16 07:42:42 CEST: %BGP_SESSION-5-ADJCHANGE: neighbor W.X.Y.Z IPv4
> Unicast vpn vrf XX topology base removed from session  BGP Notification sent
>
> The sequence is as follows:
> It basically goes up, starts getting the feed, then at around 290K routes it
> logs this error and resets the session. It will
> Then start over again.
>
> Note that this does not seem to be the route dampening issue - I do not even
> have dampening enabled on my router.
>
> Also mls cef is set at 350K for IPv4 and free RAM is over 1G
>
> Any ideas?
>
> Thanks/Regards
> Gordon
>
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