[c-nsp] 7606 to 6509 [BGP hold time issue]

[Shanawaz Batcha]

Now that you are confident you have tried a lower MTU setting
satisfactorily, just revisiting a couple of points mentioned by others (at
the cost of sounding repetitive but always good to check)

1. Is BGP MSS or PMTUD explicitly set on either side? have you tried
disabling them
2. Is BGP max prefix set on the other side ?



On Tue, May 8, 2012 at 7:59 PM, Scantlebury, Kieron <
Kieron.Scantlebury at level3.com> wrote:

>
> MTU's been checked and confirmed on numerous occasions with the customer.
> Their control plane has no policing.
>
> FYI. He has numerous other connections to the same device all receiving a
> full routing table and they all work fine. Its just our connection that's
> having the issue.
>
> Its driving me round the bend :)
>
> Cheers
> Kieron
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:
> cisco-nsp-bounces at puck.nether.net] On Behalf Of Shanawaz Batcha
> Sent: 04 May 2012 23:14
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] 7606 to 6509 [BGP hold time issue]
>
> During the 3 minutes of the session holding up, do you see any packets in
> the OutQ (show ip bgp summ)
>
> Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down
> State/PfxRcd
> 172.16.2.1     4       64900 1754971 1714093  1406547    0    0
> 7w2d            8
>
> As has been fairly pointed out, it looks like your 'fat' update packets
> are likely dropped by either an MTU mismatch or a CoPP filter on the other
> side. Its hard to know either way without further debugging (debug ip bgp
> update) run during your off-hours
>
> Shaan
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>



-- 
“Twenty years from now you will be more disappointed by the things that you
didn't do than by the ones you did do. So throw off the bowlines. Sail away
from the safe harbor. Catch the trade winds in your sails. Explore. Dream.
Discover.”