[c-nsp] BGP (VPNv4) flapping every 3minutes

Gert Doering gert at greenie.muc.de
Sun Dec 21 03:53:02 EST 2014


On Sun, Dec 21, 2014 at 10:28:30AM +1100, CiscoNSP List wrote:
> ok - Ive after a bit of searching, looks like it is caused by mtu...Ive added " transport path-mtu-discovery disable" to one of the RR's on .219, and it's been up for 7+min....looks like this was the issue..

This hints at a MTU problem in your network, and the proper fix is to
fix the MTU problem, not add config to the RR to work around it.

(It *could* be CoPP related as well - if the rate limits are too low, 
"large packets" can just cause a over-threshold-drop by a single packet.
Been there, got bitten by it :-) ).

USENET is *not* the non-clickable part of WWW!
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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