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..
> From: [email protected] > To: [email protected] > Date: Sun, 21 Dec 2014 09:47:06 +1100 > Subject: [c-nsp] BGP (VPNv4) flapping every 3minutes > > Hi Guys, > I have 2 RR's that successfully peer with ~10 other clients(Plus an existing > full mesh) - the 11th (Cisco 7301) is establishing a session, then flaps(due > to timeout) every 3 minutes. > > From a "working" client, the only difference I can see is scan import time. > > i.e. > > Flapping every 3 minutes (Note, I tried removing/re-adding the .212 RR as a > "non template", but it made no difference - BGP to this router (.219), flaps > to the 2 x RR's (.212 + .213) every 3 minutes...all other BGP sessions are > stable on .219 > > address-family vpnv4 > bgp redistribute-internal > bgp scan-time 30 > neighbor MPLS-VPN-PEERS send-community extended > neighbor 123.123.123.212 activate > neighbor 123.123.123.213 activate > neighbor 123.123.123.213 send-community extended > neighbor 123.123.123.213 inherit peer-policy TO_RR > neighbor 123.123.123.217 activate > neighbor 123.123.123.218 activate > neighbor 123.123.123.222 activate > neighbor 123.123.123.238 activate > neighbor 123.123.123.246 activate > neighbor 123.123.123.247 activate > neighbor 123.123.123.248 activate > neighbor 123.123.123.249 activate > neighbor 123.123.123.250 activate > exit-address-family > > > ..And a Working vpnv4 (From .222) > > address-family vpnv4 > neighbor MPLS-VPN-PEERS send-community extended > neighbor 123.123.123.212 activate > neighbor 123.123.123.212 send-community extended > neighbor 123.123.123.212 inherit peer-policy TO_RR > neighbor 123.123.123.213 activate > neighbor 123.123.123.213 send-community extended > neighbor 123.123.123.213 inherit peer-policy TO_RR > neighbor 123.123.123.217 activate > neighbor 123.123.123.218 activate > neighbor 123.123.123.219 activate > neighbor 123.123.123.238 activate > neighbor 123.123.123.245 activate > neighbor 123.123.123.246 activate > neighbor 123.123.123.247 activate > neighbor 123.123.123.248 activate > neighbor 123.123.123.249 activate > neighbor 123.123.123.250 activate > bgp redistribute-internal > bgp scan-time import 10 > bgp scan-time 30 > exit-address-family > > Any suggestions are greatly appreciated. > > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
