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

CiscoNSP List cisconsp_list at hotmail.com
Sat Dec 20 17:47:06 EST 2014


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.


  		 	   		  


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