HSRP state changes without serial interface going down
We have sites which has primary and secondary CE routers connected to PE routers thru 2 different VRFs which is inturn connected to RR and then edge PE-> DC edge routers.
We get alerts stating HSRP state changed and all phone calls get disconnected. When we check logs, we are finding there is no log for serial interface flap but BGP neighborship has been down. The HSRP states changes then BGP neighborship goes down.
Please have input why this is happening and how HSRP state changes without serial interface going down. Below are the logs from the router.
Mar 5 13:48:48: %HSRP-6-STATECHANGE: GigabitEthernet0/0 Grp 10 state Active -> Speak Mar 5 13:48:48: %HSRP-6-STATECHANGE: GigabitEthernet0/1 Grp 11 state Active -> Speak Mar 5 13:48:51: %BGP-5-ADJCHANGE: neighbor X.X.X.X Down Interface flap Mar 5 13:49:31: %BGP-5-ADJCHANGE: neighbor X.X.X.X Up Mar 5 13:50:22: %HSRP-6-STATECHANGE: GigabitEthernet0/0 Grp 10 state Standby -> Active Mar 5 13:50:22: %HSRP-6-STATECHANGE: GigabitEthernet0/1 Grp 11 state Standby -> Active
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...