Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

HSRP state changes without serial interface going down

Brief Summary

===========

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.

Problem:

=======

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

  • WAN Routing and Switching
5 REPLIES
Cisco Employee

Re: HSRP state changes without serial interface going down

Hi,

Packet drop or something cause the peer did not receive the hellos also can make HSRP and BGP neighbor flap.

CPU too busy might be another reason cause peer cannot process the hello packets, and drop the HSRP/BGP neighbor.

HTH,

Lei Tian

New Member

Re: HSRP state changes without serial interface going down

Thanks for the reply. I checked the CPU utilization and its normal. Currently link is stable so cant say if it was high when HSRP state changed.

Re: HSRP state changes without serial interface going down

Look at the logs of all the routers running HSRP. Are any of the interfaces bouncing?

New Member

Re: HSRP state changes without serial interface going down

There are no interfaces flapped on the router still we are getting HSRP state changes on the router.

Re: HSRP state changes without serial interface going down

Source a ping (100 pings) from an HSRP enabled interface to 224.0.0.2

Look for drops.

622
Views
0
Helpful
5
Replies
This widget could not be displayed.