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. And see here for current known issues.

OSPF Fluctuations every 32 Minutes in CSC Environment

Hello Experts,

We experience the OSPF Fluctiations every 32 Minutes i.e. configured between PE & 'CSC' Router.

Note: It's a CSC Setup.

Few points are:

----------------

1) Last Mile is Healthy

2) OSPF Configuration are Fine

3) No MTU Related issues.

Can someone help in identifying the exact cause for the same.

Best Regards,

Guru Prasad R

3 REPLIES
Hall of Fame Super Silver

Re: OSPF Fluctuations every 32 Minutes in CSC Environment

Hello Guru,

each OSPF LSA is refreshed by the original owner every 30 minutes on average, (LSA group pacing waits to collect a group of LSAs to refresh).

A new version of LSAs trigger a SPF recalculation and this might explain what you see.

Hope to help

Giuseppe

Re: OSPF Fluctuations every 32 Minutes in CSC Environment

Hello Giuseppe,

Thanks for the Reply.

I tried 'LSA Group Pacing' in CSC Router, but the problem was continue to be existing.

Any more help, would be really Appreciable.

Best Regards,

Guru Prasad R

Hall of Fame Super Silver

Re: OSPF Fluctuations every 32 Minutes in CSC Environment

Hello Guru,

I would suggest you to better define the problem:

what do you mean with OSPF fluctuations?

I may guess you can experience temporary loss of MPLS connectivity but it is a wild guess.

In this case you can try to play with LDP synchronization

see

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/fsldpsyn.html#wp1054554

on in the field of MPLS LDP graceful restart

http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_ldp_grace_rstrt_ps6350_TSD_Products_Configuration_Guide_Chapter.html

Hope to help

Giuseppe

284
Views
0
Helpful
3
Replies