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

PIM-SM neighbor go down and not coming up

Hi,

I have 2 ASR routers running PIM-SM between them on several sub interfaces.

PIM hello interval configured for 200ms.

Sometimes PIM neighbors between ASR routers going down.

Reboot for each router not resolving the problem.

Deleting  ip pim sparse-mode and configuring it again on one of the ASR routers resolves the problem.

I didn't find any related bug.

The version is asr1000rp1-adventerprisek9.03.06.01.S.152-2.S1.bin

Anyone has an idea ?

Everyone's tags (1)
6 REPLIES
VIP Purple

PIM-SM neighbor go down and not coming up

Hello Alex,

I don't know how much multicast traffic is sent across your network, but by default, the mroutes expire after 180 seconds. You might want to use the 'ip pim-sparse sg expiry-timer' command to increase that value.

Obviously, since I have not seen the configuration of your routers, this is just a wild guess. Can you post the configs ?

Regards,

Georg

PIM-SM neighbor go down and not coming up

Hello Alex

I had similar issues with PIM in combination with BFD. Do you use BFD?

Regards

Marcel

New Member

PIM-SM neighbor go down and not coming up

Hi Marcel,

Yes I'm using BFD.

How did you resolve it ? Or just removed BFD ?

BR,

PIM-SM neighbor go down and not coming up

I had to adjust the BFD timers - if they are to aggressiv PIM flaps. And  also have a look at the BFD configuration for subinterfaces, there is a  command like "bfd optimize subinterface" which is also a good thing to enable (check out the config guide for detail explanation)

HTH

New Member

PIM-SM neighbor go down and not coming up

But in my case the PIM not flaps.

It goes down and not coming up until I disable and enable it.

PIM-SM neighbor go down and not coming up

Yes, but it's something like flapping ;-)

I would suggest the following action plan: Disable BFD on one of your PIM-links. If your PIM-neighborship remains up, there is somenting wrong with BFD. If it goes still down, the issue is something else.

1124
Views
0
Helpful
6
Replies