cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

IGMP Stopped after Firmware Upgrade

Highlighted
New here

IGMP Stopped after Firmware Upgrade

I have several boxes that lost multicast after an upgrade from MS 9.32 to 9.37.  They've coasted through upgrades before, but this time it did not work.  IGMP snooping is enabled.

 

On the boxes receiving multicast, netstat -g shows subscription to all of the groups, but I'm not seeing the IGMP join traffic until I forced the software to restart.  (The software itself leaves the IGMP management up to the OS, and it's an older Linux kernel - 3.10)

 

Has anyone else observed this?

2 REPLIES 2
Highlighted
Kind of a big deal

Re: IGMP Stopped after Firmware Upgrade

Are your captures along the path showing the IGMP packets being dropped anywhere?

Adam R MS | CISSP, CISM, VCP, MCITP, CCNP, ITILv3, CMNO
If this was helpful click the Kudo button below
If my reply solved your issue, please mark it as a solution.
Highlighted
Kind of a big deal

Re: IGMP Stopped after Firmware Upgrade

Try turning IGMP snooping off and then back on again - to give it a reset on the switch.

Welcome to the Meraki Community!
To start contributing, simply sign in with your Cisco account. If you don't yet have a Cisco account, you can sign up.