error ipv4 multicast entry

[Kar_Del_Moral]

I open a GTAC case, I just put in this x440 stack (today first day of production) and I got the ipv4 multicast entry error any suggestions?

[Paul_Poyant]

A consolidated KB article is available at
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-prevent-IPv4-multicast-entry-not-ad....

[Stephane_Grosj1]

To add a bit to it: EXOS stores, by default, multicast entries in HW as (S,G,V) in L3 Table resources, even if operating in L2. Your issue was typical of the x440 L3 scale, which is limited. What Bill gave you was a way to better optimize the L3 Multicast resources. IF you don't need L3, but only L2, and IF you still encounter your issue in the future, you may want to try switching to L2 learning for multicast. Scale will be way higher.

configure forwarding ipmc lookup-key mac-vlan

other options are: group-vlan (what Bill gave you), source-group-vlan (default) and mixed-mode

mixed-mode may be interesting if you have a mix of L3 and L2.

[Kar_Del_Moral]

Thanks for the information

[Bill_Stritzinge]

Either of the last commands here will fix your issue:

If pre 15.4 - "configure igmp snooping forwarding-mode group-vlan" and if 15.4 or later "configure forwarding ipmc lookup-key group-vlan"

Bill

[Kar_Del_Moral]

Bill, so far, after applying the instruction, no log error since yesterday 12:04pm, thanks