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error ipv4 multicast entry

error ipv4 multicast entry

Kar_Del_Moral
New Contributor III
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?
28 REPLIES 28

Thanks for your quick response, I enter the second one, (ver 15.7.1.4) and I'll monitor to see how it responds

Thanks

davidj_cogliane
Contributor
This does work very well. I have not seen the error messages on any of our stacks after making the changes Bill suggests.

Bill_Stritzinge
Extreme Employee
Sorry... Here is the full article:

Procedure:

Option conserves usage of the hardware Layer 3 multicast forwarding table:

configure igmp snooping filters per-vlan

(to set it back to default set it to per-port)

After changing the IGMP snooping filters from per-port (default) to per-vlan you can disable IGMP snooping on VLAN's where IGMP snooping is not required:

disable igmp snooping vlan

Stores multicast entries in the format (* AnySourceIP, GroupIP, VlanId), which is also referred to as (*, G):

configure igmp snooping forwarding-mode group-vlan

(to set it back to default configure it to source-group-vlan)

Routes with longer network masks might not be necessary if they are a subset of other routes with shorter network masks using the same gateway(s). When IP route compression is enabled, these unnecessary routes are not provided to the Forwarding information Base (FIB).
enable iproute compression

Additional notes:

Beginning in EXOS 15.4, the command configure igmp snooping forwarding-mode group-vlan was replaced with configure forwarding ipmc lookup-key group-vlan.

Hope it helps!

Bill

Bill_Stritzinge
Extreme Employee
The following GTAC knowledge article should fix your issues:

https://gtacknowledge.extremenetworks.com/articles/How_To/Multicast-Entry-not-Added-Hardware-Table-F...

Bill

Admin edit: Fixed link

How does ... command change the amount of multicast entries? I didn't understand the command well!
GTM-P2G8KFN