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The following GTAC knowledge article should fix your issues:https://gtacknowledge.extremenetworks.com/articles/How_To/Multicast-Entry-not-Added-Hardware-Table-F...BillAdmin edit: Fixed link
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
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-vlanother options are: group-vlan (what Bill gave you), source-group-vlan (default) and mixed-modemixed-mode may be interesting if you have a mix of L3 and L2.
The error appear again, Slot-1 MDF-U-st.1 # sh log sev war01/05/2016 14:14:07.07 Slot-1: IPv4 multicast entry not added. Hardware Group Table full.01/05/2016 08:17:16.70 Slot-1: Previous message repeated 3 additional times in the last 9511 second(s)maybe last resort will be to put only L2, will this impact current traffic? do I need a maintenance window?
Did the switch reboot and possibly without the configuration being saved? Assuming that is the case I would to refer to Stephane's post above and put it into L2 only, most likely based on your config as you have shared it most likely wont cause you any issue. That command would be: "configure forwarding ipmc lookup-key mac-vlan"
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