configure forwarding ipmc lookup-key

The configure forwarding ipmc lookup-key mac-vlan command is disallowed under the following conditions.

• If IPMC forwarding is enabled on at least on one VLAN
• If MVR is enabled either globally or on a VLAN

  Similarly, enabling the above two features are disallowed,when the ipmc lookup-key is mac-vlan. The following warning message is displayed when the mac-valn option is specified:

  

  Warning:  Usage of multicast IP addresses that could result in overlapping MAC addresses should be avoided. Example: Using 225.1.1.1, 226.1.1.1 and 225.129.1.1 should be avoided. Either one of the addresses could be used.  Using multicast with PVLAN should be avoided with this forwarding option.

• Mixed-mode: configure forwarding ipmc lookup-key mixed-mode
• The configure igmp snooping forwarding-mode [group-vlan | source-group-vlan] command was introduced to support (*, G, V) forwarding before the IPMC compression feature was introduced. Because we are introduced IPv6 multicast support in ExtremeXOS 15.2, this command is deprecated, and the new configure forwarding ipmc lookup-key command now covers both IPv4 and IPv6.

The following warning message appears when the mixed mode option is specified:

Warning: Usage of multicast IP addresses that could result in overlapping MAC addresses should be avoided for snooping (IGMP/MLD/PIM snooping) controlled traffic.

Example: Using 225.1.1.1, 226.1.1.1 and 225.129.1.1 should be avoided. Either one of the addresses could be used.