configure forwarding ipmc compression

configure forwarding ipmc compression {group-table | off}


Enables or disables compression of entries in the IP multicast group table to facilitate improved IP multicast scaling.

Syntax Description

group-table Enables compression.
off Disables compression.



Usage Guidelines

Compression of IP multicast group table entries allows the switch to process more multicast traffic using the faster switch hardware instead of the relatively slower switch software. Compression requires additional processing. Disable this feature if you suspect a problem exposed by IP multicast compression.

When you enable or disable this feature, all IP multicast entries are flushed, and this can result in a temporary loss of multicast traffic while the IP multicast entries are relearned.

To display the compression feature configuration, enter the command:

show forwarding configuration


The following command disables compression:

configure forwarding ipmc compression off


This command was first available in ExtremeXOS 12.2.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.