The SSM channel table consists of entries that map groups to their sending source. SSM channels cannot conflict with static source groups and vice versa. After you configure an SSM channel or a static source group, the switch performs a consistency check to make sure no conflicts exist. You cannot map one group (G) to different sources for both a static source group and an SSM channel.
The consistency check applies to all SSM channel entries, even if they are disabled. If you disable an entry, it becomes inactive; the switch does not delete the entry and you can later reenable it.
After you disable an SSM channel, the Nortel Ethernet Routing Switch 5000 Series stops multicast traffic from the specified source to the specified group. You can use this static setting as a security feature to block traffic from a certain source to a specific group.