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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 51 Configuring Multicast Services
Understanding How RGMP Works
Clearing Multicast Router Ports
To clear the manually configured multicast router ports, perform one of these tasks in privileged mode:
This example shows how to clear a manually configured multicast router port:
Console> (enable) clear multicast router 2/12
Port 2/12 cleared from multicast router port list.
Console> (enable)
Clearing Multicast Group Entries
To clear the manually configured multicast group entries from the CAM table, perform this task in
privileged mode:
This example shows how to clear a multicast group entry from the CAM table:
Console> (enable) clear cam 01-11-22-33-44-55 1
CAM entry cleared.
Console> (enable)
Understanding How RGMP Works
RGMP constrains the multicast traffic that exits the switch through the ports to which only the
disinterested multicast routers are connected. Catalyst 6500 series switches support RGMP, which
enables a switch to reduce network congestion by forwarding the multicast data traffic to only those
routers that are configured to receive it.
Note To use RGMP, you must enable IGMP snooping on the switch. IGMP snooping constrains the multicast
traffic that exits through the switch ports to which the hosts are connected. IGMP snooping does not
constrain the traffic that exits through the ports to which one or more multicast routers are connected.
Note You must enable PIM on all routers and switches for RGMP to work. Currently, only PIM sparse mode
is supported.
Task Command
Clear the specific, manually configured multicast
router ports.
clear multicast router mod/port
Clear all manually configured multicast router
ports.
clear multicast router all
Task Command
Clear a multicast group entry from the CAM
table.
clear cam mac_addr [vlan]
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