bridge multicast igmp rPorts 277
bridge multicast igmp
3500
9000
9400
3900
9300
rPorts
For CoreBuilder 9000: Applies to Layer 2 switching modules only.
Lists the ports in the selected VLAN that lead to IP multicast routers.
Valid Minimum Abbreviation
b mu i r
Important Considerations
The system determines which ports in a VLAN lead to multicast routers
by snooping on advertisements from the follow ing routing protocols:
Distance-Vector Multicast Routing Protocol (DVMRP), Multi cast Open
Shortest Path First (MOSPF), and Protocol Independent Multicast (PIM).
Router port entries age out after 100 seconds. Ro uting protocol
advertisements are usually sent every few seconds.
For the CoreBuilder 3500 system and CoreBuilder 9000 Layer 3
modules, IGMP commands exist under the ip mult icas t igmp
menu.
Options
Prompt Description Possible Values [Default]
VLAN ID ID number of the VLAN
for which you want to list
ports that lead to IP
multicast routers
A valid VLAN ID
(VID)
? (for a list of
selectable VIDs)
1 (Default VLAN)