3Com 3500 - Manual (Page 277)

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 following routing protocols:
Distance-Vector Multicast Routing Protocol (DVMRP), Multicast Open
Shortest Path First (MOSPF), and Protocol Independent Multicast (PIM).
■
Router port entries age out after 100 seconds. Routing 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 multicast 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)