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Configuring CGMP
Displaying Multicast Router Information
When you enable CGMP, the switch automatically learns to which ports a multicast router is connected.
To display dynamically learned multicast router information, perform one of these tasks in privileged
mode:
Task
Display information on dynamically learned and
manually configured multicast router ports.
Display information only on those multicast
router ports learned dynamically using CGMP.
This example shows how to display information on all multicast router ports (the asterisk [*] next to the
multicast router on port 3/1 indicates that the entry was configured manually):
Console> (enable) show multicast router
CGMP enabled
IGMP disabled
Port
---------
2/1
2/2
3/1
Total Number of Entries = 4
'*' - Configured
Console> (enable)
This example shows how to display only those multicast router ports that were learned dynamically
through CGMP:
Console> (enable) show multicast router cgmp
CGMP enabled
IGMP disabled
Port
---------
2/1
2/2
Total Number of Entries = 3
'*' - Configured
Console> (enable)
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
15-6
Vlan
----------------
99
255
*
1
Vlan
----------------
99
255
Chapter 15
Configuring Multicast Services
Command
show multicast router [mod_num/port_num]
[vlan_id]
show multicast router cgmp
[mod_num/port_num] [vlan_id]
78-12647-02
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Troubleshooting
