Displaying Multicast Router Information; Displaying Multicast Group Information - Cisco WS-C2948G-GE-TX Configuration Manual

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:
•
•
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)

Displaying Multicast Group Information

To display information about multicast groups, perform one of these tasks:
Task
Display information about multicast groups.
Display only information about multicast groups
that are learned dynamically through CGMP.
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
15-6
Display information on dynamically learned and manually configured multicast router
ports—show multicast router [mod_num/port_num] [vlan_id]
Display information only on those multicast router ports that are learned dynamically using
CGMP—show multicast router cgmp [mod_num/port_num] [vlan_id]
Vlan
----------------
99
255
* 1
Vlan
----------------
99
255
Chapter 15 Configuring Multicast Services
Command
show multicast group [mac_addr] [vlan_id]
show multicast group cgmp [mac_addr]
[vlan_id]
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