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1. Monitor and debug commands
2.IGMP Troubleshooting Help
16.6.4.1 Monitor and Debug Commands
16.6.4.1.1 show ip igmp groups
Command: show ip igmp groups [{<ifname | group_addr>}]
Function: Display IGMP group information.
Parameter: <ifname> is the interface name, i.e. display group information of the specified
interface; <group_addr> is the group address, i.e., view group information.
Default: Not displayed.
Command mode: Admin Mode
Example:
Switch#show ip igmp groups
IGMP Connect Group Membership (1 group(s) joined)
Group Address Interface Uptime Expires Last Reporter
239.255.255.250 Vlan123 02: 57: 30 00: 03: 36 123.1.1.2
Switch#
Displayed information Explanation
Group Address Multicast group IP address
Interface Interface of the multicast group
Uptime The up time of the multicast group
Expires Rest time before the multicast group
timeouts
Last Reporter The host last reported the multicast group
16.6.4.1.2 show ip igmp interface
Command: show ip igmp interface [<ifname>]
Function: Display IGMP related information on the interface
Parameter: <ifname> is the interface name, i.e. display IGMP information of the specified
interface.
Default: Not displayed.
Command mode: Admin Mode
Example: Display IGMP information of Ethernet interface vlan1.