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used.
Example:
Switch# debug ip igmp packet
igmp packet debug is on
Switch #02: 17: 38: 58: IGMP: Send membership query on dvmrp2 for 0.0.0.0
02: 17: 38: 58: IGMP: Received membership query on dvmrp2 from 192.168.1.11 for
0.0.0.0
02: 17: 39: 26: IGMP: Send membership query on vlan1 for 0.0.0.0
02: 17: 39: 26: IGMP: Received membership query on dvmrp2 from 192.168.1.11 for
0.0.0.0
16.6.4.2 IGMP Troubleshooting Help
In configuring and using IGMP protocol, the IGMP protocol may fail to run properly due to
reasons such as physical connection failure or wrong configurations. The user should
ensure the following:
Good condition of the physical connection.
All interface and link protocols are in the UP state (use “show interfaces status”
command).
Ensure at least one multicast protocol is enabled on the interface.
Multicast protocols use unicast routes to perform RPF check, for this reason, the
unicast route correctness must be ensured.
16.7 web Management
Click Multicast protocol configuration on the main page. Users can configure
multicast protocols:
Multicast common configuration
PIM-DM configuration
PIM-SM configuration
DVMRP configuration
IGMP configuration
Inspect and debug
16.7.1 Multicast common configuration
In Multicast common configuration mode, click Show ip mroute to show ip multicast