Troubleshooting Igmpv3 Backwards Compatibility - Avaya 8800 Troubleshooting Manual

Multicast feature troubleshooting

Troubleshooting IGMPv3 backwards compatibility

If you configure the switch to operate in v2-v3 compatibility mode, the switch supports all
IGMPv2 and v3 messages. The switch parses the group address of the messages. If the group
address is out of SSM range and it is a v3 message, the switch drops the message; if it is a
v2 message, PIM-SM or IGMP snoop processes handle the message.
To troubleshoot issues with the IGMPv3 backwards compatibility feature, perform the following
procedure.
Procedure steps
1. Verify that the SSM static channel is configured for the v1/v2 joins received. To
2. Verify that the SSM group range is configured for the v1/v2 joins received. To display
3. If the v1/v2 joins are out of SSM range, verify that the RP set exists for groups
376 Troubleshooting
display the configured SSM static channels, enter the following CLI command:
show ip igmp ssm-channel
OR
Enter the following ACLI command:
show ip igmp ssm-map
the configured SSM group range, enter the following CLI command:
show ip igmp ssm-global
OR
Enter the following ACLI command:
show ip igmp ssm
specified in the v1/v2 joins to allow for the building of a PIM tree. To display the
configured RP sets, enter the following CLI command:
show ip pim rp-set
OR
Enter the following ACLI command:
show ip pim rp-hash
Comments? infodev@avaya.com
July 2013