Procedure For Troubleshooting Multicast Stub Routing - HP 7102dl - ProCurve Secure Router Configuration Manual

Procedure for Troubleshooting Multicast Stub Routing

1. Identify the multicast address and network in question.
2. Verify that the router believes a host group exists for that address on that
network. You do so by viewing IGMP group memberships:
ProCurve# show ip igmp groups
The resulting display lists groups by their multicast address. Check that
an entry exists for the multicast address. The entry should also include
the interface that connects to the network in question.
3. If the interface in question does not have the group membership, the
router will not forward the multicasts into the network. The lack of the
entry could stem from several sources:
• The Ethernet (or WAN) interface connecting to the network has not
been configured as a downstream interface, so it is not listening for
IGMP messages. Enter the following command to view the interfaces
configured as IGMP interfaces:
ProCurve# show ip igmp interface
Figure 12-7 illustrates an example of the output from this command.
ProCurve# show ip igmp interface
eth 0/1 is UP
Ip Address is 10.22.120.47, netmask is 255.255.255.0
IGMP is enabled on interface
Current IGMP version is 2
IGMP query interval is 60 seconds
IGMP querier timeout is 120 seconds
IGMP max query response time is 10 seconds
Last member query count is 2
Last member query response interval is 1000 ms
IGMP activity: 548 joins, 0 leaves
IGMP querying router is 0.0.0.0
IGMP helper address is disabled
Figure 12-7. Viewing IGMP Interfaces
Configuring Multicast Support for a Stub Network
Troubleshooting Multicast Stub Routing and IGMP
IGMP version
Interface is not running
IGMP proxy or is an
upstream interface
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