Troubleshooting Igmp; No Membership Information On The Receiver-Side Router - HP 6125G Configuration Manual

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# Display IGMP group information on Switch A.
[SwitchA] display igmp group
Total 1 IGMP Group(s).
Interface group report information
Vlan-interface100(192.168.1.1):
Total 1 IGMP Groups reported
Group Address
224.1.1.1
The output shows that IGMP reports from the hosts are forwarded to Switch A through the proxy interface,
VLAN-interface 100 on Switch B.

Troubleshooting IGMP

No membership information on the receiver-side router

Symptom
When a host sends a report for joining multicast group G, no membership information of the multicast
group G exists on the router closest to that host.
Analysis
The correctness of networking and interface connections and whether the protocol layer of the
•
interface is up directly affect the generation of group membership information.
Multicast routing must be enabled on the router, and IGMP must be enabled on the interface
•
connecting to the host.
If the IGMP version on the router interface is lower than that on the host, the router will not be able
•
to recognize the IGMP report from the host.
If the igmp group-policy command has been configured on the interface, the interface cannot
•
receive report messages that fail to pass filtering.
Solution
Use the display igmp interface command to verify that the networking, interface connection, and
1.
IP address configuration are correct. If no information is output, the interface is in an abnormal
state. The reason is that you have configured the shutdown command on the interface, the
interface is not properly connected, or the IP address configuration is not correct.
Check that . Use the display current-configuration command to verify that multicast routing is
2.
enabled. If not, carry out the multicast routing-enable command in system view to enable IP
multicast routing. In addition, check that IGMP is enabled on the corresponding interfaces.
Use the display igmp interface command to verify that the IGMP version on the interface is lower
3.
than that on the host.
Use the display current-configuration interface command to verify that no ACL rule has been
4.
configured to restrict the host from joining the multicast group G. If the host is restricted from
joining the multicast group G, the ACL rule must be modified to allow receiving the reports for the
multicast group G.
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192.168.1.2 00:02:04
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