Troubleshooting Igmp; No Member Information On The Receiver-Side Router - H3C S7500E Series Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches
Querier for IGMP: 10.110.2.1 (this router)
Total 1 IGMP Group reported

4.7 Troubleshooting IGMP

4.7.1 No Member Information on the Receiver-Side Router

I. Symptom
When a host sends a report for joining multicast group G, there is no member
information of the multicast group G on the router closest to that host.
II. Analysis
The correctness of networking and interface connections directly affects the
generation of group member information.
Multicast routing must be enabled on the router.
If the igmp group-policy command has been configured on the interface, the
interface cannot receive report messages that fail to pass filtering.
III. Solution
1) Check that the networking is correct and interface connections are correct.
2) Check that the interfaces and the host are on the same subnet. Use the display
current-configuration interface command to view the IP address of the
interface.
3) Check
current-configuration command to check whether the multicast routing-enable
command has been executed. 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.
4) Check that the interface is in normal state and the correct IP address has been
configured. Carry out the display igmp interface command to view the interface
information. If no interface information is output, this means the interface is
abnormal. Typically this is because the shutdown command has been executed
on the interface, or the interface connection is incorrect, or no correct IP address
has been configured on the interface.
5) Check that no ACL rule has been configured to restrict the host from joining the
multicast group G. Carry out the display current-configuration interface
command to check whether the igmp group-policy command has been executed.
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.
that multicast routing
4-17
Chapter 4 IGMP Configuration
is enabled. Carry out the
display