F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100
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c. Verifying the configuration
# Display IGMP information on GigabitEthernet 0/1 of the firewall.
[Firewall] display igmp interface gigabitethernet 0/1 verbose
GigabitEthernet0/1(192.168.1.2):
IGMP proxy is enabled
Current IGMP version is 2
Multicast routing on this interface: enabled
Require-router-alert: disabled
Version1-querier-present-timer-expiry: 00:00:20
# Display IGMP group information on Router A.
[RouterA] display igmp group
Total 1 IGMP Group(s).
Interface group report information of VPN-Instance: public net
Ethernet1/1(192.168.1.1):
Total 1 IGMP Groups reported
Group Address Last Reporter Uptime Expires
224.1.1.1 192.168.1.2 00:02:04 00:01:15
The output shows that IGMP reports from the hosts are forwarded to Router A through the proxy
interface, GigabitEthernet 0/1 of the firewall.
199B
Troubleshooting IGMP
This section describes common IGMP problems and how to troubleshoot them.
758BNo membership information exists on the receiver-side router
1603BSymptom
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.
1604BAnalysis
• 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 that
connects 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 you have configured the igmp group-policy command on the interface, the interface cannot
receive report messages that fail to pass filtering.
1605BSolution
1. Use the display igmp interface command to verify that the networking, interface connection, and
IP address configuration are correct. If no information is output, the interface is in an abnormal
state. The reason might be that you have configured the shutdown command on the interface, that
the interface is not properly connected, or that the IP address configuration is not correctly
completed.