R3102-R3103-HP 6600/HSR6600 Routers IP Multicast Configuration Guide

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# Enable IP multicast routing on Router B, IGMP proxying on GigabitEthernet 2/1/1, and IGMP
on GigabitEthernet 2/1/2.
<RouterB> system-view
[RouterB] multicast routing-enable
[RouterB] interface gigabitethernet 2/1/1
[RouterB-GigabitEthernet2/1/1] igmp proxying enable
[RouterB-GigabitEthernet2/1/1] quit
[RouterB] interface gigabitethernet 2/1/2
[RouterB-GigabitEthernet2/1/2] igmp enable
[RouterB-GigabitEthernet2/1/2] quit
3. Verify the configuration:
# Display the IGMP configuration and operation information on GigabitEthernet 2/1/1 of Router
B.
[RouterB] display igmp interface gigabitethernet 2/1/1 verbose
GigabitEthernet2/1/1(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 the IGMP group information on Router A.
[RouterA] display igmp group
Total 1 IGMP Group(s).
Interface group report information of VPN-Instance: public net
GigabitEthernet2/1/1(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 2/1/1 of Router B.
Troubleshooting IGMP
This section describes common IGMP problems and how to troubleshoot them.
No membership information exists 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 that
connects to the host.