H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches Chapter 2 IGMP Snooping Configuration
2-23
Caution:
Be sure to configure the maximum number of multicast groups allowed on a port (refer
to
Configuring Maximum Multicast Groups that Can Be Joined on a Port) before
configuring multicast group replacement. Otherwise, the multicast group replacement
functionality will not take effect.
2.7 Displaying and Maintaining IGMP Snooping
To do... Use the command... Remarks
View the information of IGMP
Snooping multicast groups
display igmp-snooping group
[ vlan vlan-id ] [ slot slot-id ]
[ verbose ]
Available in
any view
View the statistics information
of IGMP messages learned
by IGMP Snooping
display igmp-snooping statistics
Available in
any view
Clear IGMP Snooping
multicast group information
reset igmp-snooping group
{ group-address | all } [ vlan vlan-id ]
Available in
user view
Clear the statistics
information of all kinds of
IGMP messages learned by
IGMP Snooping
reset igmp-snooping statistics
Available in
user view
 Note:
z The reset igmp-snooping group command works only on an IGMP
Snooping–enabled VLAN, but not on a VLAN with IGMP enabled on its VLAN
interface.
z The reset igmp-snooping group command cannot clear IGMP Snooping
forwarding table entries for static joins.
2.8 IGMP Snooping Configuration Examples
2.8.1 Configuring Simulated Joining
I. Network requirements
z As shown in Figure 2-3, Router A connects to the multicast source through
Ethernet 1/0/2 and to Switch A through Ethernet 1/0/1. Router A is the IGMP
querier on the subnet.