H3C Technologies H3C S7500E Series Switches - Manual (Page 68)

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[SwitchA] vlan 100
[SwitchA-vlan100] port gigabitethernet 2/0/1 to gigabitethernet 2/0/4
[SwitchA-vlan100] igmp-snooping enable
[SwitchA-vlan100] igmp-snooping proxying enable
[SwitchA-vlan100] quit
4) Verify the configuration
After the configuration is completed, Host A and Host B send IGMP join messages for group
224.1.1.1. Receiving the messages, Switch A sends a join message for the group out port
GigabitEthernet 2/0/1 (a router port) to Router A.
Use the display igmp-snooping group command and the display igmp group command to
display information about IGMP snooping multicast groups and IGMP multicast groups. For
example:
# Display information about IGMP snooping multicast groups on Switch A.
[SwitchA] display igmp-snooping group
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Port flags: D-Dynamic port, S-Static port, C-Copy port
Subvlan flags: R-Real VLAN, C-Copy VLAN
Vlan(id):100.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
GE2/0/1 (D)
IP group(s):the following ip group(s) match to one mac group.
IP group address:224.1.1.1
(0.0.0.0, 224.1.1.1):
Host port(s):total 2 port.
GE2/0/3 (D)
GE2/0/4 (D)
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 2 port.
GE2/0/3
GE2/0/4
# Display information about IGMP multicast groups on Router A.
[RouterA] display igmp group
Total 1 IGMP Group(s).
Interface group report information of VPN-Instance: public net
Gigabitethernet2/0/1(10.1.1.1):
Total 1 IGMP Group reported
Group Address Last Reporter Uptime Expires
224.1.1.1 0.0.0.0 00:00:06 00:02:04
When Host A leaves the multicast group, it sends an IGMP leave message to Switch A.
Receiving the message, Switch A removes port GigabitEthernet 2/0/3 from the member port list
of the forwarding entry for the group; however, it does not remove the group or forward the
leave message to Router A because Host B is still in the group. Use the display