40
3.
Configure Switch A
# Enable IGMP snooping globally.
<SwitchA> system-view
[SwitchA] igmp-snooping
[SwitchA-igmp-snooping] quit
# Create VLAN 100, assign ports GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4 to this VLAN,
and enable IGMP snooping and IGMP snooping proxying in the VLAN.
[SwitchA] vlan 100
[SwitchA-vlan100] port gigabitethernet 1/0/1 to gigabitethernet 1/0/4
[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 1/0/1—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 groups and IGMP multicast groups. For example:
# Display information about IGMP snooping 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.
GE1/0/1 (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.
GE1/0/3 (D)
GE1/0/4 (D)
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 2 port.
GE1/0/3
GE1/0/4
# Display information about IGMP multicast groups on Router A.
[RouterA] display igmp group
Total 1 IGMP Group(s).
Interface group report information
GigabitEthernet1/0/1(10.1.1.1):