3Com 4210G Series Configuration Manual page 389

Total 1 multicast-vlan(s)
Multicast vlan 10
subvlan list:
no subvlan
port list:
GE1/0/2
# View the IGMP Snooping multicast group information 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):10.
Total 1 IP Group(s).
Total 1 IP Source(s).
Total 1 MAC Group(s).
Router port(s):total 1 port.
GE1/0/1
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 3 port.
GE1/0/2
GE1/0/3
GE1/0/4
MAC group(s):
MAC group address:0100-5e01-0101
Host port(s):total 3 port.
GE1/0/2
GE1/0/3
GE1/0/4
As shown above, IGMP Snooping is maintaining the router ports and member ports in VLAN 10.
GE1/0/3
(D)
(D)
(D)
(D)
3-12
GE1/0/4