3Com 7750 Series Chapter 4 IGMP Configuration Commands

3Com Switch 7750 Series
Command Reference Guide – Multicast Chapter 4 IGMP Configuration Commands
4-1
Chapter 4 IGMP Configuration Commands
 Note:
When running IP multicast protocols, Ethernet switches also provide the functions of
switches. We use routers in this manual to stand for not only the common routers but
also the layer 3 Ethernet switches running IP multicast protocols.
4.1 IGMP Configuration Commands
4.1.1 display igmp group
Syntax
display igmp group [ group-address | interface interface-type interface-number ]
View
Any view
Parameter
group-address: Address of the multicast group.
interface-type interface-number: VLAN interface type and VLAN interface number of
the router which are used to specify a VLAN interface. .
Description
Use the display igmp group command to view the member information of the IGMP
multicast group.
You can specify to show the information of a group or the member information of the
multicast group on a VLAN interface. The displayed information contains the multicast
groups which are joined by the downstream hosts through IGMP or through command
line.
Related command: igmp host-join.
Example
# View the member information of multicast group in the system.
<3Com> display igmp group
LoopBack0 (20.20.20.20): Total 3 IGMP Groups reported: