3Com 4210G Series, Configuration Manual, Page: 368 / 1133

2-18
Configuring multicast group replacement on a port or a group of ports
Follow these steps to configure multicast group replacement on a port or a group of ports:
To do... Use the command... Remarks
Enter system view
system-view
—
interface interface-type
interface-number
Enter Ethernet port/Layer 2
aggregate port view or port
group view
port-group manual
port-group-name
Required
Use either approach
Enable multicast group
replacement
igmp-snooping overflow-replace
[
vlan vlan-list
]
Required
Disabled by default
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 enabling multicast group
replacement. Otherwise, the multicast group replacement functionality will not take effect.
Displaying and Maintaining IGMP Snooping
To do... Use the command... Remarks
View IGMP Snooping multicast
group information
display igmp-snooping group
[
vlan
vlan-id
] [
slot slot-number
] [
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
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 the IGMP Snooping multicast group
information for static joins.