3Com Switch 7750 Configuration Guide

458 CHAPTER 46: IGMP CONFIGURATION
c
CAUTION:
■ If the number of joined multicast groups on the interface exceeds the
user-defined limit, new groups are not allowed to join any more.
■ If the number of existing IGMP multicast groups has exceeded the configured
limit on the number of joined multicast groups on the interface, the system will
delete some existing multicast groups automatically until the number of
multicast groups on the interface is conforming to the conferred limit.
Configuring IGMP
Simulated Joining
Simulated joining in IGMP is implemented in the same way as in IGMP Snooping
except that IGMP establishes and maintains IGMP entries.
Enabling IGMP simulated joining in interface view
Configuring IGMP simulated joining in Ethernet port view
c
CAUTION:
■ Before configuring IGMP simulated joining, enable IGMP in interface view first.
Limit the range of multicast
groups that the interface
serves
igmp group-policy
acl-number vlan vlan-id
Optional
■ By default, the filter is not
configured, that is, any
multicast group is
permitted on the port.
■ The port must belong to
the IGMP-enabled VLAN
specified in the command.
Otherwise, the command
does not take effect.
Table 365 Configure IGMP multicast groups on the interface
Operation Command Description
Table 366 Enable IGMP simulated joining in interface view
To do... Use the command... Description
Enter system view system-view -
Enter VLAN interface view interface Vlan-interface
interface-number
-
Enable simulated joining igmp host-join
group-address port
interface-list
Optional
Disabled by default
Table 367 Configure IGMP simulated joining on a port
Operation Command Description
Enter system view system-view -
Enter Ethernet port view interface interface-type
interface-number
-
Configure IGMP simulated
joining
igmp host-join
group-address vlan vlan-id
Optional
Simulated joining is disabled
by default.