3Com 7757 Configuration Manual page 434

434 C 43: IGMP S
HAPTER
n
Configuring to Limit
Number of Multicast
Groups on a Port
Configuring IGMP
Snooping Querier
C
NOOPING ONFIGURATION
Table 342 Configure IGMP Snooping filtering ACLs globally
Operation
Enable IGMP
Snooping filter in
system view
Configuring IGMP Snooping filtering ACLs for a port
Table 343 Configure IGMP Snooping filtering ACLs for a port
Operation
Enter system view
Enter Ethernet port
view
Configure the
multicast filtering
feature for the port
One port can belong to multiple VLANs. Only one ACL rule can be configured
■
on each of the VLANs to which the port belongs.
If the port does not belong to the VLAN where the command is configured, the
■
configured ACL rule does not take effect.
If no ACL rule is configured in the command, the multicast packets of all the
■
multicast groups are rejected.
With a limit imposed on the number of multicast groups on the switch port, users
can no longer have as many multicast groups as they want when demanding
multicast group programs. Thereby, the bandwidth on the port is controlled.
Table 344 Configure to limit number of multicast groups on a port
Operation
Enter system view
Enter Ethernet port view
Configure the number of
multicast groups on a port
In an IP multicast network running IGMP, a multicast router is responsible for
sending IGMP general queries, so that all Layer 3 multicast devices can establish
and maintain multicast forwarding entries, thus to forward multicast traffic
correctly at the network layer. This router or Layer 3 switch is called IGMP querier.
Command
igmp-snooping
group-policy acl-number
[ vlan vlan-list ]
Command
system-view
interface interface-type
interface-number
igmp-snooping
group-policy acl-number
[ vlan vlan-list ]
Command
system-view
interface interface-type
interface-number
igmp-snooping group-limit
limit [ vlan vlan-list
[ overflow-replace ] |
overflow-replace ]
Description
Required
You can configure the ACL to filter the IP
■
addresses of corresponding multicast
group.
By default, the multicast filtering feature
■
is disabled.
Description
-
-
Required
You can configure the ACL to filter the IP
■
addresses of corresponding multicast
group.
By default, the multicast filtering feature
■
is disabled.
Description
-
-
Optional
The number of multicast
groups on a port is 256