Configuring A Multicast Group Filter; Configuring The Maximum Number Of Multicast Groups On An Interface - 3Com S7906E Configuration Manual

Before you can configure an interface of a PIM-SM device as a static member of a multicast group
or a multicast source and group, if the interface is PIM-SM enabled, it must be a PIM-SM DR; if this
interface is IGMP enabled but not PIM-SM enabled, it must be an IGMP querier. For more
information about PIM-SM and a DR, refer to PIM Configuration in the IP Multicast Volume.
As a static member of a multicast group or a multicast source and group, the interface does not
respond to the queries from the IGMP querier, nor does it send an unsolicited IGMP membership
report or an IGMP leave group message when it joins or leaves a multicast group or a multicast
source and group. In other words, the interface will not become a real member of the multicast
group or the multicast source and group.

Configuring a Multicast Group Filter

To restrict the hosts on the network attached to an interface from joining certain multicast groups, you
can set an ACL rule on the interface as a packet filter so that the interface maintains only the multicast
groups matching the criteria.
Follow these steps to configure a multicast group filter:
To do...
Enter system view
Enter interface view
Configure a multicast group
filter

Configuring the Maximum Number of Multicast Groups on an Interface

You can configure the allowed maximum number of multicast groups on an interface to flexibly control
the number of multicast groups the interface can join.
Follow these steps to configure the maximum number of multicast groups an interface can join:
To do...
Enter system view
Enter interface view
Configure the maximum
number of multicast groups that
can be joined on the current
interface
Use the command...
system-view
interface interface-type
interface-number
igmp group-policy
acl-number [ version-number ]
Use the command...
system-view
interface interface-type
interface-number
igmp group-limit limit
1-11
Remarks
—
—
Required
By default, no multicast group
filter is configured on this
interface, namely hosts on the
current interface can join any
valid multicast group
Remarks
—
—
Required
1024 by default