Configuring The Maximum Number Of Multicast Groups On A Port - 3Com 4500 Configuration Manual

To do...
Enter system view
Enter Ethernet port view
Configure a multicast group
filter
A port can belong to multiple VLANs, you can configure only one ACL rule per VLAN on a port.
If no ACL rule is configured, all the multicast groups will be filtered.
Since most devices broadcast unknown multicast packets by default, this function is often used
together with the function of dropping unknown multicast packets to prevent multicast streams from
being broadcast as unknown multicast packets to a port blocked by this function.
The configuration performed in system view takes effect on all ports of the switch if no VLAN is
specified; if one or more VLANs are specified, the configuration takes effect on all ports in the
specified VLAN(s).
The configuration performed in Ethernet port view takes effect on the port no matter which VLAN it
belongs to if no VLAN is specified; if one or more VLANs are specified, the configuration takes
effect on the port only if the port belongs to the specified VLAN(s).

Configuring the Maximum Number of Multicast Groups on a Port

By configuring the maximum number of multicast groups that can be joined on a port, you can limit the
number of multicast programs on-demand available to users, thus to regulate traffic on the port.
Follow these steps to configure the maximum number of multicast groups on a port:
To do...
Enter system view
Enter Ethernet port view
Limit the number of multicast
groups on a port
Use the command...
system-view
interface interface-type
interface-number
igmp-snooping group-policy
acl-number [ vlan vlan-list ]
Use the command...
system-view
interface interface-type
interface-number
igmp-snooping group-limit
limit [ vlan vlan-list
[ overflow-replace ] ]
1-9
Remarks
—
—
Optional
No group filter is configured by
default, namely hosts can join
any multicast group.
Remarks
—
—
Required
The maximum number of
multicast groups on a port is
256 by default.