Enabling The Multicast Group Replacement Function - HP MSR2003 Configuration Manual

Step
1. Enter system view.
2. Enter Layer 2 Ethernet interface
view.
3. Set the maximum number of
multicast groups on a port.

Enabling the multicast group replacement function

When the number of multicast groups on a Layer 2 device or a port exceeds the limit:
If the multicast group replacement is enabled, the Layer 2 device or the port replaces an existing
•
multicast group with a newly joined multicast group.
• If the multicast group replacement is disabled, the Layer 2 device or the port discards IGMP reports
that are used for joining a new multicast group.
In some specific applications, such as channel switching, a newly joined multicast group must
automatically replace an existing multicast group. In this case, the function of multicast group
replacement must also be enabled so a user can switch from the current multicast group to a new group.
When you enable the multicast group replacement function, follow these guidelines:
This configuration is effective on the multicast groups that a port dynamically joins. If you configure
•
the port as a static member port for a multicast group, this configuration is not effective on the
multicast group.
• You can enable the multicast group replacement function either for the current port in interface view
or globally for all ports in IGMP-snooping view. If the configurations are made in both interface
view and IGMP-snooping view, the configuration made in interface view takes priority.
To enable the multicast group replacement function globally:
Step
1. Enter system view.
2. Enter IGMP-snooping view.
3. Enable the multicast group
replacement function globally.
To enable the multicast group replacement function on a port:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet interface
view.
3. Enable
replacement function on a port.
Command
system-view
interface interface-type
interface-number
igmp-snooping group-limit limit
[ vlan vlan-list ]
Command
system-view
igmp-snooping
overflow-replace [ vlan vlan-list ]
Command
system-view
interface interface-type
interface-number
multicast group
igmp-snooping overflow-replace
[ vlan vlan-list ]
29
Remarks
N/A
N/A
The default setting is
4294967295.
Remarks
N/A
N/A
By default, the multicast group
replacement function is disabled.
Remarks
N/A
N/A
By default, the multicast group
replacement function is disabled.