Enabling multicast group replacement
This feature enables the device to replace an existing group with a newly joined group when the number of groups exceeds the upper limit. This feature is typically used in the channel switching application. Without this feature, the device discards IGMP reports for new groups, and the user cannot change to the new channel.
Configuration restrictions and guidelines
When you enable multicast group replacement, follow these restrictions and guidelines:
This configuration takes effect only on the multicast groups that a port joins dynamically.
You can enable this feature globally for all ports in IGMP-snooping view or for a port in interface view. For a port, the port-specific configuration takes priority over the global configuration.
Enabling multicast group replacement globally
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter IGMP-snooping view. | igmp-snooping | N/A |
3. Enable multicast group replacement globally. | overflow-replace [ vlan vlan-list ] | By default, multicast group replacement is disabled globally. |
Enabling multicast group replacement on a port
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter Layer 2 Ethernet interface view or Layer 2 aggregate interface view. | interface interface-type interface-number | N/A |
3. Enable multicast group replacement on a port. | igmp-snooping overflow-replace [ vlan vlan-list ] | By default, multicast group replacement is disabled on a port. |