Configuring parameters for IGMP general queries and responses
![[CAUTION: ]](images/caution.png) | CAUTION: To avoid mistakenly deleting multicast group members, make sure the IGMP general query interval is greater than the maximum response time for IGMP general queries. | |
You can modify the IGMP general query interval based on the actual network condition.
A receiver host starts a timer for each multicast group that it has joined when it receives an IGMP general query. This timer is initialized to a random value in the range of 0 to the maximum response time advertised in the query. When the timer decreases to 0, the host sends an IGMP report to the multicast group.
Set an appropriate value for the maximum response time for IGMP general queries to speed up hosts' responses to IGMP general queries and avoid IGMP report traffic bursts.
You can configure the maximum response time for IGMP general queries globally for all VLANs in IGMP-snooping view or for a VLAN in VLAN view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.
Setting the maximum response time for IGMP general queries globally
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter IGMP-snooping view. | igmp-snooping | N/A |
3. Set the maximum response time for IGMP general queries. | max-response-time interval | The default setting is 10 seconds. |
Configuring parameters for IGMP general queries and responses in a VLAN
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter VLAN view. | vlan vlan-id | N/A |
3. Set the IGMP general query interval in the VLAN. | igmp-snooping query-interval interval | The default setting is 125 seconds. |
4. Set the maximum response time for IGMP general queries in the VLAN. | igmp-snooping max-response-time interval | The default setting is 10 seconds. |