Configuring source IP addresses for IGMP messages
The IGMP snooping querier might send IGMP general queries with the source IP address 0.0.0.0. The port that receives such queries will not be maintained as a dynamic router port. This might prevent the associated dynamic IGMP snooping forwarding entry from being correctly created at the data link layer and eventually cause multicast traffic forwarding failures.
To avoid this problem, you can configure a non-all-zero IP address as the source IP address of the IGMP queries on the IGMP snooping querier. This configuration might affect the IGMP querier election within the subnet.
You can also change the source IP address of IGMP reports or leave messages sent by a simulated member host or an IGMP snooping proxy.
Configuring the source IP address for IGMP messages in a VLAN
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter VLAN view. | vlan vlan-id | N/A |
3. Configure the source IP address for IGMP general queries. | igmp-snooping general-query source-ip ip-address | By default, the source IP address of IGMP general queries is the IP address of the current VLAN interface. If the current VLAN interface does not have an IP address, the source IP address is 0.0.0.0. |
4. Configure the source IP address for IGMP group-specific queries. | igmp-snooping special-query source-ip ip-address | By default, the source IP address of IGMP group-specific queries is one of the following:
|
5. Configure the source IP address for IGMP reports. | igmp-snooping report source-ip ip-address | By default, the source IP address of IGMP reports is the IP address of the current VLAN interface. If the current VLAN interface does not have an IP address, the source IP address is 0.0.0.0. |
6. Configure the source IP address for IGMP leave messages. | igmp-snooping leave source-ip ip-address | By default, the source IP address of IGMP leave messages is the IP address of the current VLAN interface. If the current VLAN interface does not have an IP address, the source IP address is 0.0.0.0. |
Configuring the source IP address for IGMP messages in a VSI
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter VSI view. | vsi vsi-name | N/A |
3. Configure the source IP address for IGMP general queries. | igmp-snooping general-query source-ip ip-address | By default, the source IP address of IGMP general queries is the IP address of the gateway interface for a VSI. If the gateway interface does not have an IP address, the source IP address is 0.0.0.0. |
4. Configure the source IP address for IGMP group-specific queries. | igmp-snooping special-query source-ip ip-address | By default, the source IP address of IGMP group-specific queries is one of the following:
|
5. Configure the source IP address for IGMP reports. | igmp-snooping report source-ip ip-address | By default, the source IP address of IGMP reports is the IP address of the gateway interface for a VSI. If the gateway interface does not have an IP address, the source IP address is 0.0.0.0. |
6. Configure the source IP address for IGMP leave messages. | igmp-snooping leave source-ip ip-address | By default, the source IP address of IGMP leave messages is the IP address of the gateway interface for a VSI. If the gateway interface does not have an IP address, the source IP address is 0.0.0.0. |