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To speed up the response of hosts to IGMP queries and avoid simultaneous timer expirations causing
IGMP report traffic bursts, you must properly set the maximum response delay.
•
The maximum response delay for IGMP general queries is set by the
max-response-time
command.
•
The maximum response delay for IGMP group-specific queries equals the IGMP last-member query
interval.
Configuring the global parameters for IGMP queries and responses
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
delay for IGMP general
queries.
max-response-time
interval
10 seconds by default
4.
Set the IGMP last-member
query interval.
last-member-query-interval
interval
1 second by default
Configuring the parameters for IGMP 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 interval for sending
IGMP general queries.
igmp-snooping query-interval
interval
60 seconds by default
4.
Set the maximum response
delay for IGMP general
queries.
igmp-snooping max-response-time
interval
10 seconds by default
5.
Set the IGMP last-member
query interval.
igmp-snooping
last-member-query-interval
interval
1 second by default
Configuring the source IP addresses for IGMP queries
After the switch receives an IGMP query whose source IP address is 0.0.0.0 on a port, it does not enlist
that port as a dynamic router port. This might prevent multicast forwarding entries from being correctly
created at the data link layer and eventually cause multicast traffic forwarding to fail. To avoid this
problem, when a Layer 2 switch acts as the IGMP snooping querier, HP recommends you to configure a
non-all-zero IP address as the source IP address of IGMP queries.
IMPORTANT:
The source address of IGMP query messages might affect the IGMP querier election within the segment
To configure the source IP addresses for IGMP queries:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
