R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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• The maximum response delay for IGMP group-specific queries equals the IGMP last-member query

interval.

CAUTION:

Make sure the interval for sending IGMP general queries is larger than the maximum response delay for

IGMP general queries. Otherwise, multicast group members might be deleted by mistake.

Configuring the global parameters for IGMP queries and responses

Ste

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

To configure the parameters for IGMP queries and responses in a VLAN:

Ste

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 source IP addresses for IGMP queries

After a router 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 router acts as the IGMP snooping querier, HP recommends that you configure a

non-all-zero IP address as the source IP address of IGMP queries.

Changing the source address of IGMP queries might affect the IGMP querier election within the subnet.

To configure source IP addresses for IGMP queries in a VLAN:

Ste

Command

Remarks

1. Enter system view.

system-view N/A