Configuration Prerequisites; Enabling The Igmp Snooping Querier; Configuring Parameters For Igmp General Queries And Responses - HP MSR1002-4 Configuration Manual
Flexnetwork msr series
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Also See for MSR1002-4:
- Installation manual (46 pages) ,
- Configuration manual (108 pages) ,
- Command reference manual (471 pages)
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Configuration prerequisites
Before you configure the IGMP snooping querier, complete the following tasks:
•
Enable IGMP snooping for the VLAN.
•
Determine the IGMP general query interval.
•
Determine the maximum response time for IGMP general queries.
Enabling the IGMP snooping querier
This feature enables the device to periodically send IGMP general queries to establish and maintain
multicast forwarding entries at the data link Layer. You can configure an IGMP snooping querier on a
network without Layer 3 multicast devices.
Configuration restrictions and guidelines
Do not enable the IGMP snooping querier on a multicast network that runs IGMP. An IGMP snooping
querier does not take part in IGMP querier elections. However, it might affect IGMP querier elections
if it sends IGMP general queries with a low source IP address.
Configuration procedure
To enable the IGMP snooping querier for a VLAN:
Step
1.
Enter system view.
2.
Enter VLAN view.
3.
Enable the IGMP snooping
querier.
Configuring parameters for IGMP general queries and
responses
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 for a VLAN based on the actual condition of the
network.
A receiver host starts a report delay timer for each multicast group that it has joined when it receives
an IGMP general query. This timer is set to a random value in the range of 0 to the maximum
response time advertised in the query. When the timer value decreases to 0, the host sends an IGMP
report to the corresponding 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 set 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.
Command
system-view
vlan vlan-id
igmp-snooping querier
23
Remarks
N/A
N/A
By default, the IGMP snooping
querier is disabled.
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