Adjusting Igmp Performance; Configuring Igmp Query And Response Parameters - HP FlexFabric 5950 series Configuration Manual

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Step
1.
Enter system view.
2.
Enter interface view.
3.
Configure a multicast group
policy.

Adjusting IGMP performance

Before adjusting IGMP performance, complete the following tasks:
Configure any unicast routing protocol so that all devices can interoperate at the network layer.
Configure basic IGMP features.

Configuring IGMP query and response parameters

The following are IGMP query and response parameters:
IGMP querier's robustness variable—Number of times for retransmitting IGMP queries in
case of packet loss. A higher robustness variable makes the IGMP querier more robust, but
increases the timeout time for multicast groups.
IGMP startup query interval—Interval at which an IGMP querier sends IGMP general queries
at startup.
IGMP startup query count—Number of IGMP general queries that an IGMP querier sends at
startup.
IGMP general query interval—Interval at which an IGMP querier sends IGMP general queries
to check for multicast group members on the network.
IGMP last member query interval—In IGMPv2, it sets the interval at which a querier sends
group-specific queries after receiving a leave message. In IGMPv3, it sets the interval at which
a querier sends group-and-source-specific queries after receiving a report that changes
multicast source and group mappings.
IGMP last member query count—In IGMPv2, it sets the number of group-specific queries that
a querier sends after receiving a leave message. In IGMPv3, it sets the number of
group-and-source-specific queries that a querier sends after receiving a report that changes
multicast source and group mappings.
IGMP maximum response time—Maximum time before a receiver responds with a report to
an IGMP general query. This per-group timer is initialized to a random value in the range of 0 to
the maximum response time specified in the IGMP query. When the timer value for a group
decreases to 0, the receiver sends an IGMP report to the group.
IGMP other querier present timer—Lifetime for an IGMP querier after a non-querier receives
an IGMP general query. If the non-querier does not receive a new query when this timer
expires, the non-querier considers that the querier has failed and starts a new querier election.
Configuration restrictions and guidelines
When you configure the IGMP query and response parameters, follow these restrictions and
guidelines:
You can configure the IGMP query and response parameters globally for all interfaces in IGMP
view or for an interface in interface view. For an interface, the interface-specific configuration
takes priority over the global configuration.
Command
system-view
interface interface-type
interface-number
igmp
group-policy ipv4-acl-number [ v
ersion-number ]
99
Remarks
N/A
N/A
By default, no IGMP multicast
group policy exists on an
interface. Hosts attached to the
interface can join any multicast
groups.

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