Configuring Igmp Version; Configuring Options Related To Igmp Query Messages - H3C S5600 SERIES Operation Manual

Before performing the following configurations described in this chapter, you must enable multicast
routing and enable IGMP on the specific interfaces.

Configuring IGMP Version

Follow these steps to configure IGMP version:
To do...
Enter system view
Enter interface view
Configure the IGMP version
IGMP versions cannot be switched to one another automatically. Therefore, all the interfaces on a
subnet must be configured to use the same IGMP version.

Configuring Options Related to IGMP Query Messages

IGMP general query
An IGMP router sends IGMP general query messages to the local subnet periodically, and multicast
receiver hosts send IGMP reports in response to IGMP queries. Thus the router learns which multicast
groups on the subnet have active members.
IGMP group-specific query
On a multi-access network, the query router (querier for short) maintains group memberships. After the
related features are configured, the IGMP querier sends a configurable number of IGMP group-specific
queries at a configurable interval when it receives an IGMP leave message from the hosts.
Suppose a host in a multicast group decides to leave the multicast group. The related procedure is as
follows:
The host sends an IGMP leave message.
When the IGMP querier receives the message, it sends robust-value IGMP group-specific query
messages at the interval of lastmember-queryinterval.
If other hosts are interested in the group after receiving the IGMP group-specific query message
from the querier, they must send IGMP report messages within the maximum response time
specified in the query messages.
Use the command...
system-view
interface interface-type
interface-number
igmp version { 1 | 2 }
3-7
Remarks
—
—
Optional
The system default is IGMP
version 2.