Configuring Igmp-Related Functions; Configuration Prerequisites; Enabling Igmp Snooping Querier - H3C S5500-SI Series Manual

Operation Manual – Multicast Protocol
H3C S5500-SI Series Ethernet Switches

1.5 Configuring IGMP-Related Functions

1.5.1 Configuration Prerequisites

Before configuring IGMP-related functions, complete the following task:
Enable IGMP Snooping in the VLAN
Before configuring IGMP-related functions, prepare the following data:
IGMP general query interval
IGMP last-member query interval
Maximum response time to IGMP general queries
Source address of IGMP general queries
Source address of IGMP group-specific queries
Whether to enable the function of dropping unknown multicast data

1.5.2 Enabling IGMP Snooping Querier

In an IP multicast network running IGMP, a Layer 3 multicast device acts as the IGMP
querier, responsible for sending IGMP queries.
In a network that does not comprise Layer 3 multicast devices, however, it is a problem
to implement an IGMP querier, because Layer 2 device do not support IGMP. To solve
this problem, you can enable the IGMP Snooping querier function on a Layer 2 device
so that it can work as an IGMP querier to create and maintain multicast forwarding
entries at the data link layer.
Follow these steps to enable IGMP Snooping querier:
Enter system view
Enter VLAN view
Enable IGMP Snooping
querier
Caution:
The IGMP Snooping querier does not take part in IGMP querier elections.
It is meaningless to configure an IGMP Snooping querier in a multicast network
running IGMP. Furthermore, it may affect IGMP querier elections because it sends
IGMP general queries that contain low source IP addresses.
To do...
system-view
vlan vlan-id
igmp-snooping querier
Chapter 1 IGMP Snooping Configuration
Use the command...
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Remarks
—
—
Required
Disabled by default