UMN:CLI
User Manual
V8102
492
10.2.3
IGMPv2 Snooping
10.2.3.1
IGMP Snooping Querier Configuration
IGMP snooping querier should be used to support IGMP snooping in a VLAN where PIM
and IGMP are not configured.
When the IGMP snooping querier is enabled, the IGMP snooping querier sends out peri-
odic general queries that trigger membership report messages from a host that wants to
receive multicast traffic. The IGMP snooping querier listens to these membership reports
to establish appropriate forwarding.
Enabling IGMP Snooping
Querier
To enable the IGMP snooping querier, use the following command.
Command
Mode
Description
ip igmp snooping querier
[
ad-
dress
A.B.C.D
]
Global
Enables the IGMP snooping querier globally.
A.B.C.D: source address of IGMP snooping query
ip igmp snooping vlan
VLANS
querier
[
address
A.B.C.D
]
Enables the IGMP snooping querier on a VLAN.
VLANS: VLAN ID (1-4094)
To disable the IGMP snooping querier, use the following command.
Command
Mode
Description
no ip igmp snooping querier
[
address
]
Global
Disables the IGMP snooping querier.
address: source address of IGMP snooping query
no ip igmp snooping vlan
VLANS
querier
[
address
]
If you do not specify a source address of an IGMP snooping query, the IP address config-
ured on the VLAN is used as the source address by default. If no IP address is configured
on the VLAN, 0.0.0.0 is then used.
IGMP Snooping Query Interval
An IGMP snooping querier periodically sends general query messages to trigger mem-
bership report messages from a host that wants to receive IP multicast traffic.
To specify an interval to send general query messages, use the following command.
Command
Mode
Description
ip igmp snooping querier query-
interval
<1-1800>
Global
Specifies an IGMP snooping query interval in the unit
of second.
1-1800: query interval (default: 125)
ip igmp snooping vlan
VLANS
querier query-interval
<1-1800>
Specifies an IGMP snooping query interval on a VLAN.
VLANS: VLAN ID (1-4094)
To delete a specified interval to send general query messages, use the following com-
i