UMN:CLI
User Manual
V5824G
344
9.2.2.3
IGMP Snooping Robustness Value
The robustness variable allows tuning for the expected packet loss on a network. If a
network is expected to be lossy, the robustness variable may be increased. When
receiving the query message that contains a certain robustness variable from an IGMP
snooping querier, a host returns the report message as many as the specified robustness
variable.
To configure the robustness variable, use the following command.
Command
Mode
Description
ip igmp snooping
robustness-
variable
<1-7>
Global
Configures the robustness variable. (default: 2)
ip igmp snooping
vlan
VLANS
robustness-variable
<1-7>
Configures the robustness variable on a VLAN.
VLANS: VLAN ID (1-4094)
To delete a specified robustness variable, use the following command.
Command
Mode
Description
no
ip
igmp
snooping
robustness-variable
Global
Deletes a specified robustness variable.
no ip igmp snooping
vlan
VLANS
robustness-variable
9.2.3
IGMPv2 Snooping
9.2.3.1
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
periodic 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
[
address
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)
