Configuring The Igmp Last Member Query Count (Cli) - Cisco Catalyst 3850 series Configuration Manual

Configuring IGMP
Command or Action
Step 2
configure terminal
Example:
Device# configure terminal
Step 3 ip igmp snooping robustness-variable count
Example:
Device(config)# ip igmp snooping
robustness-variable 3
Step 4 ip igmp snooping vlan vlan-id
robustness-variable count
Example:
Device(config)#ip igmp snooping vlan 100
robustness-variable 3
Step 5
end
Example:
Device(config)# end
Step 6 show ip igmp snooping
Example:
Device# show ip igmp snooping
Step 7 copy running-config startup-config
Example:
Device# copy running-config startup-config

Configuring the IGMP Last Member Query Count (CLI)

To configure the number of times the device sends IGMP group-specific or group-source-specific (with IGMP
version 3) query messages in response to receiving a group-specific or group-source-specific leave message,
use this command.
OL-32598-01
Purpose
Enters the global configuration mode.
Configures the IGMP robustness variable. The range is 1 to 3
times.
The recommended value for the robustness variable is 2. Use this
command to change the value of the robustness variable for IGMP
snooping from the default (2) to a specified value.
(Optional) Configures the IGMP robustness variable on the VLAN
interface. The range is 1 to 3 times. The recommended value for
the robustness variable is 2.
Note
Returns to privileged EXEC mode.
(Optional) Displays the configured IGMP robustness variable
count.
(Optional) Saves your entries in the configuration file.
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E (Catalyst 3850 Switches)
How to Configure IGMP Snooping
Configuring the robustness variable count on a VLAN
overrides the globally configured value.
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