Cisco Systems 3750E manual Displaying MLD Snooping Information, 25-11

Chapter 25 Configuring IPv6 MLD Snooping

Displaying MLD Snooping Information

This example shows how to set the MLD snooping global robustness variable to 3:

Switch# configure terminal

Switch(config)# ipv6 mld snooping robustness-variable 3

Switch(config)# exit

This example shows how to set the MLD snooping last-listener query count for a VLAN to 3:

Switch# configure terminal

Switch(config)# ipv6 mld snooping vlan 200 last-listener-query-count 3

Switch(config)# exit

This example shows how to set the MLD snooping last-listener query interval (maximum response time) to 2000 (2 seconds):

Switch# configure terminal

Switch(config)# ipv6 mld snooping last-listener-query-interval 2000

Switch(config)# exit

Disabling MLD Listener Message Suppression

MLD snooping listener message suppression is enabled by default. When it is enabled, the switch forwards only one MLD report per multicast router query. When message suppression is disabled, multiple MLD reports could be forwarded to the multicast routers.

Beginning in privileged EXEC mode, follow these steps to disable MLD listener message suppression:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	no ipv6 mld snooping	Disable MLD message suppression.
	listener-message-suppression
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show ipv6 mld snooping	Verify that IPv6 MLD snooping report suppression is
		disabled.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To re-enable MLD message suppression, use the ipv6 mld snooping listener-message-suppression

global configuration command.

Displaying MLD Snooping Information

You can display MLD snooping information for dynamically learned and statically configured router ports and VLAN interfaces. You can also display MAC address multicast entries for a VLAN configured for MLD snooping.

To display MLD snooping information, use one or more of the privileged EXEC commands in Table 25-2.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		25-11