Cisco Systems 3750E Enabling sdr Listener Support, Limiting How Long an sdr Cache Entry Exists

Chapter 42 Configuring IP Multicast Routing

Configuring Optional Multicast Routing Features

Enabling sdr Listener Support

By default, the switch does not listen to session directory advertisements.

Beginning in privileged EXEC mode, follow these steps to enable the switch to join the default session directory group (224.2.127.254) on the interface and listen to session directory advertisements. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface interface-id	Specify the interface to be enabled for sdr, and enter interface
		configuration mode.
Step 3
	ip sdr listen	Enable sdr listener support.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	show running-config	Verify your entries.
Step 6
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To disable sdr support, use the no ip sdr listen interface configuration command.

Limiting How Long an sdr Cache Entry Exists

By default, entries are never deleted from the sdr cache. You can limit how long the entry remains active so that if a source stops advertising SAP information, old advertisements are not needlessly kept.

Beginning in privileged EXEC mode, follow these steps to limit how long an sdr cache entry stays active in the cache. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	ip sdr cache-timeout minutes	Limit how long an sdr cache entry stays active in the cache.
		By default, entries are never deleted from the cache.
		For minutes, the range is 1 to 4294967295.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show running-config	Verify your entries.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To return to the default setting, use the no ip sdr cache-timeoutglobal configuration command. To delete the entire cache, use the clear ip sdr privileged EXEC command.

To display the session directory cache, use the show ip sdr privileged EXEC command.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
42-36	OL-9775-02