Enabling Sdr Listener Support; Limiting How Long An Sdr Cache Entry Exists - Cisco 3845 - Security Bundle Router Software Manual

Configuring Optional Multicast Routing Features
SDR is a multicast application that listens to a well-known multicast group address and port for Session
Announcement Protocol (SAP) multicast packets from SAP clients, which announce their conference
sessions. These SAP packets contain a session description, the time the session is active, its IP multicast
group addresses, media format, contact person, and other information about the advertised multimedia
session. The information in the SAP packet is displayed in the SDR Session Announcement window.

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
Step 1 configure terminal
Step 2 interface interface-id
Step 3
ip sdr listen
Step 4
end
Step 5
show running-config
Step 6
copy running-config startup-config
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
Step 1
configure terminal
Step 2
ip sdr cache-timeout minutes
Step 3 end
Step 4 show running-config
Step 5 copy running-config startup-config
To return to the default setting, use the no ip sdr cache-timeout global 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.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
33-42
Purpose
Enter global configuration mode.
Specify the interface to be enabled for sdr, and enter interface
configuration mode.
Enable sdr listener support.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
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.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Chapter 33 Configuring IP Multicast Routing
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