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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter34 Configuring IP Multicast Routi ng Configuring Optional Multicast Routing Features
Configuring Optional Multicast Routing Features
These sections describe how to configure optional multicast routing features:
•Configuring sdr Listener Support, page 34-31 (optional)—for MBONE multimedia conference
session and set up
•Configuring an IP Multicast Boundary, page 34-32 (optional)—to control bandwidth utilization.

Configuring sdr Listener Support

The MBONE is the small subset of Internet routers and hosts that are interconnected and capable of
forwarding IP multicast traffic. Other multimedia content is often broadcast over the MBONE. Before
you can join a multimedia session, you need to know what multicast group address and port are being
used for the session, when the session is going to be active, and what sort of applications (audio, video,
and so forth) are required on your workstation. The MBO NE Se ssion Di rect o ry Version 2 (sdr) tool
provides this information. This freeware application can be downloaded from several sites on the Wor ld
Wide Web, one of which is http://www.video.ja.net/mice/index.html.
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 list en t o sess ion d ire ctor y ad vertise ment s. Thi s
procedure is optional.
To disable sdr support, use the no ip sdr listen interface configuration command.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface to be enabled for sdr, and enter interface
configuration mode.
Step3 no shutdown Enable the port, if necessary. By default, UNIs are disabled, an d NNIs are
enabled.
Step4 ip sdr listen Enable sdr listener support.
Step5 end Return to privileged EXEC mode.
Step6 show running-config Verify your entries.
Step7 copy running-config startup-config (Optional) Save your entries in the configuration file.