Supported Platforms
Configuring the Session Announcement Protocol
The SAP and SDP protocols associate multicast session names with multicast traffic addresses. Only SAP has configuration parameters that users can change. Enabling SAP allows the router to receive announcements about multimedia and other multicast sessions.
Junos OS supports the following SAP and SDP standards:
- RFC 2327, SDP Session Description Protocol
- RFC 2974, Session Announcement Protocol
To enable SAP and the receipt of session announcements, include the sap statement:
You can include this statement at the following hierarchy levels:
- [edit protocols]
- [edit logical-systems logical-system-name protocols]
By default, SAP listens to the address and port 224.2.127.254:9875 for session advertisements. To add other addresses or pairs of address and port, include one or more listen statements.
Sessions established by SDP, SAP's higher-layer protocol, time out after 60 minutes.
To monitor the operation, use the show sap listen command.
