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Configuring SAP and SDP (Optional)

Multicast session announcements are handled by two protocols, the Session Announcement Protocol (SAP) and Session Description Protocol (SDP). These two protocols display multicast session names and correlate the names with multicast traffic. Enabling SDP and SAP allows the router to receive announcements about multimedia and other multicast sessions from sources. Enabling SAP automatically enables SDP.

For more information on SAP and SDP, see the JUNOS Multicast Protocols Configuration Guide.

The Services Router listens for session announcements on one or more addresses and ports. By default, the router listens to address and port 224.2.127.254:9875.

To configure SAP and SDP for the Services Router:

  1. Navigate to the top of the configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 44.
  3. Go on to Configuring IGMP (Required).

Table 44: Configuring SAP and SDP

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Listen level in the configuration hierarchy.
  1. In the J-Web interface, select Configuration>View and Edit>Edit Configuration.
  2. Next to Protocols, click Configure or Edit.
  3. Next to Sap, click Configure or Edit.
  4. Click Add new entry next to Listen.

From the [edit] hierarchy level, enter

edit protocols sap

(Optional) Enter one or more addresses and ports for the Services Router to listen to session announcements on. By default, the Services Router listens to address and port 224.2.127.254:9875.
  1. In the Address box, type the multicast address the Services Router can listen to session announcements on, in dotted decimal notation.
  2. In the Port box, type the port number in decimal notation.
  3. Click OK.
  1. Set the address value to the IP address that the Services Router can listen to session announcements on, in dotted decimal notation. For example:

    set listen 224.2.127.254

  2. Set the port value to the number of the port that the Services Router can listen to session announcements on, in decimal notation. For example:

    set listen 224.2.127.254 port 9875.
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