Verify that SAP and SDP are configured to listen on the correct group addresses and ports.
From the CLI, enter the show sap listen command.
user@host> show sap listen
Group Address Port 224.2.127.254 9875
The output shows a list of the group addresses and ports that SAP and SDP listen on. Verify the following information:
For a complete description of show sap listen output, see the JUNOS Routing Protocols and Policies Command Reference.