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# Managing Services on MX Series Routers Using the Diameter Application

You can use the SRC software to manage services on Juniper Networks routing platforms using the Diameter protocol. The SRC software communicates with the local SRC peer on the device using Diameter messages to dynamically manage services for a subscriber session.

The SRC software includes a Diameter server that forwards AAR, ACR, SRQ, and STR messages from JSRC to the device driver in the SAE and that forwards PPR and ASR messages from the device driver to JSRC. These Diameter messages perform these functions:

- AA-Request (AAR)—Attach subscriber to access network
- Accounting-Request (ACR)—Provide accounting information
- Abort-Session-Request (ASR)—Disconnect subscriber
- Push-Profile-Request (PPR)—Start, modify, or stop service session
- Session-Resource-Query (SRQ)—Initiate synchronization
- Session-Termination-Request (STR)—Detach subscriber from access network

You configure the Diameter peers and a device for each device managed by the SAE. The Diameter server searches all devices of type intelligent-service-edge for virtual routers that include the local host in their SAE connections. For these devices, the Diameter server establishes a connection with the peers referenced in the device configuration.

Tasks to set up the management of services on devices using Diameter protocol:

- Configuring JSRC on the MX Series Router
- Configuring the Diameter Application (SRC CLI)
- Adding Network Devices (SRC CLI)
- Configuring Diameter Peers (SRC CLI)
- Configuring the SAE to Manage Network Devices (SRC CLI)
- Configuring JSRC Policies (SRC CLI)

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