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    Including Relay Agent Option Values in the PPPoE Remote Circuit ID

    You can enable the router to capture and format a vendor-specific tag containing a PPPoE remote circuit ID value transmitted from a digital subscriber line access multiplexer (DSLAM) device. The router can then send this value to a Remote Authentication Dial-In User Service (RADIUS) server or to a Layer 2 Tunneling Protocol (L2TP) network server (LNS) to uniquely identify subscriber locations.

    By default, the router formats the captured PPPoE remote circuit ID to include only the agent-circuit-id suboption (suboption 1) of the DHCP relay agent information option (option 82). You can use the radius remote-circuit-id-format command to configure the following nondefault formats for the PPPoE remote circuit ID value:

    • Include either or both of the agent-circuit-id (suboption 1) and agent-remote-id (suboption 2) suboptions of the DHCP relay agent information option, with or without the NAS-Identifier [32] RADIUS attribute.
    • Append the agent-circuit-id suboption value to an interface specifier that is consistent with the recommended format in the DSL Forum Technical Report (TR)-101—Migration to Ethernet-Based DSL Aggregation (April 2006).

    For information about configuring the PPPoE remote circuit ID, see the Using the PPPoE Remote Circuit ID to Identify Subscribers and Configuring PPPoE Remote Circuit ID Capture sections in JunosE Link Layer Configuration Guide.


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    Published: 2014-08-20