Data-triggered subscriber management

Prerequisites

This feature allows the creation of ESM subscribers and hosts based on the receipt of upstream data packets.

Data-triggered host creation does not rely on protocol triggers (DHCP, PPPoE) or management triggers (static hosts) to create each host, and is especially useful in the following cases:

BNG authenticates, creates, and deletes subscriber hosts as follows:

Procedure


  1. The subscriber SAP, including MSAP, receives a user packet that does not match existing anti-spoof table entries.


  2. BNG instantiates an IPoE session if there is no existing session with the same session key, and performs authentication using LUDB and RADIUS.

    Note: Data-triggered ESM is supported only with IPoE sessions.

  3. A subscriber host is created with the ESM strings provided during authentication.


  4. The subscriber host is deleted when session-timeout or idle-timeout expires, CoA triggers a disconnect, SHCV check failure, or management (CLI, SNMP, and so on) triggers a host deletion.

    Note: There are no automatic triggers to delete a host if session-timeout or idle-timeout and SHCV are not configured.