When you use the atm atm1483 subscriber command, as described in atm atm1483 subscriber, to configure IP subscribers on dynamic bridged Ethernet over dynamic ATM 1483 subinterface columns to support RADIUS authentication, the atm atm1483 subscriber command provides the subscriber’s authentication parameters. The dynamic ATM 1483 subinterface acts as the authenticating layer that establishes a session with RADIUS and passes the subscriber’s locally configured username and password information to the RADIUS server.
However, if your router is running stateful SRP switchover (high availability), the use of the atm atm1483 subscriber command in this configuration might suspend stateful SRP switchover on the router or prevent stateful SRP switchover from becoming active. To bypass this limitation, you can use the subscriber management application to configure IP subscribers on dynamic bridged Ethernet interfaces.