When the last subscriber host associated with an IPoE session is deleted from the system, then the IPoE session is also deleted.
An IPoE session and all associated subscriber hosts can be deleted by the following:
CLI clear command: clear service id <service-id> ipoe session
An ipoe-session no shutdown CLI command on a group-interface
A no ipoe-session CLI command on a group-interface. This command resets to the default behavior, which is IPoE sessions disabled.
Session timeout, configured in the IPoE session policy or obtained from AAA
Idle timeout
RADIUS Disconnect Message
Diameter Gx session termination
Credit Control: Radius or Diameter Gy