Patent ID: 8693398

Claim:
A method of providing interchassis redundancy within a mobile gateway that provides mobile service provider network subscribers with access to services of a packet data network, the method comprising: receiving, with a first member chassis of the mobile gateway, a redundancy group that defines a backup association between a subscriber management service unit of a plurality of subscriber management service units within the first member chassis and a subscriber management service unit of a plurality of subscriber management service units within a second member chassis of the mobile gateway; negotiating, with the first member chassis, parameters for a communication channel for the redundancy group; anchoring, with the subscriber management service unit within the first member chassis, one or more subscriber sessions for subscribers attached to the mobile gateway via the mobile service provider network when the first member chassis is an active chassis for the mobile gateway; and sending, when the first member chassis is an active chassis for the mobile gateway and via the communication channel for the redundancy group, subscriber session data for the subscriber sessions from the subscriber management service unit within the first member chassis to the subscriber management service unit within the second member chassis.