Patent ID: 9137140
Filing Date: 2015-09-15
Classification: H04L,H04W

Abstract:
1. A method comprising: at a software defined network controller for a network comprising a plurality of network elements in communication with the controller, each of the network elements capable of serving as a point of attachment of a virtual or physical host, detecting when a host has moved between network elements; generating a list of network elements to which the host has roamed, the list being sorted by time when the host is attached to a network element so that a most recent network element to which the host is attached is the root network element and at a head of the list; updating the root network element in the list first for traffic flow associated with the host; and sending commands to the network elements to which the host has roamed to program a tunnel from each previous point of attachment network element in the list to the most recent root network element in the list in reverse order of the roaming path so as to route traffic for the host via a tunnel.