Patent ID: 8934419
Filing Date: 2015-01-13
Classification: H04L,H04W

Abstract:
1. A method performed in an access router for protecting a telecommunication network against a flooding attack from a multihomed network node, the access router providing communications between the multihomed network node and a network node working as a correspondent node (CN) for the multihomed network node, the method comprising the steps, each of which is performed by the access router, of: transferring data between the multihomed network node and the CN; determining whether the multihomed network node remains reachable a predetermined time after data transfer between the CN and the multihomed network node begins; if the multihomed network node remains reachable, continuing to transfer data between the CN and the multihomed network node; and upon determining that the multihomed network node is no longer reachable, instructing the CN to flush cached information comprising care-of addresses associated with the multihomed network node, wherein the multihomed network node is a mobile multihomed network node (MMN) having a plurality of IP addresses.