Patent ID: 8155131
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A method for communication between Internet Protocol (IP) devices, comprising: establishing, by an internal router, a neighbor relation in a dynamic routing protocol with each of physical routers in a virtual router, using actual IP address; receiving, by the internal router, a dynamic routing protocol control packet sent by said each of physical routers in the virtual router; obtaining a virtual IP address according to the dynamic routing protocol control packet and a correspondence relation of the actual IP address and the virtual IP address; receiving, by a first neighbor module of said internal router, the dynamic routing protocol control packet carrying an actual IP address and a Type 9 Link State Advertisement (LSA) packet carrying a binding relation of the actual IP address and the virtual IP address sent by each of the physical routers, obtaining the actual IP address according to the dynamic routing protocol control packet, obtaining the binding relation of the actual IP address and the virtual IP address from the Type 9 LSA and sending the actual IP address and the binding relation to a first calculating module of said internal router; finding out, by said first calculating module of said internal router, that the IP address of the next hop is the actual IP address of the physical router according to the dynamic routing protocol when performing route calculation, obtaining the virtual IP address according to the binding relation by using the actual IP address, and substituting the virtual IP address for the IP address of the next hop; and using the virtual IP address as a next hop address and sending information to an external network to the virtual router.