MOBILITY IN IP NETWORKS USING LISP AND OPENWRT

Abstract

Because the Internet was originally designed to interconnect several hundreds of networks and now has more than one billion hosts, scalability issues have started to appear. The current scalability of today’s Internet architecture is mainly due to the use of a single IP address space, both for identifying host transport sessions, and for routing networks. Due to the large amount of information on the Internet, routing protocols have an important role. The size of the routing tables in the Default Free Zone (DFZ) is steadily increasing. The underlying reasons for this rapid growth are the independent addresses of suppliers and multihoming. In order to help solve these scalability problems associated with the said increase, the LISP (Locator Identifier Separation Protocol) was developed. It allows the separation of IP addresses into two different address spaces: the identity of the device, known as Endpoint Identifier (EID), and its location, known as the Routing Locator (RLOC), as opposed to the current routing architecture and IP addressing, which use a single addressing space, the IP address. The approach described in this paper demonstrates two advantages of the LISP Protocol: 1. It allows changing the connection of an ongoing call using the Circuit by Unify application, from a wireless network to a 3G network without losing the connection, based on the use of the open-source LISP implementation Open Overlay Router (OOR) as a platform and 2. A user can be addressed using the assigned IP address, irrespective of the network connection used.