Patent ID: 7826461
Filing Date: 2010-11-02
Classification: H04L

Abstract:
1. A packet switching system for transmitting and receiving a packet via a packet switching network that is configured by interconnecting a plurality of routing apparatuses, comprising: a routing table storage unit provided in each of the plurality of routing apparatuses, and configured to store a plurality of routing tables, each of the routing tables being generated by a unique routing policy; an identifier inserted in the packet, configured to specify one of the routing tables; and an identifier changer configured to change a value of the identifier within the packet switching network, wherein the routing apparatuses are configured to select a routing table from the plurality of routing tables in accordance with the value of the identifier inserted in the packet received, and to transfer the packet to a destination that is specified by the selected routing table, the packet switching network is interconnected by a plurality of routing domains formed in a prescribed area, the plurality of routing tables are utilized in each of the routing domains, the routing apparatus is deployed at a border with an adjacent routing domain, at the origin or at the end of the routing domain, and the identifier changer is further configured to change the value of the identifier in view of a routing policy utilized in the routing domain to which the packet is to be transferred, and to perform the same process to change the value of the identifier for a prescribed block of the packets in accordance with a type of packet.