Patent ID: 7539739
Filing Date: 2009-05-26
Classification: H04L

Abstract:
1. A network system comprising: a plurality of router devices; a plurality of sub-networks, each of which connects apparatuses; and a Net ID server operable to assign the Net IDs to said plurality of sub-networks, wherein said plurality of sub-networks are identified by respective Net IDs, and are connected via said plurality of router devices to form a tree structure, and each of said plurality of router devices includes: wherein each of said cold start units is further operable to perform the cold start by storing the Net IDs assigned by said Net ID server into each of said router data storage units, respectively, and wherein each of said cold start units is further operable to cause each of said plurality of router devices connected to the downstream sub-network of the router device in which said cold start unit is included to perform the cold start by sending a Net ID write request to each of said plurality of router devices connected to the downstream sub-network, the Net ID write request being a request indicating that the Net IDs of the respective downstream sub-networks should be updated to the Net IDs assigned by said Net ID server.