Link state routing device in ATM communication system
AssigneeNEC Corporation
InventorAtsushi Iwata
Life of this patent
Estimating the term…
Abstract
A link state routing device reduces amount of link state information exchanged in a network irrespective of number of links connecting between adjacent switches. Hello protocol portion detects adjacent switches in the network, to which respective of links are connected. A link abstracted portion obtains an abstracted link by virtually aggregating a plurality of links connected to the same switch, and generates a link state with respect to abstracted link with uniting link state information of a plurality of links. The link state update protocol portion has link topology information synchronized in the network by distributing the abstracted link state information with flooding mechanism. Since the abstracted link represents a plurality of links, information amount to be distributed can be reduced.
Claims10
A switching device for forwarding packets based on exchanging routing information within a communication network arranged at branch points of transmission path of the communication network, comprising:
- switching means for forwarding said packets;
- neighbor link state registering means for registering neighbor link state information indicative of transmission characteristics of transmission links forming said communication network, with respect to each of said transmission links, to which one end of said switching means is connected;
- adjacent switching device detecting means for detecting adjacent switching devices means connected to other ends of those of said transmission links to which said switching means is connected;
- abstracted link configuring means for virtually aggregating said transmission links registered in said link state registering means and having the other ends connected to the same switching device, and setting an abstracted link;
- and
- abstracted link state distributing means for generating an abstracted link state information representative of transmission characteristics of said abstracted link virtually set on the basis of said link state information with respect to each individual links aggregated as said abstracted link by said abstracted link configuring means and distributing said abstracted link state information to all of other switching devices in said communication network.
Dependencies are inferred from the claim text.