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Method and apparatus for relaying packets based on class of service

  • US 6,965,599 B1
  • Filed: 11/17/2000
  • Issued: 11/15/2005
  • Est. Priority Date: 12/03/1999
  • Status: Expired due to Fees
First Claim
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1. A packet relay apparatus for relaying packets between a node and an IP network, said apparatus comprising:

  • a class processing unit arranged to classify send packets to be relayed to said IP network depending on the types of applications, said class processing unit making allocation of different virtual IP addresses on a class by class basis;

    a send packet relay unit arranged to translate source addresses of said send packets to be relayed to said IP network into virtual IP addresses on a class by class basis, said send packet relay unit establishing IP communication paths on a class by class basis in said IP network; and

    a reply packet relay unit arranged to inversely translate destination addresses of reply packets from said IP network passing through said IP communication paths on a class by class basis into original addresses by reference to the results of address translation effected by said send packet relay unit.

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