VPN composing method, interwork router, packet communication method, data communication apparatus, and packet relaying apparatus
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United States of America Patent
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Oct 14, 2003
Grant Date -
N/A
app pub date -
Sep 9, 1999
filing date -
May 27, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method serves to compose a VPN (Virtual Private Network) over a plurality networks each of which is managed by different Internet Service Providers (ISP). When a packet with a first capsule header used for composing a VPN in a first ISP network is transmitted to a second ISP network, a route for outputting packet to the second ISP network is determined based on the information both in the capsule header and in the IP header. In addition, a second capsule header used for composing a VPN in the second ISP network is determined based on the above information.
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