Switched Ethernet path detection

Details Switched Ethernet path detection Switched Ethernet path detection

2005-10-04

2005-10-04

Chin, Wellington (Department: 2664)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S402000, C370S404000

Reexamination Certificate

active

06952421

ABSTRACT:
A method and apparatus for discovering paths to other network devices includes a protocol and network management application that can be executed on network devices. The Ethernet protocol is used to detects paths to other network devices, knowing only the Ethernet address of the destination. A discovery protocol is extended to add hop probe and hop probe reply Type-Length-Value fields in a variable-length list. The hop probe fields contain a hop count, a destination Ethernet address, and a source Ethernet address. When a hop probe is received by a network device, the hop count field is decremented by one and the hop probe is forwarded. Packet received with a hop count of one are not forwarded and a hop probe reply is sent back to the Ethernet source address of the hop probe. The hop probe reply fields contain a destination Etherned address and a source Ethernet address.

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