Method and apparatus for applying once-only processing in a...

Details Method and apparatus for applying once-only processing in a... Method and apparatus for applying once-only processing in a...

H - Electricity

04

L

H04L 12/24 (2006.01) H04L 12/18 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2308695

Duplicate processing at network operators is avoided by applying once-only processing at operators which are adjacent to either the source or destination host of a data packet. An operator is adjacent to a host if there exists a path between the operator and the host containing no other operators. In one embodiment, an operator determines that it is adjacent to a host if it receives a special broadcast data packet from the host. To ensure that no other operators receive the special broadcast data packet, the adjacent operator drops the packet. In another embodiment, operators determine whether they are adjacent to identified hosts by transmitting special ping packets to the hosts. If an operator receives a ping response from the host, the operator determines that it is adjacent to the host. To ensure that only adjacent operators receive ping responses, intervening operators drop special ping packets received from other operators.

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