Loop locating apparatus and loop locating method in layer 3...

Details Loop locating apparatus and loop locating method in layer 3... Loop locating apparatus and loop locating method in layer 3...

2006-08-08

2010-10-26

Shah, Chirag G (Department: 2477)

Multiplex communications

Diagnostic testing

Loopback

C370S400000

Reexamination Certificate

active

07821952

ABSTRACT:
A loop locating apparatus and method enabling simple and fast identification of a Layer3loop fault occurring in a network, wherein, when the possibility of a Layer3loop is detected, a loop locating command function unit makes a packet transmission/reception function unit send a series of inspection packets (Pis) with successively incremented TTLs and monitors the return packets (te) of the inspection packets (Pis) by a return number counting function unit and wherein a loop location decision function unit finds the routers returning packets (te) with remarkably larger return numbers than the others and identifies the routers with return numbers over a predetermined threshold as the location of occurrence of the loop.

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Notice of Reasons for Rejection dated Jun. 8, 2010 for corresponding Japanese Application No. 2006-099691.

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