Switch apparatus and network system

Details Switch apparatus and network system Switch apparatus and network system

2011-06-28

2011-06-28

Yao, Kwang B (Department: 2473)

Multiplex communications

Diagnostic testing

Fault detection

C370S249000, C714S716000

Reexamination Certificate

active

07969895

ABSTRACT:
A switch apparatus providing with a loop detection function sets a port identification to a port which activates the loop detection function, only receives the loop detection frame by a high-order port in the switch apparatus connected with a backbone network or a high-order switch apparatus on the basis of the port identification set previously, and controls an inactivation of a sending source low-order port that sent the loop detection frame, when the loop detection frame is received by the high-order port.

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IEEE Standards 802.1D, “IEEE Standard for Local and metropolitan area networks”, Jun. 9, 2004.

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