Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2006-05-26
2009-08-18
Hoang, Thai D (Department: 2416)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S225000
Reexamination Certificate
active
07577089
ABSTRACT:
An apparatus for fast failure switch over in an ETHERNET switch includes redundant switch (trunk) ports (a main and a backup) and hardware and software logic for redirecting traffic to the backup port when the main port (or the link associated with it) fails. The switchover is immediate and is based on the content of a local status register which indicates the port (link) status. Thus, frames addressed to the dead port are redirected to the backup port and few frames are lost. The STP function may proceed concurrently and eventually no more frames are addressed to the dead port.
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Marty Diego
Shanley Timothy M.
Varada Srihari
Yeo Michael Singngee
Gordon & Jacobson, PC
Hoang Thai D
Transwitch Corporation
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