Multiplex communications – Network configuration determination – Using a particular learning algorithm or technique
Reexamination Certificate
2005-04-25
2010-12-07
Ahmed, Salman (Department: 2476)
Multiplex communications
Network configuration determination
Using a particular learning algorithm or technique
C370S401000
Reexamination Certificate
active
07848264
ABSTRACT:
A method for operating a computer network includes: a become_root_primary command is issued to a first router to set an ID so that a spanning tree protocol (STP) selects the first router as a primary root router; a become_root_secondary command is issued to a second router to set an ID so that STP selects the second router as a secondary root router; transitioning, in response to failure of the first router, the second router to become the root router. An enable_uplinkfast command is issued to a router, and the router selects a backup designated port for a designated port, and selects a backup root port for a root port. Ports transmit BPDU messages as heartbeat messages, and a failure to detect the BPDU messages results in a backup port assuming the role of a port not detecting the BPDU messages.
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Dutt Dinesh G.
Gai Silvano
McCloghrie Keith
Ahmed Salman
Cesari and McKenna LLP
Cisco Technology Inc.
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