CHAPTER 12: SPANNING TREE PROTOCOL (STP)

SPANNING TREE PROTOCOL (STP)

priority [port=<numberlistrange>] value=<0-255 0-65535>

The cost command is port specific. A path cost is assigned to individual ports for the switch to determine which ports are the forwarding points. A higher cost means the link is “more expensive” to use and falls in the passive mode compared to the link with a lower cost. Value ranges from 0 to 65535, with a default value of 32768.

cost port=<numberlistrange> value=<0-65535>

The port command assigns ports to STP. If you are unsure, let the software make the decisions. The status parameter enables or disables a port from participating in STP discovery. Its best to only allow trunk ports to participate in STP. End stations need not participate in STP process.

port port=<numberlistrange> status=<enabledisable>

The timers command changes the STP forward delay, hello timer and aging timer values. The forward-delayparameter indicates the time duration the switch will wait from listening to learning states and from learning to forwarding states. The value ranges from 4 to 30 seconds with a default value of 15. When the switch is the root device, the hello parameter represents the time between messages being transmitted. The value is from 1 to 10 seconds with a default value is 2. The age parameter is the maximum time a message with STP information is allowed by the switch before the switch discards the information and updates the address table again. Value ranges from 6 to 40 seconds with default value of 20.

timers forward-delay=<4-30> hello=<1-10> age=<6-40>

MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL

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GE ML1200 instruction manual Timers forward-delay=4-30 hello=1-10 age=6-40