GE ML1200 instruction manual Show-timers, Port port=numberlistrange status=enabledisable

RAPID SPANNING TREE PROTOCOL CHAPTER 13: RAPID SPANNING TREE PROTOCOL

The show-timerscommand displays the values of the timers set for RSTP.

show-timers

The priority command specifies the switch (bridge) priority value. This value is used along with the switch MAC address to determine which switch in the network is the root device. Lower values mean higher priority. The value ranges from 0 to 65535 with a default of 32768. When port are specified, the priority is associated with ports and their value is 0 to 255.

priority [port=<numberlistrange>] value=<0-2550-65535>

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. The value of the cost command ranges from 0 to 65535, with a default of 32768.

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

The port command assigns ports for RSTP. Note that specific ports may not need to participate in RSTP process. These ports typically would be end-stations. If unsure, it is best to let the software make the decisions.

port port=<numberlistrange> status=<enabledisable>

The status parameter enables or disables a port from participating in RSTP discovery. Its best to only allow trunk ports to participate in RSTP; end stations need not participate in the RSTP process.

The timers command changes the STP forward delay, hello timer and aging timer values.

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

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 of 15.

The hello parameter represents the time between messages being transmitted when the switch is the root device. The value is 1 to 10 seconds, with a default of 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.

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