> Spanning Tree State – Enable/disabled this switch to participate in a STA-
compliant network.
> Priority – Bridge priority is used in selecting the root device, root port, and
designated port. The device with the highest priority becomes the STA root
device. However, if all devices have the same priority, the device with the low-
est root device.
- Default
: 32768
- Range
: 0 - 65535
> Hello Time – Interval (in seconds) at which the root device transmits a configu-
ration message.
- Default
: 2
- Minimum
: 1
- Maximum
: The lower of 10 or [(Max. Message Age / 2) -1]
> Maximum Age – The maximum time (in seconds) a device can wait without
receiving a configuration message before attempting to reconfigure. All device
ports (except for designated ports) should receive configuration messages at
regular intervals. Any port that ages out STA information (provided in the last
configuration message) becomes the designated port for the attached LAN. If
it is a root port,a new root port is selected from among the device ports
attached to the network. (References to “ports” in this section means “inter-
faces,” which includes both ports and trunks.)
- Default
: 20
- Minimum
: The higher of 6 or [2 x (Hello Time + 1)].
- Maximum
: The lower of 40 or [2 x (Forward Delay - 1)]
> Forward Delay – The maximum time (in seconds) the root device will wait
before changing states (i.e., listening to learning to forwarding). This delay is
required because every device must receive information about topology
changes before it starts to forward frames. In addition, each port needs time to
listen for conflicting information that would make it return to a blocking state;
otherwise, temporary data loops might result.
- Default
: 15
- Minimum
: The higher of 4 or [(Max. Message Age / 2) + 1]
- Maximum
: 30
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