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The following global attributes display statistical values and cannot
be changed:
•Configuration Changes – The number of times the Spanning
Tree has been reconfigured.
•Last Topology Change – Time since the Spanning Tree was
last reconfigured.
The following global attributes can be configured:
•Spanning Tree State – Enables/disables 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 lowest MAC address
will then become the root device. (Note that lower numeric
values indicate higher priority.)
- Default: 32768
- Range: 0 - 65535
•Hello Time – Interval (in seconds) at which the root device
transmits a configuration 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