Lantech IPES-5408T, User Manual

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6.15.5. MSTP Bridges Status
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Instance
The Bridge Instance. ex: CIST, MSTI1, ...
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Bridge ID
The Bridge ID of this Bridge instance.
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Root ID
The Bridge ID of the currently elected root bridge.
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Root Port
The switch port currently assigned the root port role.
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Root Cost
Root Path Cost. For the Root Bridge it is zero. For all other Bridges, it is the sum of
the Port Path Costs on the least cost path to the Root Bridge.
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Topology State
The current state of the Topology Change Flag of this Bridge instance.
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Topology Change Last
The time since last Topology Change occurred.