Cabletron Systems NB30, Руководство пользователя

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USING BRIDGE MANAGEMENT OPTIONS
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Topology Change Count:
Indicates the number of times the bridge's Topology Change flag has been
changed since the bridge was powered up or initialized.
Root Cost:
Indicates the value or cost of the data path from the bridge to the root
bridge.
Root Port:
Displays the port identifier for the port that provides the lowest cost path
to the root.
Hello Time:
Indicates, in seconds, the length of time the root bridge, or bridge
attempting to become the root, waits before resending configuration
BPDUs.
Bridge Max Age:
If the bridge is the root bridge, or is attempting to become the root, this
field displays information that indicates the maximum time a BPDU can
exist before it is discarded. The default value for this field is 20 seconds.
Bridge Forward Delay:
If the bridge is the root bridge, or is attempting to become the root, this
field displays the time period the bridge will spend in the listening state,
i.e., listening to BPDU activity on the network while moving from the
blocking to the learning state. The time displayed also indicates the time
spent in the learning state while moving from the listening to the
forwarding state. The default value for this field is 15 seconds.
Time Since Topology Change:
Indicates, in seconds, the time that has elapsed since the bridge's
Topology Change Flag last recorded the value of a topology change.
Topology Change:
Indicates if a bridge topology change is in progress. This field will display
0 or 1; A 0 indicates that no change is occurring. A 1 indicates that a
change is occurring.