Advantech EKI-9512-C0IDW10E, Руководство пользователя

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225 EKI-9500 Series User Manual
4.4.19.5 CST Port
Use the Spanning Tree CST Port Summary page to view and configure the Common
Spanning Tree (CST) settings for each interface on the device.
To access this page, click Switching > Spanning Tree > CST Port .
Figure 4.250 Switching > Spanning Tree > CST Port
Spanning Tree Tx
Hold Count The maximum number of BPDUs that a bridge is allowed to send
within a hello time window.
Bridge Identifier A unique value that is automatically generated based on the bridge pri-
ority value and the base MAC address of the bridge. When electing the
root bridge for the spanning tree, if the bridge priorities for multiple
bridges are equal, the bridge with the lowest MAC address is elected
as the root bridge.
Time Since Topology
Change The amount of time that has passed since the topology of the spanning
tree has changed since the device was last reset.
Topology Change
Count The number of times the topology of the spanning tree has changed.
Topology Change Indicates whether a topology change is in progress on any port
assigned to the CST. If a change is in progress the value is True; other-
wise, it is False.
Designated Root The bridge identifier of the root bridge for the CST. The identifier is
made up of the bridge priority and the base MAC address.
Root Path Cost The path cost to the designated root for the CST. Traffic from a con-
nected device to the root bridge takes the least-cost path to the bridge.
If the value is 0, the cost is automatically calculated based on port
speed.
Root Port The port on the bridge with the least-cost path to the designated root
for the CST.
Max Age The amount of time a bridge waits before implementing a topological
change.
Forward Delay The forward delay value for the root port bridge.
Hold Time The minimum amount of time between transmissions of Configuration
BPDUs.
CST Regional Root The bridge identifier of the CST regional root. The identifier is made up
of the priority value and the base MAC address of the regional root
bridge.
CST Path Cost The path cost to the CST tree regional root.
Submit Click Submit to save the values and update the screen.
Refresh Click Refresh to update the screen.
Cancel Click Cancel to restore default value.
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