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XS712T Smart Switch
CST Port Status
Use the CST Port Status screen to display Common Spanning Tree (CST) and Internal
Spanning Tree on a specific port on the switch.
To display the CST port status for a specific port:
1. Select Sw
itching STP Advanced CST Port Status.
The following table describes the CST Status information displayed on the screen.
Field Description
Interface Displays the port associated with the VLAN(s) associated with the
CST.
Port Role Each MST Bridge Port that is enabled is assigned a Port Role for
ea
ch spanning tree. The port role will be one of the following
values: Root Port, Designated Port, Alternate Port, Backup
Port, Master Port, or Disabled Port.
Designated Root Root Bridge for the CST. It is made up using the bridge priority and
the base
MAC address of the bridge.
Designated Cost Displays cost of the port participating in the STP topology. Ports
with a low
er cost are less likely to be blocked if STP detects loops.
Designated Bridge Bridge Identifier of the bridge with the Desig
nated Port. It is made
up using the bridge priority and the base MAC address of the
bridge.
Designated Port Port Identifier on the Designated Bridge that offers the lowest cost
to the
LAN. It is made up from the port priority and the interface
number of the port.