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GS716T and GS724T Gigabit Smart Switches
CST Port Status
Use the Spanning Tree CST Port Status page to display Common Spanning Tree (CST) and
Internal Spanning Tree on a specific port on the switch.
To display the Spanning Tree CST Port Status page, click
Switching
STP
Advanced
CST Port Status
.
The following table describes the CST Status information displayed on the screen.
Field
Description
Interface
Select a physical or port channel interface to configure. The port is
associated with the VLAN(s) associated with the CST.
Port Role
Each MST Bridge Port that is enabled is assigned a Port Role for each
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 lower
cost are less likely to be blocked if STP detects loops.
Designated Bridge
Bridge Identifier of the bridge with the Designated 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.
Topology Change
Acknowledge
Identifies whether the next BPDU to be transmitted for this port would have
the topology change acknowledgement flag set. It is either
True
or
False
.
Edge Port
Indicates whether the port is enabled as an edge port. Possible values are
Enabled
or
Disabled
.
Point-to-point MAC
Derived value indicating whether the port is part of a point-to-point link.
