Spanning Tree Protocol (STP) Commands
8039_en_01
PHOENIX CONTACT
2-17
If you specify 0 (defined as the default CIST ID) as the
<mstid>
, this command displays the
settings and parameters for a specific switch port within the common and internal spanning
tree. The
<slot/port
> is the desired switch port. In this case, the following are displayed.
Port Identifier
The port identifier for the specified port within the selected MST instance. It is made up from the port
priority and the interface number of the port.
Port Priority
The priority for a particular port within the selected MST instance. The port priority is displayed in
multiples of 16.
Port Forwarding
State
Current spanning tree state of this port.
Port Role
Each enabled MST Bridge Port receives a Port Role for each spanning tree. The port role is one of the
following values: Root Port, Designated Port, Alternate Port, Backup Port, Master Port or Disabled Port
Auto-Calculate
Port Path Cost
Indicates whether auto calculation for port path cost is enabled.
Port Path Cost
Configured value of the Internal Port Path Cost parameter.
Auto-Calculate
External Port Path
Cost
Indicates whether auto calculation for external port path cost is enabled.
External Port Path
Cost
Configured value of the external Port Path Cost parameter.
Designated Root
The Identifier of the designated root for this port.
Designated Port
Cost
Path Cost offered to the LAN by the Designated Port.
Designated Bridge
Bridge Identifier of the bridge with the Designated Port.
Designated Port
Identifier
Port on the Designated Bridge that offers the lowest cost to the LAN.
Term
Definition
Term
Definition
Port Identifier
The port identifier for this port within the CST.
Port Priority
The priority of the port within the CST.
Port Forwarding
State
The forwarding state of the port within the CST.
Port Role
The role of the specified interface within the CST.
Port Path Cost
The configured path cost for the specified interface.
Designated Root
Identifier of the designated root for this port within the CST.
Designated Port
Cost
Path Cost offered to the LAN by the Designated Port.
Designated Bridge
The bridge containing the designated port.
Designated Port
Identifier
Port on the Designated Bridge that offers the lowest cost to the LAN.
Topology Change
Acknowledgement
Value of flag in next Configuration Bridge Protocol Data Unit (BPDU) transmission indicating if a
topology change is in progress for this port.
Hello Time
The hello time in use for this port.
Edge Port
The configured value indicating if this port is an edge port.
Edge Port Status
The derived value of the edge port status. True if operating as an edge port; false otherwise.
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