Quick Reference Guide

322 | Spanning Tree (STP) Commands
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Format show spanning-tree interface <unit/slot/port>
Mode Privileged EXEC and User EXEC
Hello Time Admin hello time for this port
Port mode Enabled or disabled.
Port Up Time Since Counters Last Cleared Time since port was reset, displayed in days, hours,
minutes, and seconds.
STP BPDUs Transmitted Spanning Tree Protocol Bridge Protocol Data Units sent
STP BPDUs Received Spanning Tree Protocol Bridge Protocol Data Units received.
RST BPDUs Transmitted Rapid Spanning Tree Protocol Bridge Protocol Data Units sent
RST BPDUs Received Rapid Spanning Tree Protocol Bridge Protocol Data Units received.
MSTP BPDUs Transmitted Multiple Spanning Tree Protocol Bridge Protocol Data Units sent
MSTP BPDUs Received Multiple Spanning Tree Protocol Bridge Protocol Data Units received.
show spanning-tree mst port detailed
This command displays the detailed settings and parameters for a specific switch port within a
particular multiple spanning tree instance. The instance <mstid> is a number that corresponds to the
desired existing multiple spanning tree instance. The <unit/slot/port> is the desired switch port.
Format show spanning-tree mst port detailed <mstid> <unit/
slot/port>
Mode Privileged EXEC and User EXEC
MST Instance ID
Port Identifier
Port Priority
Port Forwarding State Current spanning tree state of this port
Port Role
Auto-Calculate Port Path Cost This indicates whether auto calculation for port path
cost is enabled or not.
Port Path Cost Configured value of the Internal Port Path Cost parameter
Auto-Calculate External Port Path Cost This indicates whether auto calculation for
external port path cost is enabled or not.
External Port Path Cost
Configured value of the external Port Path Cost parame-
ter
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
If 0 (defined as the default CIST ID) is passed as the <mstid>, then this command displays the settings
and parameters for a specific switch port within the common and internal spanning tree. The <unit/
slot/port> is the desired switch port. In this case, the following are displayed.