Spanning Tree Protocol (STP) Commands 49
2 Switching Commands
CST Regional Root Bridge Identifier of the CST Regional Root. It is made up using the
bridge priority and the base MAC address of the bridge.
Regional Root Path Cost Path Cost to the CST Regional Root.
Associated FIDs List of forwarding database identifiers currently associated with this
instance.
Associated VLANs List of VLAN IDs currently associated with this instance.
show spanning-tree brief
This command displays spanning tree settings for the bridge. The following information
appears.
Format
show spanning-tree brief
Modes Privileged EXEC
User EXEC
Bridge Priority Configured value.
Bridge Identifier The bridge identifier for the selected MST instance. It is made up using the
bridge priority and the base MAC address of the bridge.
Bridge Max Age Configured value.
Bridge Max Hops Bridge max-hops count for the device.
Bridge Hello Time Configured value.
Bridge Forward Delay Configured value.
Bridge Hold Time Minimum time between transmission of Configuration Bridge Protocol
Data Units (BPDUs)
show spanning-tree interface
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. The
following details are displayed on execution of the command.
Format
show spanning-tree interface <slot/port>
Modes Privileged EXEC
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.
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