show spanning-tree interface

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. Instead of unit/slot/port, lag lag-intf-num can be used as an alternate way to specify the LAG interface. lag lag-intf-num can also be used to specify the LAG interface where lag-intf-num is the LAG port number. The following details are displayed on execution of the command.

Format	show spanning-tree interface unit/slot/port\|lag lag-intf-num
Mode	Privileged EXEC User EXEC

Column

Meaning

Hello Time	Admin hello time for this port.
Port Mode	Enabled or disabled.
BPDU Guard Effect	Enabled or disabled.
Root Guard	Enabled or disabled.
Loop Guard	Enabled or disabled.
TCN Guard	Enable or disable the propagation of received topology change notifications and topology changes to other ports.
BPDU Filter Mode	Enabled or disabled.
BPDU Flood Mode	Enabled or disabled.
Auto Edge	To enable or disable the feature that causes a port that has not seen a BPDU for edge delay time, to become an edge port and transition to forwarding faster.
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.
RSTP BPDUs Transmitted	Rapid Spanning Tree Protocol Bridge Protocol Data Units sent.
RSTP BPDUs Received	Rapid Spanning Tree Protocol Bridge Protocol Data Units received.
MSTP BPDUs Transmitted	MSTP (Multiple Spanning Tree Protocol) Bridge Protocol Data Units sent.
MSTP BPDUs Received	Multiple Spanning Tree Protocol Bridge Protocol Data Units received.

The following example shows CLI display output for the command.

(Extreme 220) (Routing) #show spanning-tree interface 0/1
Hello Time..................................... Not Configured
Port Mode...................................... Enabled
BPDU Guard Effect.............................. Disabled
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
BPDU Filter Mode............................... Disabled
BPDU Flood Mode................................ Disabled
Auto Edge...................................... TRUE
Port Up Time Since Counters Last Cleared....... 8 day 3 hr 39 min 58 sec
STP BPDUs Transmitted.......................... 0
STP BPDUs Received............................. 0
RSTP BPDUs Transmitted......................... 0
RSTP BPDUs Received............................ 0
MSTP BPDUs Transmitted......................... 0
MSTP BPDUs Received............................ 0
(Extreme 220) (Routing) #

The following example shows CLI display output for the command.

(Extreme 220) (Routing) #show spanning-tree interface lag 1
Hello Time..................................... Not Configured
Port Mode...................................... Enabled
BPDU Guard Effect.............................. Disabled
Root Guard..................................... FALSE
Loop Guard..................................... FALSE
TCN Guard...................................... FALSE
BPDU Filter Mode............................... Disabled
BPDU Flood Mode................................ Disabled
Auto Edge...................................... TRUE
Port Up Time Since Counters Last Cleared....... 8 day 3 hr 42 min 5 sec
STP BPDUs Transmitted.......................... 0
STP BPDUs Received............................. 0
RSTP BPDUs Transmitted......................... 0
RSTP BPDUs Received............................ 0
MSTP BPDUs Transmitted......................... 0
MSTP BPDUs Received............................ 0
(Extreme 220) (Routing) #

Published February 2019prev | next

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