Specifications

show spanning-tree
239
Item Meaning Displayed information
bridge
Hello Time Interval for sending
BPDUs sent from the root
bridge
Interval for sending BPDUs that are regularly sent from
the root bridge
Forward Delay Time required for a state
transition of the root
bridge port
Time required for a state transition when the state
transition in the root bridge is triggered by the timer
Port Port number or channel
group number
The number of the port for which information is
displayed or the channel group number
Up The port is in Up status. Indicates that the port is in Up status.
If link aggregation is used, this means that the channel
group is in Up status.
Down The port is in Down
status.
Indicates that the port is in Down status.
If link aggregation is used, this means that the channel
group is in Down status.
Status Port state If Mode is STP:
Blocking: Blocking
Listening: Listening
Learning: Learning
Forwarding: Indicates Forwarding status.
Disabled: Disabled. This status is displayed when
the port is in the Down status.
Disabled(unavailable): Disabled. Single
Spanning Tree cannot be used because PVST+ is
enabled for the port.
If Mode is Rapid STP:
Discarding: Discarding
Learning: Learning
Forwarding: Indicates Forwarding status.
Disabled: Disabled. This status is displayed when
the port is in the Down status.
Disabled(unavailable): Disabled. Single
Spanning Tree cannot be used because PVST+ is
enabled for the port.
Role The role of the port Root: Root port
Designated: Designated port
Alternate: Alternate port
Backup: Backup port
If the port is in the Down status, a hyphen (-) is
displayed, because ports in this status are not included
in the topology calculations.
These parameters are used by both STP and Rapid
STP.
Priority Port priority Value set for the priority of the port on the Switch
If the port is in the Down status, a hyphen (-) is
displayed.