This command is used to display information about the state of Spanning Tree Protocol (STP).

Syntax  stp-state-show

vlan vlan-id

The VLAN identifier for the STP instance.

ports port-list

The STP ports.

instance-id instance-id-number 

The STP instance ID.

name name-string

The name of the Spanning Tree Group (STG) for the STP instance.

bridge-id mac-address

The MAC address of the bridge switch.

bridge-priority bridge-priority-

The priority for the bridge switch.

root-id mac-address

The MAC address of the root switch.

root-priority root-priority-number

The priority for the root switch.

root-port root-port-number

The root port for STP.

root-port(peer) root-port(peer)-number

The peer root port for STP.

hello-time hello-time-number

The interval, in seconds, between the generation of configuration messages by the root switch.

forwarding-delay forwarding-delay-

The number of seconds that the interface waits before changing from its spanning-tree learning, and listening states to the forwarding state.

max-age max-age-number]

The amount of time that the switch stores protocol information received on an interface.


Specifies if it is an internal port.


Specifies if it is a peer port or not.

Defaults   None.

Access   CLI


Version 1.2

Command introduced.

Version 2.2

The parameter blocking, removed, and edge, designated, alternate, backup, vlag-mirror, internal, and peer added to support RSTP.

Version 2.2.6

The parameter root-port(peer) added.

Version 2.3

The following parameters are deprecated:

• disabled

• learning

• forwarding

• discarding

• edge

• designated

• alternate

• backup

• vlag-mirror

Version 2.3.1

The parameter ports added.

Version 2.4.1

The parameter instance-id added.

Usage   STP is a standard inter-switch protocol is used to ensure that an ad hoc network topology is loop-free at Layer 2, on a per VLAN basis. If your network connections form loops, and STP is disabled, packets recirculate between the switches, and causes a decrease in network performance. If you are certain that your network is loop-free, you do not need to enable STP. One drawback of STP is that it does not allow for Layer 2 multipathing, and may result in suboptimal utilization of available network links. Therefore, a fabric of Pluribus Networks switches does not use STP within the boundaries of the fabric. The use of STP is recommended for ad hoc networks that interoperate in a heterogeneous, multi-vendor switch environment. Use this command to enable or disable STP on the network.

Examples  To display STP information, use the following command:

CLI (network-admin@switch) > stp-state-show

switch:           pleiades25

vlan:             1

name:             stg-default-stg

bridge-id:        64:0e:94:18:00:8f

bridge-priority:  32769

root-id:          64:0e:94:18:00:8f

root-priority:    32769

root-port:        0

hello-time:       2

forwarding-delay: 15

max-age:          20

disabled:         none

learning:         none

forwarding:       12,56,65-66,255

discarding:       none

edge:             65-66

designated:       12,56,65-66,255

alternate:        none

backup:           none

vlag-mirror:      none