CLI Guide

Field Description
Interface Name STP interface.
Instance STP 0 instance.
Sts Port state: root-inconsistent (INCON Root), forwarding (FWD), listening (LIS),
blocking (BLK), or shut down (EDS Shut).
Guard Type Type of STP guard configured (Root, Loop, or BPDU guard).
Example (Guard)
DellEMC#show spanning-tree 0 guard
Interface
Name Instance Sts Guard type
-------- -------- --------- ----------
Te 1/1 0 INCON(Root) Rootguard
Te 1/2 0 LIS Loopguard
Te 1/3 0 EDS (Shut) Bpduguard
spanning-tree
Assigns a Layer 2 interface to STP instance 0 and configures a port cost or port priority, or enables loop guard, root guard, or
the Portfast feature on the interface.
Syntax
spanning-tree stp-id {cost cost | {loopguard | rootguard} | portfast
[bpduguard [shutdown-on-violation]] | priority priority}
To disable Spanning Tree group on an interface, use the no spanning-tree stp-id {cost cost
| {loopguard | rootguard} | portfast [bpduguard [shutdown-on-violation]] |
priority priority} command.
Parameters
stp-id Enter the STP instance ID. The range is 0.
cost cost Enter the keyword cost then a number as the cost. The range is from 1 to 65535.
The defaults are:
● 1-Gigabit Ethernet interface = 4.
● 10-Gigabit Ethernet interface = 2.
● Port Channel interface with 100 Mb/s Ethernet = 18.
● Port Channel interface with 1 Gigabit Ethernet = 3.
● Port Channel interface with 10 Gigabit Ethernet = 1.
loopguard Enter the keyword loopguard to enable STP loop guard on a port or port-channel
interface.
rootguard Enter the keyword rootguard to enable STP root guard on a port or port-channel
interface.
portfast
[bpduguard
[shutdown-on-
viol ation]]
Enter the keyword portfast to enable Portfast to move the interface into
Forwarding mode immediately after the root fails.
Enter the optional keyword bpduguard to disable the port when it receives a
BPDU.
Enter the optional keyword shutdown-on-violation to hardware disable an
interface when a BPDU is received and the port is disabled.
priority priority Enter keyword priority then a number as the priority. The range is from zero
(0) to 15. The default is 8.
Defaults cost = depends on the interface type; priority = 8
Command Modes INTERFACE
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
1538 Spanning Tree Protocol (STP)