Field Description
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) Dell#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.
Spanning Tree Protocol (STP) 1563