Reference Guide

CIST external path cost 0
Number of topology changes 1, last change occured 00:00:15 ago
on Te 0/0
Port 257 (TenGigabitEthernet 0/0) is LBK_INC Discarding
Port path cost 20000, Port priority 128, Port Identifier
128.257
Designated root has priority 32768, address 0001.e801.6aa8
Designated bridge has priority 32768, address 0001.e801.6aa8
Designated port id is 128.257, designated path cost 0
Number of transitions to forwarding state 1
BPDU (MRecords): sent 21, received 9
The port is not in the Edge port mode
Usage
Information
The following describes output for the show spanning-tree msti 5 guard
command shown in the Example below.
Field Description
Interface Name MSTP interface.
Instance MSTP 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 msti 5 guard
Interface
Name Instance Sts Guard type
------------------------------------
Te 0/1 5 INCON(Root) Rootguard
Te 0/2 5 FWD Loopguard
Te 0/3 5 EDS(Shut) Bpduguard
spanning-tree
Enable the multiple spanning tree protocol on the interface.
S5000
Syntax
spanning-tree
To disable the multiple spanning tree protocol on the interface, use the no
spanning-tree command.
Parameters
spanning-tree Enter the keywords spanning-tree to enable the MSTP on
the interface.
Defaults Enable.
Multiple Spanning Tree Protocol (MSTP)
935