Connectivity Guide

Parameters
instance-number (Optional) Enter the multiple spanning tree instance number. The range is from 0 to
63.
brief (Optional) Enter the keyword brief to view a synopsis of the MST instance.
guard (Optional) Enter the keyword guard to display the type of guard enabled on an
MSTP interface and the current port state.
Command Modes
● EXEC
● EXEC Privilege
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.8(2.0) Introduced on the S3100 series.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.4.2.1 Support for the optional keyword guard was added on the C-Series, S-Series, and
E-Series.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.4.1.0 Expanded to display the port error disable state (EDS) loopback BPDU
inconsistency causes.
Usage
Information
Enable the multiple spanning tree protocol prior to using this command.
Example
Example (EDS
and LBK)
The bold line shows the loopback BPDU inconsistency (LBK_INC).
Usage
Information
The following describes the show spanning-tree msti 5 guard command shown in the following
example.
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)
Multiple Spanning Tree Protocol (MSTP) 935