Administrator Guide

Command Modes
• EXEC
• EXEC Privilege
Command History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.4.2.1 Added support for the optional guard keyword on the C-Series, S-Series, and E-Series
TeraScale.
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) caused by loopback BPDU
inconsistency.
6.2.1.1 Introduced on the E-Series.
Usage Information The following describes the show spanning-tree rstp guard command shown in the following example.
Field Description
Interface Name RSTP interface.
Instance RSTP instance.
Sts Port state: root-inconsistent (INCON Root), forwarding (FWD), listening (LIS), blocking
(BLK), disabled (DIS), or shut down (EDS Shut).
Guard Type Types of STP guard configured (Root, Loop, or BPDU guard)
Example (Brief)
Dell#show spanning-tree rstp brief
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 8192, Address 0001.e805.e306
Root Bridge hello time 4, max age 20, forward delay 15
Bridge ID Priority 16384, Address 0001.e801.6aa8
Configured hello time 2, max age 20, forward delay 15
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
---------- ------- --- ------- -------------------- --------
Te 2/0 128.418 128 20000 FWD 20000 16384 0001.e801.6aa8 128.418
Te 2/1 128.419 128 20000 FWD 20000 16384 0001.e801.6aa8 128.419
Te 2/8 128.426 128 20000 FWD 20000 8192 0001.e805.e306 128.130
Te 2/9 128.427 128 20000 BLK 20000 8192 0001.e805.e306 128.131
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
----------- ---- ------- --- ------- --------- ----
Te 2/0 Desg 128.418 128 20000 FWD 20000 P2P Yes
Te 2/1 Desg 128.419 128 20000 FWD 20000 P2P Yes
Te 2/8 Root 128.426 128 20000 FWD 20000 P2P No
Te 2/9 Altr 128.427 128 20000 BLK 20000 P2P No
Dell#
1404 Rapid Spanning Tree Protocol (RSTP)