Reference Guide

Parameters
brief (OPTIONAL) Enter the keyword brief to view a synopsis of the
RSTP configuration information.
guard (OPTIONAL) Enter the keyword guard to display the type of guard
enabled on an RSTP interface and the current port state.
Command Modes
• EXEC
• EXEC Privilege
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.4.2.1 Added support for the optional guard keyword on the C-Series, S-
Series, and E-Series TeraScale.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
Version 6.4.1.0 Expanded to display the port error disable state (EDS) caused by
loopback BPDU inconsistency.
Version 6.2.1.1 Introduced on the E-Series.
Usage
Information
The following describes the show spanning-tree rstp guard command shown in
the Example below.
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 Type of STP guard configured (Root, Loop, or BPDU guard)
Example (Brief)
FTOS#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
---------- ------- --- ------- -------------------- --------
Gi 4/0 128.418 128 20000 FWD 20000 16384 0001.e801.6aa8 128.418
Gi 4/1 128.419 128 20000 FWD 20000 16384 0001.e801.6aa8 128.419
Gi 4/8 128.426 128 20000 FWD 20000 8192 0001.e805.e306 128.130
Gi 4/9 128.427 128 20000 BLK 20000 8192 0001.e805.e306 128.131
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
----------- ---- ------- --- ------- --------- ----
1416