Command
Modes • EXEC
• EXEC Privilege
Command
History Version Description
9.7(0.0) Introduced on the S6000-ON.
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 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 4/2 128.418 128 20000 FWD 20000 16384 0001.e801.6aa8 128.418
Te 4/1 128.419 128 20000 FWD 20000 16384 0001.e801.6aa8 128.419
Te 4/8 128.426 128 20000 FWD 20000 8192 0001.e805.e306 128.130
Te 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
----------- ---- ------- --- ------- --------- ----
Te 4/2 Desg 128.418 128 20000 FWD 20000 P2P Yes
Rapid Spanning Tree Protocol (RSTP) 1567