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Version Description
8.4.2.1 Support for the optional guard keyword was added on the C-Series, S-Series, and
E-Series.
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 port error disable state (EDS) caused by loopback BPDU
inconsistency and Port VLAN ID inconsistency.
6.2.1.1 Introduced.
Usage
Information
The following describes the show spanning-tree pvst command shown in the following examples.
Field Description
Interface Name PVST interface.
Instance PVST 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 (Brief)
DellEMC# show spanning-tree pvst vlan 3 brief
VLAN 3
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 4096, Address 0001.e801.6aa8
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 16384, Address 0001.e805.e306
Configured hello time 2, max age 20, forward delay 15
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
----------------------------------------------------------
Te 1/0/1 128.130 128 20000 FWD 20000 4096 0001.e801.6aa8 128.426
Te 1/1/1 128.131 128 20000 BLK 20000 4096 0001.e801.6aa8 128.427
Te 1/16/1 128.146 128 20000 FWD 20000 16384 0001.e805.e306 128.146
Te 1/17/1 128.147 128 20000 FWD 20000 16384 0001.e805.e306 128.147
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
-----------------------------------------------------
Te 1/2/1 Root 128.130 128 20000 FWD 20000 P2P No
Te 1/1/1 Altr 128.131 128 20000 BLK 20000 P2P No
Te 1/16/1 Desg 128.146 128 20000 FWD 20000 P2P Yes
Te 1/17/1 Desg 128.147 128 20000 FWD 20000 P2P Yes
Example
DellEMC# show spanning-tree pvst vlan 2
VLAN 2
Root Identifier has priority 4096, Address 0001.e805.e306
Root Bridge hello time 2, max age 20, forward delay 15
Bridge Identifier has priority 4096, Address 0001.e805.e306
Configured hello time 2, max age 20, forward delay 15
We are the root of VLAN 2
Current root has priority 4096, Address 0001.e805.e306
Number of topology changes 3, last change occured 00:57:00
Port 130 (TenGigabitEthernet 1/2/1) is designated Forwarding
Port path cost 20000, Port priority 128, Port Identifier 128.130
Designated root has priority 4096, address 0001.e805.e3:06
Designated bridge has priority 4096, address 0001.e805.e3:06
Designated port id is 128.130, designated path cost 0
Number of transitions to forwarding state 1
BPDU sent 1567, received 3
The port is not in the Edge port mode
1202 Per-VLAN Spanning Tree Plus (PVST+)