Dell Command Line Reference Guide for the S4048–ON System 9.14.2.5

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show spanning-tree pvst

View the Per-VLAN spanning tree configuration.

S4048

Syntax
show spanning-tree pvst [vlan vlan-id] [brief] [guard]
Parameters
vlan vlan-id
(OPTIONAL) Enter the keyword vlan then the VLAN ID. The range is 1 to 4094.
brief
(OPTIONAL) Enter the keyword brief to view a synopsis of the PVST+ configuration information.
interface
(OPTIONAL) Enter one of the interface keywords along with the slot/port information:
  • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port[/subport] information.
  • For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information.
  • For a Port Channel interface, enter the keyword port-channel then a number:
guard
(OPTIONAL) Enter the keyword guard to display the type of guard enabled on a PVST interface and the current port state.
Defaults
none
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.
9.10(0.0)
Introduced on the S6100-ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100-ON.
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.
8.3.7.0
Introduced on the S4810.
8.5.1.0
Added support for 4-port 40G line cards on the E-Series.
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  128.130 128 20000 FWD 20000 4096 0001.e801.6aa8  128.426
Te 1/1  128.131 128 20000 BLK 20000 4096 0001.e801.6aa8  128.427
Te 1/16 128.146 128 20000 FWD 20000 16384 0001.e805.e306 128.146
Te 1/17 128.147 128 20000 FWD 20000 16384 0001.e805.e306 128.147

Interface
Name    Role PortID   Prio Cost  Sts Cost Link-type Edge
-----------------------------------------------------
Te 1/0  Root 128.130  128  20000 FWD 20000 P2P      No
Te 1/1  Altr 128.131  128  20000 BLK 20000 P2P      No
Te 1/16 Desg 128.146  128  20000 FWD 20000 P2P      Yes
Te 1/17 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 1/4) 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

Port 131 (TenGigabitEthernet 1/1) is designated Forwarding
Port path cost 20000, Port priority 128, Port Identifier 128.131
Designated root has priority 4096, address 0001.e805.e3:06
Designated bridge has priority 4096, address 0001.e805.e3:06
Designated port id is 128.131, designated path cost 0
Number of transitions to forwarding state 1
BPDU sent 1567, received 0
The port is not in the Edge port mode

Port 146 (TenGigabitEthernet 1/16) is designated Forwarding
Port path cost 20000, Port priority 128, Port Identifier 128.146
Designated root has priority 4096, address 0001.e805.e3:06
Designated bridge has priority 4096, address 0001.e805.e3:06
Designated port id is 128.146, designated path cost 0
Number of transitions to forwarding state 1
BPDU sent 1578, received 0
The port is in the Edge port mode

Port 147 (TenGigabitEthernet 1/17) is designated Forwarding
Port path cost 20000, Port priority 128, Port Identifier 128.147
Designated root has priority 4096, address 0001.e805.e3:06
Designated bridge has priority 4096, address 0001.e805.e3:06
Designated port id is 128.147, designated path cost 0
Number of transitions to forwarding state 1
BPDU sent 1579, received 0
The port is in the Edge port mode
DellEMC#
Example (EDS/LBK)
DellEMC# show spanning-tree pvst vlan 2 interface tengigabitethernet 1/1

TenGigabitEthernet 1/1 of VLAN 2 is LBK_INC discarding

Edge port:no (default) port guard :none (default)
Link type: point-to-point (auto) bpdu filter:disable (default)
Bpdu guard :disable (default)
Bpdus sent 152, received 27562

Interface Designated
Name    PortID   Prio Cost  Sts Cost Bridge ID       PortID
-----------------------------------------------------------
Te 1/1  128.1223 128  20000 EDS 0 32768 0001.e800.a12b 128.1223
DellEMC#
Example (EDS/PVID)
DellEMC# show spanning-tree pvst vlan 2 interface tengigabitethernet 1/1

TenGigabitEthernet 1/1 of VLAN 2 is PVID_INC discarding

Edge port:no (default) port guard :none (default)
Link type: point-to-point (auto) bpdu filter:disable (default)
Bpdu guard :disable (default)
Bpdus sent 1, received 0

Interface Designated
Name   PortID   Prio Cost  Sts Cost Bridge ID       PortID
---------------------------------------------------------
Te 1/1 128.1223 128 20000 EDS 0 32768 0001.e800.a12b 128.1223
DellEMC#
Example (Guard)
DellEMC# show spanning-tree pvst vlan 5 guard
Interface
Name   Instance Sts        Guard type
-----------------------------------
Te 1/1 5       INCON(Root) Rootguard
Te 1/2 5       FWD         Loopguard
Te 1/3 5       EDS(Shut)   Bpduguard
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