Reference Guide

722 | Per-VLAN Spanning Tree Plus (PVST+)
www.dell.com | support.dell.com
Defaults
PVST+ is disabled
Command Modes
CONFIGURATION (conf-pvst)
Command
History
Related
Commands
description
z
Enter a description of the PVST+
Syntax
description {description}
To remove the description, use the no description {description} command.
Parameters
Defaults
No default behavior or values
Command Modes
SPANNING TREE PVST+ (The prompt is “config-pvst”.)
Command
History
Related
Commands
extend system-id
z
Use Extend System ID to augment the Bridge ID with a VLAN ID so that PVST+ differentiate
between BPDUs for each VLAN. If for some reason on VLAN receives a BPDU meant for another
VLAN, PVST+ will then not detect a loop, and both ports can remain in forwarding state.
Syntax
extend system-id
Defaults
Disabled
Command Modes
PROTOCOL PVST
Command
History
Example
FTOS(conf-pvst)#do show spanning-tree pvst vlan 5 brief
Version 9.0.2.0 Introduced on the S6000.
Version 8.3.11.1 Introduced on Z9000.
protocol spanning-tree pvst Enter PVST+ mode.
S6000
description
Enter a description to identify the Spanning Tree (80 characters maximum).
Version 9.0.2.0 Introduced on the S6000.
Version 8.3.11.1 Introduced on Z9000.
protocol spanning-tree pvst Enter SPANNING TREE mode on the switch.
S6000
Version 9.0.2.0 Introduced on the S6000.
Version 8.3.11.1 Introduced on Z9000.