Administrator Guide

Version Description
pre- 7.7.1.1 Introduced.
Related
Commands
protocol spanning-tree pvst — enter SPANNING TREE mode on the switch.
disable
Disable PVST+ globally.
Z9000
Syntax
disable
To enable PVST+, use the no disable command.
Defaults Disabled.
Command Modes CONFIGURATION (conf-pvst)
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
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.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
pre- 6.2.1.1 Introduced on the E-Series.
Related
Commands
protocol spanning-tree pvst — enter PVST+ mode.
extend system-id
To augment the Bridge ID with a VLAN ID so that PVST+ differentiate between BPDUs for each VLAN, use extend system ID.
If the VLAN receives a BPDU meant for another VLAN, PVST+ does not detect a loop, and both ports can remain in Forwarding
state.
Z9000
Syntax
extend system-id
Defaults Disabled
Command Modes PROTOCOL PVST
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
986 Per-VLAN Spanning Tree Plus (PVST+)