Reference Guide

Per-VLAN Spanning Tree Plus (PVST+) | 1203
Usage
Information
By default FTOS implements an optimized flush mechanism for PVST+. This helps
in flushing the MAC addresses only when necessary (and less often) allowing for
faster convergence during topology changes. However, if a standards-based flush
mechanism is needed, this knob command can be turned on to enable flushing MAC
addresses upon receiving every topology change notification.
vlan bridge-priority
c e s
Set the PVST+ bridge-priority for a VLAN or a set of VLANs.
Syntax
vlan vlan-range bridge-priority value
To return to the default value, enter no vlan bridge-priority command.
Parameters
Defaults
32768
Command Modes
CONFIGURATION (conf-pvst)
Command
History
Related
Commands
Version 7.5.1.0 Support added for C-Series
Version 6.5.1.0 Introduced
vlan vlan-range
Enter the keyword vlan followed by the VLAN number(s).
Range: 1 to 4094
bridge-priority value
Enter the keyword bridge-priority followed by the bridge priority
value in increments of 4096.
Range: 0 to 61440
Default: 32768
version 8.3.19.0 Introduced on S4820T
Version 8.3.7.0 Introduced on S4810
Version 7.6.1.0 Support added for S-Series
Version 7.5.1.0 Support added for C-Series
Version 6.2.1.1 Introduced
vlan forward-delay Change the time interval before FTOS transitions to the forwarding
state
vlan hello-time Change the time interval between BPDUs
vlan max-age Change the time interval before PVST+ refreshes
show spanning-tree pvst Display the PVST+ configuration