Command Line Reference Guide

Per-VLAN Spanning Tree plus (PVST+) | 1109
tc-flush-standard
c e s
Enable the MAC address flushing upon receiving every topology change notification.
Syntax
tc-flush-standard
To disable, use the no tc-flush-standard command.
Defaults
Disabled
Command Modes
CONFIGURATION
Command
History
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 7.6.1.0 Support added for S-Series
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 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