Administrator Guide

Related
Commands
vlan forward-delay — changes the time interval before the system transitions to the Forwarding state.
vlan hello-time — change the time interval between BPDUs.
vlan max-age — changes the time interval before PVST+ refreshes.
show spanning-tree pvst — displays the PVST+ configuration.
vlan forward-delay
Set the amount of time the interface waits in the Listening state and the Learning state before transitioning to the Forwarding state.
C9000 Series
Syntax
vlan vlan-range forward-delay seconds
To return to the default setting, use the no vlan forward-delay command.
Parameters
vlan vlan-range Enter the keyword vlan then the VLAN numbers. The range is from 1 to 4094.
forward-delay
seconds
Enter the keywords forward-delay then the time interval, in seconds, that the system
waits before transitioning PVST+ to the forwarding state. The range is from 4 to 30
seconds. The default is 15 seconds.
Defaults 15 seconds
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
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
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.
6.2.1.1 Introduced.
Related
Commands
vlan bridge-priority — sets the bridge-priority value.
vlan hello-time — changes the time interval between BPDUs.
vlan max-age — changes the time interval before PVST+ refreshes.
show spanning-tree pvst — displays the PVST+ configuration.
vlan hello-time
Set the time interval between generation of PVST+ 7 BPDUs.
C9000 Series
Syntax
vlan vlan-range hello-time seconds
1236 Per-VLAN Spanning Tree Plus (PVST+)