Reference Guide
Version 7.5.1.0 Introduced on the C-Series.
Version 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.
S4820T
Syntax
vlan vlan-range hello-time seconds
To return to the default value, use the no vlan hello-time command.
Parameters
vlan 
vlan-range
Enter the keyword vlan then the VLAN numbers. The range is from 1 
to 4094.
hello-time 
seconds
Enter the keywords hello-time then the time interval, in seconds, 
between transmission of BPDUs. The range is from 1 to 10 seconds. 
The default is 2 seconds.
Defaults 2 seconds
Command Modes CONFIGURATION (conf-pvst)
Command History
This guide is platform-specific. For command information about other platforms, refer to the 
relevant 
FTOS Command Line Reference Guide
.
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
Version 6.2.1.1 Introduced.
Related 
Commands
vlan bridge-priority — sets the bridge-priority value.
vlan forward-delay — changes the time interval before FTOS transitions to the forwarding 
state.
vlan max-age — changes the time interval before PVST+ refreshes.
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