Command Line Reference Guide

Command History
Version 9.0(1.3) Introduced on the S5000.
Related
Commands
hello-time – changes the time interval between BPDUs.
max-age – changes the wait time before RSTP refreshes the protocol configuration
information.
hello-time
Set the time interval between the generation of the RSTP bridge protocol data units (BPDUs).
S5000
Syntax
hello-time [milli-second] seconds
To return to the default value, use the no hello-time command.
Parameters
seconds
Enter a number as the time interval between transmission of BPDUs.
The range is 1 to 10 seconds. The default is 2 seconds.
milli-second Enter the keywords milli-second to configure a hello time on the
order of milliseconds. The range is 50 to 950 milliseconds
Defaults 2 seconds
Command Modes CONFIGURATION RSTP (conf-rstp)
Command History
Version 9.0(1.3) Introduced on the S5000.
Usage
Information
The hello time is encoded in BPDUs in increments of 1/256ths of a second. The standard
minimum hello time in seconds is 1 second, which is encoded as 256. Millisecond hello times
are encoded using values less than 256; the millisecond hello time equals (x/1000)*256.
When you configure millisecond hellos, the default hello interval of 2 seconds is still used for
edge ports; the millisecond hello interval is not used.
Related
Commands
forward-delay – changes the wait time before RSTP transitions to the Forwarding state.
max-age – changes the wait time before RSTP refreshes the protocol configuration
information.
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