Dell Force10 Z9000 - Hello-Time; Max-Age

hello-time
Set the time interval between the generation of the RSTP bridge protocol data units (BPDUs).
C-Series, E-Series, S-Series, Z-Series, S4810
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 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 8.3.1.0 Added the milli-second option to the S-Series.
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 on the E-Series.
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.
max-age
Set the time interval for the RSTP bridge to maintain configuration information before refreshing that information.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
max-age seconds
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