Users Guide
hello-time
Set the time interval between the generation of the RSTP bridge protocol data units (BPDUs).
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
from 1 to 10 seconds. The default is 2 seconds.
milli-second Enter the keywords milli-second to congure a hello time on the order of
milliseconds. The range is from 50 to 950 milliseconds
Defaults 2 seconds
Command Modes CONFIGURATION RSTP (conf-rstp)
Command History
This guide is platform-specic. 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
9.7(0.0) Introduced on the S6000-ON.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.3.1.0 Added the milli-second option to the S-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
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 congure 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 conguration information.
1306
Rapid Spanning Tree Protocol (RSTP)