Dell Command Line Reference Guide for the S4048–ON System 9.14.2.4

PDF

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 configure 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-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100-ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100-ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Introduced on the S6000-ON.
9.2(1.0)
Introduced on the Z9500.
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 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.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\