Dell Command Line Reference Guide for the S4048–ON System 9.14.2.6

To return to the default value, use the no hello-time command.

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

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.

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.

• 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.