Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

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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)

Supported Modes

Full–Switch

Command History

Version	Description
9.9(0.0)	Introduced on the FN IOM.
8.3.16.1	Introduced on the MXL 10/40GbE Switch IO Module.

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.