Reference Guide

Rapid Spanning Tree Protocol (RSTP) | 1269
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 millisecond hellos are configured, the default hello interval of 2 seconds is still used for edge
ports; the millisecond hello interval is not used.
Related
Commands
max-age
c e s
Set the time interval for the RSTP bridge to maintain configuration information before refreshing that
information.
Syntax
max-age seconds
To return to the default values, enter no max-age.
Parameters
Defaults
20 seconds
Command Modes
CONFIGURATION RSTP (conf-rstp)
Command
History
Related
Commands
forward-delay Change the wait time before RSTP transitions to the Forwarding state.
max-age Change the wait time before RSTP refreshes protocol configuration information.
max-age
Enter a number of seconds the FTOS waits before refreshing configuration information.
Range: 6 to 40 seconds
Default: 20 seconds
Version 7.6.1.0 Support added for S-Series
Version 7.5.1.0 Support added for C-Series
Version 6.2.1.1 Introduced for E-Series
max-age Change the wait time before RSTP transitions to the Forwarding state.
hello-time Change the time interval between BPDUs.