Fujitsu P3NK-4452-01ENZD Manual De Usuario

XG Series User's Guide

Chapter 5 Command Reference

STP Information

Function

Set a maximum valid time of bridge configuration.

Available Model

XG0224 / XG0448 / XG2600

Syntax

stp age <max_age>

Options

<max_age>
•

Maximum valid time
Specify a valid time of the BPDU information sent from the root bridge within the range 
of 6 to 40 seconds.
The unit will be s (second).

Use Mode

Configuration mode (admin class)

Explanation

Set a valid time for the BPDU that the root bridge sends.
Receiving no BPDU frame from the root bridge within the max age time will lead this 
device to begin sending BPDU as a root bridge.

Caution

<max_age> checks the relationship between the definition values of stp delay 
<delay_time> and stp hello <time>.

•

Check with forward delay time
max age time <= 2 

×

 (forward delay time - 1.0 seconds)

•

Check with hello time
max age time >= 2 

×

 (hello time + 1.0 seconds)

If one or both of the above definition value is invalid, the set values of <max_age>, 
<delay_time>, and <time> will be disabled.
The following shows definition conditions that are available for checking the relationship 
between <max age>, <delay_time>, and <time>.
2 

×

 (forward delay time - 1.0 second) >= max age time >= 2 

×

 (hello time + 1.0 second)

Default

It is assumed that 20 seconds are set for the valid time of the BPDU sent by the root 
bridge.

stp age 20s