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STP Timers hello timer, forward delay timer, max age timer and their default values

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Important Spanning Tree Protocol (STP) timers are hello timer, forward delay timer and max age timer and their default values are listed below.

hello timer

The hello timer is the time interval between each Bridge Protocol Data Unit (BPDU) that is sent on a port. Defaut Spanning Tree Protocol (STP) hello timer is 2 seconds. You can adjust Spanning Tree Protocol (STP) hello timer to any value between 1 and 10 sec.

Click the following link to learn how to change the default Spanning Tree Protocol (STP) hello timer.

forward delay timer

The forward delay timer is the time interval that is spent in the listening and learning state. Default Spanning Tree Protocol (STP) forward delay timer is 15 seconds. You can adjust the Spanning Tree Protocol (STP) forward delay timer to any value between 4 and 30 seconds.

max age timer

The max age timer controls the maximum length of time interval that a Spanning Tree Protocol (STP) Switch port saves its configuration Bridge Protocol Data Unit (BPDU) information. Default max age timer is 20 seconds. You can tune the Spanning Tree Protocol (STP) max age timer to any value between 6 and 40 sec.

              Jajish Thomason Google+
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