Forward Delay(S) (Spanning Tree) - Huawei OptiX OSN 550 Configuration Manual

7 List of Parameters
Values
Value Range
1-10
Configuration Guidelines
When you set the value of this parameter, ensure that the following requirement is met:
2 x (Hello Time + 1) ≤ Max Age ≤ 2 x (Forward Delay - 1)
Relationship with Other Parameters
This parameter is related to the Max Age and Forward Delay parameters. For details, refer to
the principles for setting these parameters.

7.73 Forward Delay(s) (Spanning Tree)

Description
The Forward Delay(s) parameter specifies the delay of the port state migration.
This parameter is actually a timer that is used by the ports in the listening state and in the learning
state to control the migration from the listening state to the learning state and the migration from
the learning state to the forwarding state. The timer is started when the port enters the listening
state. When the timer expires, the port automatically migrates to the learning state and the timer
is started again. When the timer expires the second time, the port automatically migrates to the
forwarding state and the timer is stopped.
Impact on the System
The restoration time of the service from the learning state to the forwarding state is affected.
Values
Value Range
4-30
Configuration Guidelines
When you set the value of this parameter, ensure that the following requirement is met:
2 x (Hello Time + 1) ≤ Max Age ≤ 2 x (Forward Delay - 1).
Relationship with Other Parameters
This parameter is related to the Hello Time and Max Age parameters. For details, refer to the
principles for setting these parameters.
7-62
OptiX OSN 550 Multi-Service CPE Optical Transmission
Default Value
2
Default Value
15
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Issue 02 (2011-06-30)