Stp Timer Hello - H3C S7500E Series Command Reference Manual

Parameters
time: Forward delay in centiseconds, ranging from 400 to 3000 at the step of 100.
Description
Use the stp timer forward-delay command to set the forward delay timer of the device.
Use the undo stp timer forward-delay command to restore the system default.
By default, the forward delay timer is set to 1,500 centiseconds.
The forward delay timer set on the root bridge determines the time interval of state transition. To
prevent temporary loops, a port must go through an intermediate state, the learning state, before it
transitions from the discarding state to the forwarding state, and must wait a certain period of time
(forward delay) before it transitions from one state to another to keep synchronized with the remote
device during state transition.
Generally, H3C does not recommend you to set the forward delay by using this command. Instead, you
can use the stp bridge-diameter command to set the network diameter, and then the network will
automatically adjust the forward delay according to the network size. When the network diameter is the
default value, the forward delay is also set to the default.
Related commands: stp timer hello, stp timer max-age, and stp bridge-diameter.
Examples
# Set the forward delay timer of the device to 2,000 centiseconds.
<Sysname> system-view
[Sysname] stp timer forward-delay 2000

stp timer hello

Syntax
stp timer hello time
undo stp timer hello
View
System view
Default Level
2: System level
Parameters
time: Hello time in centiseconds, ranging from 100 to 1000 at the step of 100.
Description
Use the stp timer hello command to set the hello time of the device.
Use the undo stp timer hello command to restore the system default.
By default, the hello time is set to 200 centiseconds.
The hello time is used to detect link failures. STP sends configuration BPDUs at the interval of hello
time. If a device fails to receive configuration BPDUs within the hello time, a new spanning tree
calculation process will be triggered because of configuration BPDU timeout.
Generally, H3C does not recommend you to set the hello time by using this command. Instead, you
can use the stp bridge-diameter command to set the network diameter, and then the network will
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