R21xx-HP FlexFabric 11900 Layer 2 LAN Switching Command Reference

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protocols automatically calculate the optimal settings for the forward delay timer. If the network diameter
uses the default value, the forward delay timer also uses the default value.
Examples
# In MSTP mode, set the forward delay timer to 2000 centiseconds.
<Sysname> system-view
[Sysname] stp timer forward-delay 2000
Related commands
• stp bridge-diameter
• stp timer hello
• stp timer max-age
stp timer hello
Use stp timer hello to set the hello time of the device.
Use undo stp timer hello to restore the default.
Syntax
stp timer hello time
undo stp timer hello
Default
The hello time is 200 centiseconds.
Views
System view
Predefined user roles
network-admin
Parameters
time: Sets the hello time in centiseconds. The value range is 100 to 1000 in increments of 100 (as in 100,
200, 300).
Usage guidelines
Hello time is the time interval at which spanning tree devices send configuration BPDUs to maintain the
spanning tree. If a device fails to receive configuration BPDUs within the set period of time, a new
spanning tree calculation process is triggered due to timeout.
HP recommends not setting the hello time with this command. Instead, you can specify the network
diameter of the switched network by using the stp bridge-diameter command and let the spanning tree
protocols automatically calculate the optimal settings for the hello timer. If the network diameter uses the
default value, the hello timer also uses the default value.
Examples
# In MSTP mode, set the hello time to 400 centiseconds.
<Sysname> system-view
[Sysname] stp timer hello 400
Related commands
• stp bridge-diameter