Stp Transmit-Limit - HP 12500 Series Command Reference Manual

faulty. If a device does not receive a BPDU from the upstream device within nine times of the hello
time, it assumes that the upstream device has failed and will start a new spanning tree calculation
process.
In a stable network, this kind of spanning tree calculation may occur because the upstream device
is busy. You can avoid such unwanted spanning tree calculations by lengthening the timeout
interval (by setting the timeout factor to 4 or more), thus saving network resources. HP
recommends that you set the timeout factor to 5, 6, or 7 for a stable network.
Examples
# Set the timeout factor of the device to 7.
<Sysname> system-view
[Sysname] stp timer-factor 7
Related commands
stp timer hello

stp transmit-limit

Use stp transmit-limit to set the maximum number of BPDUs that the ports can send within each
hello time.
Use undo stp transmit-limit to restore the default.
Syntax
stp transmit-limit limit
undo stp transmit-limit
Default
The maximum transmission rate of all ports is 10. Each port can send up to 10 BPDUs within each
hello time.
Views
Layer 2 Ethernet interface view, Layer 2 aggregate interface view
Predefined user roles
network-admin
mdc-admin
Parameters
limit: Sets the maximum number of BPDUs the ports can send within each hello time, in the range
of 1 to 255.
Usage guidelines
A larger maximum transmission rate value requires more system resources. An appropriate
maximum transmission rate setting can prevent spanning tree protocols from using excessive
bandwidth resources during network topology changes. HP recommends that you use the default
value.
When the setting is configured in Layer 2 Ethernet interface view, it takes effect on only that
interface.
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