HP VPN Firewall Appliances Network Management Command Reference

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not receive a BPDU from the upstream device within nine times the hello time, it will assume that the
upstream device has failed and start a new spanning tree calculation process.
In a stable network, this kind of spanning tree calculation might occur because the upstream device is
busy. You can avoid such unwanted spanning tree calculations by lengthening the timeout time (by
setting the timeout factor to 4 or more), saving the 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
Ethernet interface view, Layer 2 aggregate interface view
Default command level
2: System level
Parameters
limit: Sets the maximum number of BPDUs the ports can send within each hello time, ranging from 1 to
255.
Usage guidelines
Configured in Ethernet interface view, the setting takes effect only on the interface.
Configured in Layer 2 aggregate interface view, the setting takes effect only on the aggregate interface.
Configured on a member port in an aggregation group, the setting takes effect only after the port leaves
the aggregation group.
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.
Examples
# Set the maximum transmission rate of port GigabitEthernet 0/1 to 5.