HP E4510-48G, Command Reference Manual

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View
System view
Default Level
2: System level
Parameters
factor : Timeout factor, in the range of 1 to 20.
Description
Use the stp timer-factor command to set the timeout factor, which decides the timeout time. Timeout
time = timeout factor × 3 × hello time.
Use the undo stp timer-factor command to restore the default.
By default, the timeout factor is 3.
Note that:
z
After the network topology is stabilized, each non-root-bridge device forwards configuration
BPDUs to the surrounding devices at the interval of hello time to check whether any link is faulty.
Typically, if a device does 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.
z
In a very stable network, this kind of spanning tree calculation may occur because the upstream
device is busy. In this case, you can avoid such unwanted spanning tree calculations by
lengthening the timeout time, thus saving the network resources. We recommend that you set the
timeout factor to 5, or 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
stp transmit-limit
Syntax
stp transmit-limit limit
undo stp transmit-limit
View
Ethernet interface view, port group view, Layer 2 aggregate interface view
Default Level
2: System level
Parameters
limit : Maximum number of BPDUs the port(s) can send within each hello time, in the range of 1 to 255.