H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 193)

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Configuring the Timeout Time Factor
When the network topology is stable, a non-root-bridge device regularly forwards BPDUs received from
the root bridge to its neighboring devices at the interval specified by the hello time parameter to check
link failures. Normally, a device regards its upstream device faulty if the former does not receive any
BPDU from the latter in a period three times of the hello time and then initiates the spanning tree
recalculation process.
Spanning trees may be recalculated even in a steady network if an upstream device continues to be
busy. You can configure the timeout time factor to a larger number to avoid such cases. Normally, the
timeout time can be four or more times of the hello time. For a steady network, the timeout time can be
five to seven times of the hello time.
Configuration procedure
Follow these steps to configure the timeout time factor:
To do… Use the command… Remarks
Enter system view system-view —
Configure the timeout time factor
for the device
stp timer-factor number
Required
The timeout time factor defaults to
3.
For a steady network, the timeout time can be five to seven times of the hello time.
Configuration example
# Configure the timeout time factor to be 6.
system-view
[device] stp timer-factor 6
Configuring the Maximum Transmitting Speed on the Current Port
The maximum transmitting speed of a port specifies the maximum number of configuration BPDUs a
port can transmit in a period specified by the hello time parameter. It depends on the physical state of
the port and network structure. You can configure this parameter according to the network.
Configure the maximum transmitting speed for specified ports in system view
Follow these steps to configure the maximum transmitting speed for specified ports in system view:
To do… Use the command… Remarks
Enter system view system-view —
Configure the maximum
transmitting speed for specified
ports
stp interface interface-list
transmit-limit packetnum
Required
The maximum transmitting speed
of all Ethernet ports on a device
defaults to 10.
Configure the maximum transmitting speed in Ethernet port view
Follow these steps to configure the maximum transmitting speed in Ethernet port view:
To do… Use the command… Remarks
Enter system view system-view —