Configure The Max Transmission Speed On A Port - Huawei Quidway S3500 Series Operation Manual

Operation Manual - STP
Quidway S3500 Series Ethernet Switches
Caution:
The Forward Delay configured on a switch depends on the switching network
diameter. Generally, the Forward Delay is supposed to be longer when the network
diameter is longer. Note that too short a Forward Delay may redistribute some
redundant routes temporarily, while too long a Forward Delay may prolong the
network connection resuming. The default value is recommended.
A suitable Hello Time ensures the switch to detect the link fault on the network but
occupy moderate network resources. The default value is recommended. If you set
too long a Hello Time, when there is packet dropped over a link, the switch may
consider it as link fault and the network device will recalculate the spanning tree
accordingly. However, for too short a Hello Time, the switch frequently sends
configuration BPDU, which adds its burden and wastes the network resources.
Too short a Max Age may cause the network device frequently calculate the
spanning tree and mistake the congestion as link fault. However, if the Max Age is
too long, the network device may not be able to discover the link fault and
recalculate the spanning tree in time, which will weaken the auto-adaptation
capacity of the network. The default value is recommended.
To avoid frequent network flapping, the values of Hello Time, Forward Delay and
Maximum Age should guarantee the following formulas equal.
2 * (forward-delay - 1seconds) >= maximum-age
maximum-age >= 2 * (hello + 1.0 seconds)
You are recommended to use the stp root primary command to specify the network
diameter and Hello Time of the switching network, thus MSTP will automatically
calculate and give the rather desirable values.
By default, Forward Delay is 15 seconds, Hello Time is 2 seconds, and Max Age is 20
seconds.

1.2.8 Configure the Max Transmission Speed on a Port

The max transmission speed on a port specifies how many MSTP packets will be
transmitted every Hello Time via the port.
The max transmission speed on a port is limited by the physical state of the port and the
network structure. You can configure it according the network conditions.
You can configure the max transmission speed on a port in the following ways.
I. Configure in system view
Perform the following configuration in system view.
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Chapter 1 MSTP Region-configuration