Operation Manual - STP
Quidway S3000 Series Ethernet Switches Chapter 1 RSTP Configuration
2-18
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.
2.2.8 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.
Table2-10 Configure the max transmission speed on a port
Operation Command
Configure the max transmission speed on a port.
stp interface interface-list transit-limit
packetnum
Restore the max transmission speed on a port. undo stp interface interface-list transit-limit
II. Configure in Ethernet port view
Perform the following configuration in Ethernet port view.
Table2-11 Configure the max transmission speed on a port
Operation Command
Configure the max transmission speed on a port. stp transit-limit packetnum
Restore the max transmission speed on a port. undo stp transit-limit
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