The stp transmit-limit command sets the maximum number of BPDUs that the current port can send in a specified period.
The undo stp transmit-limit command restores the default maximum BPDUs.
By default, the maximum number of BPDUs that a port sends is 6 per second.
| Parameter | Description | Value |
|---|---|---|
| packet-number | Specifies the maximum number of BPDUs that a port can send in a specified period. |
The value is an integer that ranges from 1 to 255. |
Ethernet interface view, GE interface view, XGE interface view, MultiGE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, port group view, 25GE interface view
Usage Scenario
On a network where a spanning tree protocol is enabled, a switching device periodically sends BPDUs to other devices in the same spanning tree with the interval of the Hello Time. Sending BPDUs periodically ensures that the spanning tree is stable. If the number of sent BPDUs is great in a specified period, excessive system and bandwidth resources will be consumed.
To prevent this problem from occurring, run the stp transmit-limit command to set the maximum number of BPDUs that can be sent by an interface in a specified period. In this manner, the BPDU sending speed is controlled, preventing excessive use of system and bandwidth resources by MSTP when the network topology flaps.
Precautions
After the stp transmit-limit command is configured, the maximum number of BPDUs sent in a specified period by the interface is determined by the set value.