lldp message-transmission delay (AP system profile view)
Function
The lldp message-transmission delay command sets the LLDP packet transmission delay.
The undo lldp message-transmission delay command restores the default LLDP packet transmission delay.
The default LLDP packet transmission delay is 2 seconds.
Parameters
Parameter |
Description |
Value |
|---|---|---|
delay |
Specifies the LLDP packet transmission delay. |
The value is an integer that ranges from 1 to 8192, in seconds. The delay value depends on the parameter interval set by the lldp message-transmission interval command. The delay value must be less than or equal to a quarter of the interval value. |
Usage Guidelines
Usage Scenario
There is a delay before the AP sends an LLDP packet to the neighbor when the device status changes frequently.
If the AP status changes frequently, extend the delay in preventing the AP from frequently sending packets to the neighbors. A delay suppresses the network topology flapping.
Configuration Impact
The LLDP packet transmission delay must be set properly and adjusted according to network loads.
- A large value reduces the LLDP packet transmission frequency when the local device status frequently changes. This helps save system resources. However, if the value is too large, the device cannot notify neighbors of its status in a timely manner, and the NMS cannot discover the network topology changes in real time.
- A small value increases the LLDP packet transmission frequency and enables the NMS to discover network topology changes in real time when the local device status frequently changes. However, if the value is too small, LLDP packets are exchanged frequently. This increases the system load and wastes resources.
- The default value is recommended.
Precautions
- Decreasing the value of delay is not restricted by the value of interval. delay can be any number from 1 to 8192.
- The delay value must be less than or equal to a quarter of the interval value. Therefore, if you want to set delay to be greater than a quarter of interval, first increase the interval value to at least four times the new delay value, and then increase the delay value.
If the interval value is smaller than four times the delay value, the system displays an error message when you run the undo lldp message-transmission delay command. To run the undo lldp message-transmission delay command, increase the interval value to at least four times the delay value first.