|Description||This article discusses a specific packet loss condition triggered when the CPUs of a device are not able to process the volume of incoming traffic from the network adapter (NPU: network Processor unit).|
|Scope||NP7 versus NP6.|
When this happens, the CPU will reach a very high percentage in the softirq category as printed below:
get system performance status
However, this command displays the real-time status of the CPUs, and a transient condition might no longer be visible by using this command.
The persistent information about this condition being triggered is gathered by looking at some counters inside the NPs.
For NP6-based devices, this information is stored in the below counters returned by the following command:
For NP7-based devices, there are 2 ways to get this information:
<DSW drop counters>
Among the various counters printed, if the above counters are incrementing, this is an indication that this packet is matching the loss condition.