sampling considered for calculating packet loss

[mateusguilherme]

Hello

I created a Performance SLA to monitor the quality of a link to connect to a specific server on the Internet. The measurement uses tcp-connect and makes requests to a specific IP and Port. The defined check interval is 500ms and the time to consider the packet as lost is the default of 500ms.

Let's say I'm having 20% ​​loss, does fortigate calculate this percentage based on the N number of previous packets? Or does it calculate based on the last N minutes? Is it possible to change this?

Update:

Based on some observations, I assume that the percentage of the "Packet Loss" metric is calculated based on the "Failures before inactive" parameter. For example, if I set 10 for "Failures before inactive", Fortigate will consider the last 10 packets for sampling. If 2 of the last 10 packets fail, I will get 20% for the "Packet Loss" metric.

I did not find this information in any official Fortigate documentation, I would like confirmation.

[Atul_S · Accepted solution]

Hi There,

Pls review one of the comment I found in the community page from Khushdeep in the below link. I hope this might help.

https://community.fortinet.com/t5/Support-Forum/quot-Packet-Loss-threshold-quot-option-in-quot-Perfo....

Thanks

[mateusguilherme]

• Packet Loss threshold: Calculated based on last 100 probes (default = 0%).
  
  Thank you very much for your tip.