Submit a ticketCall us

Announcing NPM 12.2
With NPM 12.2 you can monitor your Cisco ASA firewalls, to monitor VPN tunnels for basic visibility and troubleshooting tunnels. NPM 12.2 also uses the SolarWinds Orion Installer so you can easily install and upgrade one or more Orion Platform products simultaneously.
See new features and improvements.

Home > Success Center > VoIP & Network Quality Manager (VNQM) > How to calculate packet loss in IP SLA VoIP Jitter operations

How to calculate packet loss in IP SLA VoIP Jitter operations

Table of contents
Created by Melanie Boyd, last modified by MindTouch on Jun 16, 2016

Views: 144 Votes: 3 Revisions: 3


This article provides the formula used to calculate packet loss.


  • VNQM
  • Orion IP SLA Manager 3.0 or later


Packet loss is calculated using the following formula.

Packet loss = (SD + DS + MIA) / (SD + DS + MIA + LA + OOS + N)


SD = rttMonLatestJitterOperPacketLossSD (<op_num/>)
DS = rttMonLatestJitterOperPacketLossDS (<op_num/>)
OOS = rttMonLatestJitterOperPacketOutOfSequence (<op_num/>)
MIA = rttMonLatestJitterOperPacketMIA (<op_num/>)
LA = rttMonLatestJitterOperPacketLateArrival (<op_num/>)
N = rttMonLatestJitterOperNumOfRTT (<op_num/>)
<op_num/> = The operation number of your VoIP Jitter operation.



Last modified
16:28, 16 Jun 2016