Packet Loss in SolarWinds VNQM
Packet loss is a quantitative measure of information loss over a given network connection. Though packet loss is inevitable in any network environment, the goal is always to identify where packets are lost in transmission so you can act to minimize information loss and maintain high QoS for your services.
VoIP and Network Quality Manager calculates packet loss in the following way:
if (rttMonEchoAdminNumPackets > 0)
packetLoss = 100 * (rttMonEchoAdminNumPackets -
rttMonLatestJitterOperNumOfRTT) / rttMonEchoAdminNumPackets
else packetLoss = 0;
if (rttMonLatestJitterOperPacketLossSD + (rttMonLatestJitterOperPacketMIA/2) + ((rttMonLatestJitterOperPacketLateArrival + rttMonLatestJitterOperPacketOutOfSequence + rttMonLatestJitterOperNumOfRTT)/2) <> 0)
packetLossSD = (rttMonLatestJitterOperPacketLossSD + (rttMonLatestJitterOperPacketMIA/2) + ((rttMonLatestJitterOperPacketLateArrival + rttMonLatestJitterOperPacketOutOfSequence + rttMonLatestJitterOperNumOfRTT)/2)) * 100 / (rttMonLatestJitterOperPacketLossSD + (rttMonLatestJitterOperPacketMIA/2))
else
packetLossSD = 0
if (rttMonLatestJitterOperPacketLossDS + (rttMonLatestJitterOperPacketMIA/2) + ((rttMonLatestJitterOperPacketLateArrival + rttMonLatestJitterOperPacketOutOfSequence + rttMonLatestJitterOperNumOfRTT)/2) <> 0)
packetLossDS = (rttMonLatestJitterOperPacketLossDS + (rttMonLatestJitterOperPacketMIA/2) + ((rttMonLatestJitterOperPacketLateArrival + rttMonLatestJitterOperPacketOutOfSequence + rttMonLatestJitterOperNumOfRTT)/2)) * 100 / (rttMonLatestJitterOperPacketLossDS + (rttMonLatestJitterOperPacketMIA/2))
else
packetLossDS = 0
| rttMonLatestJitterOperPacketLossSD | 1.3.6.1.4.1.9.9.42.1.5.2.1.26 |
| rttMonLatestJitterOperPacketLossDS | 1.3.6.1.4.1.9.9.42.1.5.2.1.27 |
| rttMonLatestJitterOperPacketMIA | 1.3.6.1.4.1.9.9.42.1.5.2.1.29 |
| rttMonLatestJitterOperPacketLateArrival | 1.3.6.1.4.1.9.9.42.1.5.2.1.30 |
| rttMonLatestJitterOperPacketOutOfSequence | 1.3.6.1.4.1.9.9.42.1.5.2.1.28 |
| rttMonLatestJitterOperNumOfRTT | 1.3.6.1.4.1.9.9.42.1.5.2.1.1 |
| rttMonEchoAdminNumPackets | 1.3.6.1.4.1.9.9.42.1.2.2.1.18 |