Documentation forHybrid Cloud Observability Essentialsand VoIP and Network Quality Manager

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.

SolarWinds 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