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Home > Success Center > VoIP & Network Quality Manager (VNQM) > VNQM Documentation > VNQM 4.5 Administrator Guide > Quality of Service metrics > Packet Loss

Packet Loss

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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 (rttMonLatestJitterOperPacketLossSD + rttMonLatestJitterOperPacketLossDS + rttMonLatestJitterOperPacketMIA <> 0)

packetLoss =

((rttMonLatestJitterOperPacketLossSD + rttMonLatestJitterOperPacketLossDS + rttMonLatestJitterOperPacketMIA) * 100) / (rttMonLatestJitterOperPacketLossSD + rttMonLatestJitterOperPacketLossDS + rttMonLatestJitterOperPacketMIA + rttMonLatestJitterOperPacketLateArrival + rttMonLatestJitterOperPacketOutOfSequence + rttMonLatestJitterOperNumOfRTT)

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
 
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