23-15To do… Use the command… RemarksConfigure the destination port destination portport-numberRequiredBy default, no destination port numberis configured for a test operation.The destination port number must bethe port number of the listening serviceconfigured on the NQA server.Configure the size of probepackets sent data-size size Optional100 bytes by default.Configure the filler string of aprobe packet sent data-fill stringOptionalBy default, the filler string of a probepacket is the hexadecimal number00010203040506070809.Specify a source port numberfor a probe request in a testoperationsource portport-numberOptionalBy default, no source port number isspecified.Configure the source IPaddress of a probe request in atest operationsource ip ip-addressOptionalBy default, no source IP address isspecified.The source IP address must be that ofan interface on the device and theinterface must be up. Otherwise, thetest will fail.Configure common optionalparametersSee ConfiguringOptional ParametersCommon to an NQATest GroupOptionalConfiguring a Voice TestIt is recommended not to perform an NQA UDP jitter test on known ports, namely, ports from 1 to 1023.Otherwise, the NQA test will fail or the corresponding services of these ports will be unavailable.A voice test is used to test voice over IP (VoIP) network status, and collect VoIP network parameters sothat users can adjust the network according the network status. The procedure of a voice test is asfollows:1) The source (NQA client) sends voice packets of G.711 A-law, G.711 μ-law or G.729 A-law codectype at regular intervals to the destination (NQA server).2) The destination affixes a time stamp to each packet that it receives and then sends it back to thesource.3) Upon receiving the packets, the source calculates the delay jitter and delay by calculating thedifference between the interval for the destination to receive two successive packets and the
