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ExpertNet Lite Assessment Tool - User Guide
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devices, cpuUtilization for Xylogic). Interface utilization is retrieved from standard
MIB2 (ifInOctects, ifOutOctets, ifInDiscard, ifOutDiscards). If ifXTable extension MIB is
supported on a device, high-precision values ifHCInOctects and ifHCOutOctets are
retrieved instead of ifInOctets and ifOutOctets.
Q: The Delay graphs show a threshold of 80msec. Is this one way or round
trip?
A: All measurements are in one way delay. RTP tests can determine one way delay
without needing RTT. Ping tests are actually recording RTT and dividing by two.
Q: How long will a dataset remain on the server?
A: Datasets are archived after approximately six months. If this is not convenient, or
will interrupt your project, please let the ELAT team know.
Q: ELAT was not run in the network that it should have been. Can I rerun
ELAT with the same license file and same customer name?
A: License files are valid for a maximum of 30 days. As long as the license has not
expired when ELAT is started it will run.
Q: I need to rerun ELAT with the same customer at the same location. Will
the first dataset be overwritten?
A: No. We do not allow or support overwriting datasets. All datasets are considered
unique and stored separately, irrespective of how many times ELAT has been run at a
customer location.
Q: How much traffic does ELAT create on a network?
A: The ELAT Controller generates very little traffic. Default settings in
<ELATControllerBaseDir>\config\config.xml are:
1. Average number of pings/second is 2.
2. Maximum of 2 SNMP get requests/second. This is a default throttling parameter,
not an average value. SNMP poll interval for each node is by default equal 60
seconds. It means that if there are 10 SNMP-polled nodes, each of them will be
polled every 60 seconds, so there is a SNMP GET request issued to the network
every 6 seconds in equal intervals
Ping datagrams are 180 bytes. SNMP PDU's can vary from about 100 bytes to a few
kilobytes per request, depending on the amount of information per node. RTP traffic
datagrams range in size depending on the payload and can vary between 180 to about
300 bytes.
Q: How much bandwidth does ELAT use?
A: For each simutaneous call in an RTP test ELAT uses the expected bandwidth for a
single actual VoiP call.