Product : Links connections are bouncing.
Part Involved : LAN
Summary : The purveyor has installled three new data LAN ports close to magnetic resonance scanner
Scenario : Personnel of Computing office suspects about the field emitted of magnetic resonance scanner.
Company : The National Cancer Institute of Peru (INEN).
Reference Date : January 2008.
After the installation of the three LAN data ports the purveyor proceeded to testing the structured cabling related to these points and all of them passed successfully. That was a dark threshold to find the seed core of the problem. The simple tests did by personnel of computing office using the ping command throw that the connection was not solid, the time of response vary from time to time with not appearently some type of pattern related to it, then it started to suspects about the RF emitted of magnetic resonance scanner. The structured cabling was based on CAT6 and up to here there is no more evidences available to establish a technical diagnostic.
I have downloaded and installed a software tool to measure the bandwidth http://germanmedinavirtual.blogspot.com/2008/01/iperf-measuring-your-bandwidth.html between the LAN data port with problems and another pc at the other side of the networking structure -last one without problems-, then I begun to collect samples of connection between these two LAN data ports, one with the response time of the ping command and at the same time measuring the bandwidth using Iperf. Then the next video shows this process http://www.youtube.com/watch?v=mgKOd2eTLuU and the results gets while the software applications are executed querying to database , for example in this case the average of the bandwidth obtained reached 68MBits/Sec (too low).
Part Involved : LAN
Summary : The purveyor has installled three new data LAN ports close to magnetic resonance scanner
Scenario : Personnel of Computing office suspects about the field emitted of magnetic resonance scanner.
Company : The National Cancer Institute of Peru (INEN).
Reference Date : January 2008.
After the installation of the three LAN data ports the purveyor proceeded to testing the structured cabling related to these points and all of them passed successfully. That was a dark threshold to find the seed core of the problem. The simple tests did by personnel of computing office using the ping command throw that the connection was not solid, the time of response vary from time to time with not appearently some type of pattern related to it, then it started to suspects about the RF emitted of magnetic resonance scanner. The structured cabling was based on CAT6 and up to here there is no more evidences available to establish a technical diagnostic.
I have downloaded and installed a software tool to measure the bandwidth http://germanmedinavirtual.blogspot.com/2008/01/iperf-measuring-your-bandwidth.html between the LAN data port with problems and another pc at the other side of the networking structure -last one without problems-, then I begun to collect samples of connection between these two LAN data ports, one with the response time of the ping command and at the same time measuring the bandwidth using Iperf. Then the next video shows this process http://www.youtube.com/watch?v=mgKOd2eTLuU and the results gets while the software applications are executed querying to database , for example in this case the average of the bandwidth obtained reached 68MBits/Sec (too low).
Taking this reference it is clear way that there is a considerable loss detected into the link, the next step was to identify what device is causing this efffect and that was focused into some switch previous to the main switch close to telecommunication room; after it was replaced then the process to collecting samples from the link connection was repeated again such as I show at http://www.youtube.com/watch?v=xLiCfB8N06c reading a considerable differences of the bandwidth up to 93 MBits/Sec.
Here is, another case resolved.
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