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The locations of the Pakistani monitoring (red) and remote(red and blue) hosts are seen in the maps below.
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Pakistani PingER sites with lines showing the minimum RTT in msec. seen from NUST | Details of PingER sites in Islamabad, the lines show the average RTT seen from NUST | Details of PingER sites in Islamabad, the lines show the minimum RTT from PERN |
It is interesting to see (right hand map above) the large differences in minimum RTT between PERN and say NCP (at Quaid i Azam university in N.E. Islamabad) of < 10msec (blue line or more exactly 1.3msec) and that between PERN and NUST in the S.W. corner of between 40-80msec (red line or more exactly 44msec.). Presumably this is due to the routing of PERN connections in Islamabad region.
Also interesting to see (middle map above) is that the connection from NUST to the DSL site (blue line) is much less than that to the physically closer NUST host. This host (lo-0-gw.dsl.net.pk(203.82.63.254) is connected via a Micronet broadband connection rather than most ofthe of the other hosts which are connected via Nayatel to the PERN backbone. Nayatel in turn owns Micronet. The route from SEECS to the DSL host goes via Nayatel as far as we can trace it. This results in lower minimum RTT.
Archive, analysis site
IN 2010, a second instance of the SLAC archive-analysis site was set up at NUST. This provides backup for data and access, and improved performance for Pakistani users. The NUST hosts are are connected (see the traceroute) to PERN via Nayatel.
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