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The reason being that the IP addresses of our web servers are not being advertised on the TEIN3 network because of current bandwidth between TEIN3 and PERN2. The bandwidth of our TEIN3 link has being fully utilized by our research institutes, and we are at maximum utilization of the TEIN3 link. Due to the lack of bandwidth availability we have not made the PERN website available from TEIN3 network. That is the only reason for PERN website not being seen from the TEIN3 cloud.
Universities in Pakistan Seen From SLAC
On the other hand one can see from a plot of ping Round Trip Time (RTT) from SLAC to the National Centre for Physics (NCP) in Islamabad (see below) that during the month of October 2008 the RTT dropped from over 360ms to under 310ms.
The traceroute from SLAC to NCP appears to go through TEIN3.
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The improvement in the PingER IPDV between SLAC and NCP (moved to TEIN3) and SLAC and PERN (not moved to TEIN3) can be seen in the plot below. It is seen that both have improved with time, though the improvement for NCP is much more dramatic. Both are now small and comparable and < 2 ms.
The derived throughput has improved by a factor of 5 since the start of 2008, however this does not appear to be directly correlated with the move to TEIN3.
Pakikstani Universities seen from PCP Islamabad
