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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 improvemnt for NCP is much more dramatic. Both are now small and comparable and < 2 ms.
can only measure the monthly loss rate down to 0.007% (since there are only 14400 pings = 10/30 min interval) thus the losses are no longer very instructive when the link performance improves beyond this level. The loss rates and the derived throughput In addition there is no obvious change in performance following Oct 2008.