PingER from SLAC monitors 4 sites in Bangladesh. The Ping Round Trip Times (RTTs) are seen below. We observe:
- The black bar (no data or host unreachable - 100% packet loss) observed 2014-09-05 in all plots is due to the host at SLAC being down and not making the measurements.
- The median RTTs seen from SLAC are relatively consistent from site to site and around 350ms,
- The lack of regular day vs night variations in the RTTs suggest that the links are not congested.
- The RTTs for each site are also relativlet consistent (little jitter) with few large RTTs.
- Daffodil appears to have the lowest loss rates (backgound color is usually cyan meaning no loss
- BRAC university was experiencing of lot of unreachability (black) and was no longer reachable towards the end of September.
- DUET experienced a lot of packet loss (note yellow and orange backgrounds) until mid August 2014.
- RU had a burst of lossiness (magenta background) between Oct 12 and Oct 15 29014.
- The spike in RTT seen 2014-09-24 indicates a possibel common cause (ie.a a link shared between all sites)
More detail for the Daffodil site are seen below:
The route from SLAC to Daffodil goes from SLAC to Palo Alto (3 miles away), to New York, London, Paris, Mumbai and Bangladesh.