Available Bandwidth
	• Use available bandwidth estimator (ABwE) – Uses packet pair dispersion – Client at SLAC, mirror/server at NIIT
	• red line is the cross-traffic – deduced by looking at the variation over and above the minimum packet pair separation, the • green line is the bandwidth capacity of current bottleneck – deduced from the minmum packet separation • blue line is available bandwidth = capacity- cross-traffic.