Value = % availability (e.g. = # unavailable samples / total samples)
	NetworkTestTool
	toolName   = ping
	Network TestInfo
	source   = oceanus.slac.stanford.edu
	destination   = www.cern.sh
	NetworkToolSetting
	startTime   = 200304010030.123456 (start at beginning of month)
	time     = 200304302359.654321 (end at end of month)
	packetSize = 100
	numPackets = 10 (this is the number of packets in a cycle or more generally the number of packets sent as   probes for determining connectivity, see RFC 2678, it is not the total packets for the month, i.e. it is not 30days*24hr*60mins*10pkts/30min = 14400?)
	packetSpacing = periodic
	packetGap   = 1.0
	packetType   = ICMP
	lossThreshold    = 20 (the waiting time of RFC 2678)
	NetworkPathAvailabilityStatistics
	Property     Type   Requirement Description
	Level
	MTBF     uint32    O      Mean Time Between Failures
	in seconds
	MTTR     uint32    O      Mean Time To Repair
	in seconds
	downs     uint32    O      Number of periods when path was not available
	medianOutageLength uint32   O      Median
	value     real32   M      Availability =
	100*(#unavailable cycles /
	total cycles)%.