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)%.