37.1.2.0.1 trace

Tracks given variables. The variable (and associated information) is printed every time the value changes. Takes 1 argument:

cwnd_ Used to trace the cwnds of all paths.

rto_ Used to trace the RTOs of all paths.

errorCount_ Used to trace the error counters of all paths.

frCount_ Used to trace the number of times a fast retransmit is invoked.

mfrCount_ Used to trace the number of times the multiple fast retransmit algorithm is invoked. This trace variable can only be used with the MultipleFastRtx extension agent. (See Section )

timeoutCount_ Used to trace the total number of times a timeout has occurred on all paths.

rcdCount_ Used to trace the total number of times a route calculation delay (see Section ) has occurred on all paths.

Note: the actual value of these trace variables have no meaning. They are simply used to trace corresponding variables for potentially multihomed endpoints. For example, if a sender's peer endpoint has two destinations, the sender will maintain two cwnds. The cwnd_ trace variable will trace both of these cwnds together.