36.1.2.0.1 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 36.2.2)

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 36.1.1) 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.