Path monitor behavior
The process that path monitors use to monitor paths.
- The path monitor starts a ping or TWAMP session toward the target.
- The path monitor operates continuously throughout the configured interval period. Thus it provides a continuous stream of metrics. This data can be used to update the policy state and/or feed any external management entity with path information of greater precision.
- The path monitor compares the result with the requirements of each policy associated with the path monitor, in turn. It determines the current compliance state of each policy.
- The path monitor pushes the compliance state of each policy to PBR, which influences local routing decisions.
- The path monitor waits from the start of the last session to the end of the interval period, and then it repeats this process with a new session.
If the path monitor detects total loss of probe packets then it will discard the results and consider the collected sample to be Non-Compliant with all policies.
Each configured path monitor operates independent of other path monitors.