Path State Configurability and Monitoring

Oracle SD-WAN Edge 4.4 allows users to control when a Path is marked bad and how long a bad Path is kept on probation. It also gives users greater visibility into why a bad or dead Path is in its current state.

1. Oracle SD-WAN Edge 4.4 gives you greater control of the Bad Loss Sensitivity feature with the ability to manually configure the threshold for loss before a Path is marked BAD.
2. Now you can manually configure Silence Period, or the time that must elapse before a Path is marked BAD after packets are determined to be overdue.
3. Now you can also manually configure the Path Probation Period, or the time that must elapse before a Path is marked GOOD, after the symptom (e.g., loss or silence) clears.

The following new attributes are configurable:

• Bad Loss Sensitivity: The Path state transitions from GOOD to BAD when a specified amount of loss is observed. When set to On, loss is evaluated based on an internal formula. When set to Custom, loss is evaluated based on user-defined threshold. When set to Off, loss does not affect Path state.
• Percent Loss Over Time: Designate the Percent Loss (via drop-down menu) that is tolerable Over Time (via drop-down menu). Together these attributes establish what percentage of loss is tolerable over a specified period of time. Once exceeded, the Path State transitions from GOOD to BAD.
• Silence Period (ms): The Path state transitions from GOOD to BAD when no packets are received within the specified amount of time.
• Path Probation Period (ms): The probation period before changing the Path state from BAD to GOOD, after the symptom (e.g., loss or silence) clears.

To configure Bad Loss Sensitivity:

1. Log into your Appliance's web console.
2. Click on Manage Network, and then Configuration.
3. Open Connections → Autopath Groups → [Autopath Group Name].
4. Click the edit icon and choose Custom from the Bad Loss Sensitivity drop-down menu

   

Figure 6: Configuring New Bad Loss Sensitivity Attributes

1. Choose a Percent Loss and a corresponding Over Time amount from their respective dropdown menus to establish a threshold for loss over time before the Path state will transition from GOOD to BAD.
2. Define a Silence Period (in milliseconds) from the drop-down menu. If no packets are received within the Silence Period you designated, the Path state will transition from GOOD to BAD.
3. Define a Path Probation Period (in milliseconds) from the drop-down menu. After the symptom (e.g., loss or silence) clears, the Path state will transition from BAD to GOOD once the Path Probation Period you designate here elapses.
4. Click the checkbox next to Instability Sensitive if you want latency penalties and spikes considered in the Path scoring algorithm.
5. Click Apply.