App-Probe-PFR-Stats in Cisco SDWAN Viptela

The App-Probe-PFR-Stats are related to Performance Routing (PFR) in Cisco SD-WAN, which is designed to dynamically select the best path for network traffic based on real-time performance metrics. This feature is particularly useful for ensuring that traffic for specific applications or services is routed over the most optimal path, ensuring quality of service (QoS) and reducing the impact of network issues.

App-Probe-PFR-Stats Breakdown

The values provided in the App-Probe-PFR-Stats (example:- [None, 3, 17, 4]) likely represent performance metrics related to Performance Routing (PFR) for different paths. While these values can vary based on the configuration, typical metrics involved include:

1. Packet Loss (PL): The percentage of packets lost during transmission. A high packet loss indicates network congestion or instability.

2. Jitter (JT): The variation in packet arrival times. High jitter can affect real-time services like voice and video, leading to poor quality or dropped connections.

3. Latency (LT): The time it takes for a packet to travel from source to destination. High latency can cause delays in applications that require real-time communication, such as video calls or VoIP.

4. Throughput (TP): The amount of data transmitted over a network in a given time period. It measures the bandwidth capacity of a path.

However, the exact meaning of each number in the App-Probe-PFR-Stats array depends on your configuration. Cisco SD-WAN could be using Performance Routing with several different paths, each one contributing to different performance metrics (Packet Loss, Jitter, Latency, Throughput, etc.).

In your case, the stats [None, 3, 17, 4] could represent:

• None: Possibly indicating no issues or "no data" for one of the key performance metrics.

• 3: Could indicate packet loss (e.g., 3% packet loss on a particular path).

• 17: Likely the jitter (e.g., 17 ms of jitter).

• 4: Possibly latency (e.g., 4 ms of latency).

How to Use App-Probe-PFR-Stats

1. Application Performance: By analyzing the PFR stats, you can determine if the network is providing the optimal path for applications that require low latency, high throughput, or minimal jitter.

2. Routing Decisions: If one path is showing worse performance (e.g., high packet loss or jitter), Cisco SD-WAN can reroute traffic over a better-performing path to ensure that applications are still functioning at acceptable levels.

3. Network Path Optimization: Performance Routing in Cisco SD-WAN leverages app-probes to continuously evaluate the performance of different paths and dynamically select the best one based on these metrics. This allows the SD-WAN solution to maintain application performance even when some network links experience degradation.

Key Benefits of App-Probe-PFR-Stats in Cisco SD-WAN:

• Dynamic Traffic Steering: Automatically selects the best path for traffic, ensuring high performance for critical applications.

• Improved Quality of Service (QoS): With metrics like jitter, latency, and packet loss, you can ensure that applications like VoIP, video conferencing, and real-time collaboration perform optimally.

• Network Visibility: These stats give administrators real-time visibility into network performance, which can help in diagnosing issues and optimizing paths accordingly.