3 Replies Latest reply on Feb 20, 2013 8:32 AM by noor

    Monitor VPN Connection Quality

    travisrigby New Member

      Is there a way to track and monitor VPN Connections? If the connection reaches a certain quality level, is there a way to have it fire off e-mail notifications to let me know our offices are experiencing issues?

        • Re: Monitor VPN Connection Quality
          levi Employee

          travisrigby:

           

          Thank you for asking this question.  One way you can monitor connections is with Network Quality Monitoring (NQM) (please review the Configuring VQM in AOS document for detailed information about configuration and advanced applications).  NQM is a collection of tools used to measure or verify the service level or quality of a network in real time by measuring and grading a network’s path from an AOS device to another device. Network elements such as congestion and improper configuration can cause problems, such as packet loss, inter-packet delay variance, and latency, that can degrade network traffic between two endpoints. Voice and video network traffic is more sensitive to errors such as inter-packet delay variance and packet loss. Depending upon the results of the test(s) or probe(s), the AOS device can be configured to take actions to assist in network backup (via the route table). Therefore, NQM provides valuable information about the condition of the network that allows administrators to be aware of network issues, service quality, bandwidth utilization, and available resources by testing the quality between two endpoints.

           

          A network probe is a facility that can actively measure certain parameters across a network path. A network probe may optionally use the measured results and configured thresholds of performance to declare a pass or fail status related to the probe. ADTRAN’s NQM feature consists of two new network monitor probe clients that generate test packets towards a probe endpoint and a network monitor probe server that responds to probe packets. The test traffic is generated at a source host and is sent to a target host with a participating traffic responder. Synchronized and accurate clock sources are only needed for proper functionality and measurement of the one-way delay on the network. The NTP server feature is used to provide synchronized timing to source and target remote devices to obtain credible performance results for one-way delay. Round-trip loss, delay, and Inter Packet Delay Variance (IPDV), do not require clock synchronization. A network probe can assist in troubleshooting, analyzing, or managing quality service levels. A track is an object created to monitor a network probe for changes of state. The track can be configured to perform a specific action based upon the probe state detected. Association between a track and a probe occurs through referencing the probe in the track’s configuration. Once the track is registered with the probe, whenever a change occurs with the probe’s state, an event is sent to the track. Tracks are optional, and typically not used when solely collecting statistics on current network performance and quality.

           

          Further, you may want to review the Configuring the E-Mail Agent in AOS document for detailed instructions about how to have the AOS unit generate e-mails based on multiple variables.

           

          Let me know if you have any additional questions after reviewing these documents.

           

          Levi

          • Re: Monitor VPN Connection Quality
            levi Employee

            travisrigby:

             

            I have marked this post as "assumed answered," but do not hesitate to reply to this thread if you have further questions on this topic.  I will be happy to help.

             

            Levi

              • Re: Monitor VPN Connection Quality
                Employee

                I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily. If you don't feel like the answer I marked was correct, feel free to come back to this post and unmark it and select another in its place with the applicable buttons.  If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.

                 

                Thanks,

                Noor