https://blog.no42.org/tags/juniper/ Recent content in Juniper on №42 Hugo en Thu, 17 Jul 2025 00:00:00 +0000 https://blog.no42.org/article/gnmi-hpe-juniper/ Thu, 17 Jul 2025 00:00:00 +0000 https://blog.no42.org/article/gnmi-hpe-juniper/ <p>This document describes how you can set up a lab environment for testing gNMI using a virtual HPE Juniper router running Junos 24.2 R1-S2.5. It shows how you can collect metrics for interfaces and CPU utilization collected with OpenNMS. This isn&rsquo;t something I do every day, so I just preserve this here for my future self and the ones who want to get up to speed a bit quicker.</p> <h2 id="what-you-will-learn">What you will learn</h2> <ul> <li>Enable gNMI over gRPC with sensors on a HPE Juniper router</li> <li>Verify the gRPC connections and configuration</li> <li>Enable OpenNMS Horizon to subscribe to gRPC streams for sensor data</li> <li>Set up TLS on gRPC using a self-signed certificate authority</li> <li>Visualize the collected data in Grafana</li> </ul> <h2 id="limitations">Limitations</h2> <ul> <li>Streaming telemetry can only be configured from the OpenNMS Core instance, see enhancement <a href="https://opennms.atlassian.net/browse/NMS-18064">NMS-18064</a></li> <li>Metric labels for network interfaces are right now just resource id strings</li> </ul> <h2 id="before-you-begin">Before you begin</h2> <p>You need the following environment to get a lab running:</p>