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Operators need visibility into service health before customers experience degradation. Even if control-plane protocols indicate that an L2VPN is up, issues such as packet loss, latency spikes, or unstable connections can go unnoticed without active performance monitoring. Proactive Operations, Administration, and Maintenance (OAM) helps network administrators track performance indicators and identify problems early. |
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To verify that EVPN services remained healthy beyond control-plane checks, in this test, we set up proactive OAM monitoring on the same testbed, with participation from Ciena, Cisco, HPE, and ZTE nodes, and a Cisco Crosswork controller. The Cisco Crosswork Automation provisioned an SRv6-based EVPN ELAN service using NETCONF. We confirmed the service was active by checking EVPN MAC address learning on all nodes. |
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The logical topology for this test is illustrated in the following figure. The underlying physical test bed is shared with the 5G xHaul with Segment Routing Interworking test. |
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[[~[~[Figure 4: EVPN Service Automation and Assurance Overview Topology~>~>image:487484161211367425_EVPN-OAM-usecase-v4.png~|~|alt="Figure 4" height="328" width="439"~]~]>>attach:487484161211367425_EVPN-OAM-usecase-v4.png||target="_blank"]] |
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Once the service was running, we enabled Ethernet Connectivity Fault Management (CFM) with Continuity Check Messages (CCM), Delay Measurement Messages (DMM), and Loss Measurement Messages (LMM). These OAM sessions targeted the remote Maintenance End Point (MEP) and used priority class 6 to match expected production traffic. Crosswork Assurance collected, using gNMI telemetry, service data, and OAM performance metrics from the routers, and provided a full view of the service performance metrics |
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|[[< Previous>>doc:5G xHaul with Segment Routing Interworking]]|[[Next ~>>>doc:Main.EANTC Transport & Cloud Networks Interop Test Report 2026.EVPN.WebHome]] |
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