Arista Labs — Hands-On MLAG Configuration

This lab-based course gives network engineers dedicated hands-on practice configuring and troubleshooting MLAG (Multi-chassis Link Aggregation Group) on Arista switches. MLAG is a critical high-availability technology that allows two Arista switches to appear as a single logical switch to connected devices, eliminating spanning tree blocked ports and enabling full active-active redundancy. Unlike lecture-based courses, this offering is entirely lab-driven — students spend the majority of their time working directly in simulated Arista environments, applying configurations and observing real EOS behavior. The lab series begins with MLAG fundamentals, walking students through the peer-link configuration, MLAG domain setup, and the peer keepalive mechanism that detects peer failures. Students then configure MLAG port-channels connecting to downstream switches and servers, verifying traffic load balancing and failover behavior.