Stop Writing CLI — Start Validating Design

The Project That Triggered This Post Recently, I was assigned to a mid-scale network migration spanning three data centers. The architecture was straightforward but labor-intensive: dozens of VRFs, hundreds of point-to-point BGP sessions in a BGP fabric, and a VMware NSX overlay. Despite this modern setup, I was asked to manually write all of the configuration changes as CLI. After coding over 6,000 lines of CLI that night, I paused to reflect: ...

November 18, 2025 · 3 min · Gary Wong

Tweaking the Cisco Nexus 9000 TCAM: A Real-World Fix and iCAM Insights

In a recent project, I had the opportunity to work with something “new” yet familiar. During a customer data center refresh project, one of the key tasks was upgrading their aging Nexus 5000 to the new Nexus 9000 series. The model in play? N93360YC-FX2, a powerhouse with enhanced capabilities — but with a few nuances. At first glance, porting over configurations from the N5K seemed straightforward. No FCoE, no zoning, no fancy storage integrations. ...

November 1, 2024 · 2 min · Gary Wong