Campus Network

Nile announced on March 19, 2026, that its Secure NaaS platform now includes identity-based microsegmentation and a native NAC replacement built directly into the network fabric — eliminating the need for standalone NAC appliances entirely. The update introduces “Segment-of-1” per-device isolation that contains breaches to a blast radius of exactly one endpoint, reducing campus cyber risk by nearly 60% according to Nile. For CCIE Enterprise engineers who have spent careers deploying ISE, managing RADIUS servers, and carving VLANs for access control, this represents a fundamental shift in how campus security architecture gets delivered. ...

Cisco Software-Defined Access (SDA) is a three-plane fabric architecture that replaces traditional campus designs — spanning tree, HSRP, manual VLAN trunking — with a fully automated, identity-aware overlay network. LISP handles the control plane, VXLAN handles the data plane, and TrustSec handles the policy plane, all orchestrated through Catalyst Center. Key Takeaway: Understanding how LISP, VXLAN, and TrustSec interact at the packet level is what separates engineers who can troubleshoot SDA fabrics from those who just click buttons in Catalyst Center — and it’s exactly what the CCIE Enterprise Infrastructure lab tests. ...