5 posts
Cisco shipped Nexus Dashboard 4.2.1 in March 2026 with config drift reconciliation, a virtual Fabric Designer, Nexus One ACI/NX-OS interoperability, Live Protect, and deep AI fabric tooling. Here's a practitioner's breakdown of what changes day-to-day operations — and what's just nice to have.
Most online MTU calculators stop at 'GRE adds 24 bytes.' Real networks stack encapsulations — VXLAN over IPsec, GRE over IPsec, MPLS-then-VXLAN — and need the actual adjust-mss command for the device you're configuring. So I built one that does both.
A complete breakdown of all five BGP EVPN route types defined in RFC 7432 and RFC 8365 — what information each carries, when each is generated, and how they work together to build a VXLAN fabric.
A deep technical breakdown of VXLAN EVPN — what the underlay and overlay are, how VTEPs encapsulate traffic, why BGP replaced flood-and-learn, and how symmetric IRB enables Layer 3 routing across the fabric.
A look at why organizations are moving away from Cisco ACI toward NX-OS VXLAN EVPN managed by Nexus Dashboard — the operational, strategic, and market forces driving this shift in 2025 and 2026.
