HA VPN with BGP: Building Enterprise-Grade Hybrid Connectivity on GCP

This is Phase 3 of the hybrid AI inference platform. In the previous post, I connected a Mac Mini running Ollama to a GCP VM through Tailscale. That works for direct connectivity, but it is a single tunnel with no redundancy and no dynamic routing. This phase adds the enterprise-grade networking layer: HA VPN with BGP. What I tried first (and why it failed) My original plan was to build HA VPN directly between GCP and my Mac Mini, using Tailscale as the underlay network. The Mac Mini’s Tailscale IP is 100.80.121.94, and I configured it as the peer endpoint for the VPN tunnels in Terraform. ...

March 31, 2026 · 7 min