Supply Chain Network

How do you connect 4 independently-addressed sites without ever exposing their internal IPs to each other? That's the core problem this project solves.

I designed, configured, and fully documented a 4-site enterprise network (HQ1, HQ2, SP Office, Users Network) interconnected through a centralized Public/Transit core — 7 routers, 8 VLANs, and end-to-end verification against the live implementation.

🔹 VLAN segmentation & inter-VLAN routing (Multilayer Switch at HQ1, Router-on-a-Stick at HQ2)

🔹 Static routing at every site-to-core boundary; OSPF confined to HQ1's internal link

🔹 NAT/PAT (Dynamic + Static) concealing overlapping private addressing across all sites

🔹 Dual LACP EtherChannel + Spanning Tree for redundancy

🔹 SSHv2 network-wide, Telnet as secondary access

🔹 A complete Issue Resolution Log covering every discrepancy found — including two documentation-accuracy fixes caught during final review — and how each was resolved

Full report attached below.