Design Private Addressing for the Merger You Have Not Had Yet
Use RFC 1918 private addressing principles to avoid avoidable renumbering risk.
RFC 1918 gives you private space; architecture decides whether that space stays usable. Private does not mean unique The same private prefixes can exist in thousands of organizations. They work because they are scoped locally. When two scopes connect, ambiguity appears. That is why mergers, partner VPNs, and cloud connections expose weak address plans. Structure beats convenience A good plan leaves room for summarization. Regions, environments, and major functions should have recognizable blocks. That lets routing tables stay smaller, firewall rules stay understandable, and troubleshooting stay faster. Plan for controlled imperfection You will inherit overlaps. The professional move is to…
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