![\"IPv4](\"https:\/\/media.soporteclientes.net\/images\/1787643104_ef880491298a.png\")
<\/p>\n<\/p>\n
\nWhat actually keeps a SaaS infrastructure team awake at night? Usually, it’s not the code. It’s the network. Continuing to rely on IPv4 might seem like an anachronism, I know. But the full transition is taking longer and costing more than expected, and in the meantime, managing subnets properly is what makes the difference between a clean scale-up and an operational headache. Segmenting properly isn’t just an exercise in pretty architecture. It’s what allows you to squeeze every IP address, leverage your firewall, and avoid having to rebuild everything from scratch when a thousand customers come on board at once.\n<\/p>\n
\nBefore you start slicing up IP blocks, it’s best to look at the numbers objectively. And not just today’s numbers. What happens if we multiply the load by ten next year? Take the following into account:\n<\/p>\n
\nDoing this analysis thoroughly saves you from running out of addresses in the middle of a launch. It also prevents overspending on blocks that will just sit there, forgotten.\n<\/p>\n
\nThere is no one-size-fits-all tactic. The approach changes significantly depending on whether you are just starting out or already pulling in millions in revenue. For years, I’ve seen people make the same mistake: copying someone else’s network scheme. Here are the approaches that usually work:\n<\/p>\n
| Strategy<\/th>\n | Typical use case<\/th>\n | Common sizes<\/th>\n | Pros<\/th>\n | Cons<\/th>\n<\/tr>\n<\/thead>\n |
|---|---|---|---|---|
| Flat subnet<\/td>\n | Small teams, simple apps<\/td>\n | \/24, \/23<\/td>\n | Easy to manage<\/td>\n | Zero isolation, outgrows quickly<\/td>\n<\/tr>\n |
| Hierarchical \/ Per-tenant<\/td>\n | Multi-tenant SaaS<\/td>\n | \/28 \u2013 \/24<\/td>\n | Good isolation, scales well<\/td>\n | Denser routing, requires planning<\/td>\n<\/tr>\n |
| VLSM (Variable Length Subnet Masks)<\/td>\n | Mixed workloads<\/td>\n | \/30 \u2013 \/22<\/td>\n | Optimizes space, granular control<\/td>\n | Requires more thought and maintenance<\/td>\n<\/tr>\n |
| Dynamic pooling<\/td>\n | Automated provisioning<\/td>\n | Variable<\/td>\n | Highly flexible, rapid deployment<\/td>\n | Requires automation, fragmentation risk<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\nBest Practice: Align Subnet Sizes with Growth<\/h3>\n\nThe golden rule? Assign blocks slightly larger than what you need right now. Perhaps a \/27 or \/28 per client. This leaves them room to breathe without wasting addresses needlessly. In the long run, you’ll be grateful.\n<\/p>\n Scaling Subnets as Your SaaS Company Grows<\/h2>\n\nGrowth brings its own set of problems. More clients, more traffic, more everything. And network management gets complicated.\n<\/p>\n
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