What is the typical lifespan of a medium enterprise switch in a business environment?

A medium enterprise switch usually runs for 5 to 10 years. Many companies plan a refresh at 5 to 7 years, even if the hardware still works, because support and speed needs change before the hardware dies.

Hardware life vs. support life

Hardware can keep working for a decade. The limit is usually vendor support. A vendor announces end of sale, and end of support follows, often about five years later. After that you get no security patches or replacement parts.

What fails first

• Fans, which wear out and cause overheating.
• Power supplies and electrolytic capacitors.
• PoE circuits that carry heavy loads.
• Individual ports.

MTBF figures on datasheets, often in the hundreds of thousands of hours, describe averages, not how long your unit will last.

What shortens switch life

• Heat and poor ventilation in closets.
• Dust.
• Unstable power without a UPS.
• Heavy PoE use.

Why businesses replace switches early

• Moving from 1 Gbps to 2.5, 10 or 25 Gbps uplinks.
• Wi-Fi 6 and Wi-Fi 7 access points needing more PoE power.
• Security requirements that old firmware cannot meet.
• No firmware updates after end of support.

How to plan

Record the purchase date and the vendor's end-of-sale date for every switch. Budget for replacement at about year 5 to 7, and keep one spare for critical locations.