One common anti-pattern is upgrading components in isolation. Faster NICs without matching switches, or new switches with legacy uplinks, simply relocate bottlenecks.
Another issue is ignoring switch backplane and uplink aggregation. A “2.5G switch” with constrained internal bandwidth delivers inconsistent results under load.
Treat upgrades as system-level changes, not shopping lists.
Real upgrade case studies are documented here:
https://comsiam.com
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