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The cable was fine: overlapping subnets on a two-NIC machine

This story is from 2026-10-21. It is preserved in the archive; the latest stories are on the live feed.

While isolating my AI model cluster on its own network segment, I could not reach a host on another network from my lab machine. I was suspecting a faulty NIC card, a faulty cable, or a wrong connection on the switch in the lab. AI came in handy to detect it. I asked it to trace why I was not able…

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  1. 2026-10-21 21:31 · DEV Community — AI
    The cable was fine: overlapping subnets on a two-NIC machine

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