What can cause auto-negotiation to fail on network?

Fresh3 days ago

Mar 15, 202623508 views

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Problem

Imagine you have both computer with a NIC that do gigabit with a router that do gigabit. What can cause auto-negotiation to fail on network ? (with proof if possible)

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Fix for: What can cause auto-negotiation to fail on network?

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Dodgy cables: I've just replaced a 3m patch lead to a laptop docking station that was causing problems - the gigabit connection was either working, very slow or connecting (and not working) at 100 or 10Mbit

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