So without holding classes on networking I dive into it.

1. Which Ethernet ports are Auto-MDIX?
Why I ask is that if someone wired the cable ends, the Auto-MDIX could have helped.

2. Did you power cycle after the changes?

3. If you wired it yourself, tell me all about it. Pairing scheme, etc.

4. And if you do it again, use pre-made cables. Our company no longer allows techs to wire cables when pre-mades are available. The amount of time lost is why. We have even let go a few techs over this.