I have a really odd thing happening on my home network. I live in a Condo and it's pre-wired with Cat5E to every room. When I plug all Cat5E cables into my Dlink DGS-1005D GbE switch, one of the links auto-negotiates down to 100Mb. I've confirmed that everything end - end supports GbE on this cable. When I plug this same cable directly into a laptop it correctly negotiates to 1000GbE but then when I plug the same line back into the GbE switch it negotiates down to 100Mb.
To me this looks like an issue with the switch. The thing is, other cables correctly negotiate to 1000GbE so I'm hesitant to point blame anywhere at this point. Has anybody ever seen something like this?
Would this be a case of the auto-negotiation mechanism in the switch being overly aggressive versus the laptop being a bit more forgiving with respect to line speeds.
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