The combo worked great for a while, but now, my Mesh will no longer give me high up or down speeds.

If I connect directly to the BGW210, either wired or wirelessly, I actually get more than I'm promised.

Much of my home is hardwired, but again, I can take the same cable, plug it into a gigabit switch and I drop down to 100 x 100. If I move that cable up to the BGW210, I again, get more than I'm promised.

This has worked fine for multiple months and I really can't explain it. I am wondering if a firmware update came down to either device.

I need my upstream and that seems to be what is degraded the most with the Linksys in the mix. I have done all the normal things I would do, made sure IP ranges are different on the BGW210 and MX-10.

Any thoughts in the brain trust? I thought about just moving the BGW210 to the center of the home when it cools off and running a long fiber line through the attic, but there has to be another solution for something that was working fine.