I've recently got a new broadband connection, 250/100mbps over fiber, and a new router to go along with it. I've set up my router and it's working fine over wifi, I'm getting the maximum speed, and over ethernet cable I'm getting 250 down, but only 10 up. I've tested this on multiple wired devices, all connecting directly to the router.
I've tried resetting my router(ASUS RT-AC68U), and also tried installing a custom firmware (asuswrt-Merlin), but the issues persist. I've done some googling but it's hard finding any real results when basically searching for 'slow upload speed'.
Any and all input would be greatly appreciated!