I just purchased a used GS324T switch. I have Port 1 plugged in to a Nighthawk wireless router. The wireless router is connected to a cable modem. All wireless clients on the Nighthawk work. All 10/100 and Gig devices plugged directly in to the Nighthawk work.
None of the 10/100 connections plugged in to the GS324T appear to work. Those ports who have 10/100 devices connected blink orange, but those devices are unable to connect to anything. These 10/100 connections aren't very intelligent (Chamberlain MyQ, Samsung TV, Roku 3), so troubleshooting is limited. When I plug these connections directly in to the Nighthawk, they work properly.
I connected a laptop with a 1gig network ethernet card in to one of the network jacks that a Roku 3 was plugged in to (wireless was disabled on the laptop). The laptop connected to the ethernet network just fine and was able to reach the internet.
I am currently running firmware 18.104.22.168. There was a second image with the 22.214.171.124 firmware on it. I activated and booted to it and got the same results.
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