Deco X55 won't setup with 10/100 WAN Port
I have a 1500 foot ethernet <-> optical <-> ethernet bridge from my cable modem to my house. The ethernet interfaces are 10/100 as that seemed sufficient at the time I put in the system, and is still close enough to matching my ISP speed that I haven't bothered to upgrade the interfaces.
When I tried to set up my network with the a new Deco X55 system, it would get to the point where it was checking the internet connection, and eventually timeout and fail, there was no debug information, and support was fairly clueless (I had not told them about the bridge, so probably my fault).
I suspected the bridge might be the problem, so I walked one router to the modem, connected it to the router directly, and the setup completed normally. When I then installed the system in the house using the bridge it worked fine, just giving a warning message about "Abnormal Port Speed" with details that the port might not support gigabit speed.
I realize my situation is unusual, however it seems like a bug not allowing a connection check to complete if the port speed is low. At the very least there should be a warning about the reason for the failure.
I don't know what the lower port speed limit is which will allow the setup to complete, but users should be aware this may be a problem.