Been using my Superhub 2ac in Modem mode for ages even swapped the firewall behind it a couple of times with no issue, power on firewall, reboot modem, new IP issued, dead easy.
However I am swapping my firewall again and it won't issue an IP to the firewall, or any device I attach to it except the previous firewall!
I have tried the normal, power on firewall, reboot modem. I have even tried leaving the modem off for 5 minutes.
Out of annoyance I even put the modem into router mode and devices connecting on the Wi-Fi worked fine, but any device I connected with a wire didn't get an IP! I swapped it back to modem mode and same result, only my previous firewall gets an IP!
Any thoughts? I'm about to throw the thing out the window!