Modem Mode on Hub 4 won't work - no DHCP/WAN connection (but connection fine in Router Mode)
Hi All
I've had an issue with my Hub 4 come up overnight which I'm wondering if anyone has any ideas around.
I have a 500mb Virgin connection which works fine when the Hub 4 is in router mode. It has been operating however in Modem Mode, connected to a Netgear Raxe300 NightHawk with no problem for months.
I woke up this morning with no connection. Hub 4 light was still green. When looking on the Netgear router, there was no IP address coming on the WAN port of the Netgear (DHCP didn't seem to be working). Reset Hub 4, nothing. Tried different cables, nothing, reset Netgear, nothing. Couldn't access the Hub 4 in modem mode through the Netgear because that internal IP (192.168.100.X) wasn't coming through DHCP.
I manually set a static IP on the WAN port of the Netgear to 192.168.100.13/255.255.255.0 with default gateway as .1 - through this I COULD then connect to the UI for the Hub 4 (success!). However, not the internet... I took some screenshots of the admin page on the Hub 4 but nothing seemed to suggest an issue. Note in the last screenshot there's no IP/WAN information though when in router mode, on this page it does show a WAN connection status.
For now I've flipped it back into Router Mode so accessing the internet via the Hub 4 but I really need to get the router working again in Modem Mode. Any ideas? It almost feels like there's been some firmware update that's broken modem mode? It sounds like for whatever reason when in modem mode, it just won't connect externally nor will it give an internal IP to the Netgear - did plenty of "leaving it off for 2 minutes" and reconnecting but no luck.
Thanks!
The correct procedure is to power on the hub first and then the router as doing it this way ensure that the hub's modem goes though its complicated initialisation with the CMTS and gets the data it needs from the DHCP server for the WAN IP address and routing table. When you then power on the router all the work has been done by the modem and the router will get its WAN IP address as the modem is acting as a bridge. If you power on the router before the hub there is the risk that the router will fail to get its IP address and/or begin to prematurely assign IP addresses to connected devices, which is why a power recycle of the router will be needed to get it to work.