How to get Netgate gateway to act as home router
I am using a SBG580 wireless cable modem gateway to connect to the Cox network. I recently purchased a Netgear 2100 gateway and an Asus wifi 6 AP. I want to disable the gateway/router functions from the SBG6580 and have the Netgate 2100 do those functions. I should be able to accomplish this if I set the SBG6580 to act as a bridge device and Cox registers a MAC address for public IP assignment.
I have setup the SBG6580 in the following way to do this:
Changed "Primary Network Only Mode" from "routed" to "bridged". The docs say when it is set to bridged it "Disables the network address and port translation settings on the gateway." This is the only setting I have on the device to change routing/NATP functions on the WAN side.
On the Netgate I set the WAN port to request DHCP addressing, and also I have set the MAC address to the HFC MAC address of the SBG6580, the same MAC address that Cox has registered to allow my device to operate on their network.
When I boot up the devices, the Netgate doesn't get assigned an IP address. Additionally the SBG6580 still requests a public DHCP address and gets one assigned to it. Is this because when I first connected the device to the Cox network I gave them the HFC MAC, the SBG6580 boots up, Cox sees that MAC and assigns the IP? I have tried to release the DHCP lease, then reboot the Netgate to see if it will get assigned a DHCP address, but that does not work even though the SBG6580 does release the IP.
I have tried to get the native MAC address of the Netgate registered so that it can request a public IP address. I have called and live chatted with customer service several times so far to tell them I have a new device on my network that I would like registered so that it can get assigned at public IP address, but they have not been of any help so far. When I ask to speak to the next tier of customer service, they attempt to upsell me to "preferred customer service" package at additional cost, or they try to upsell me Cox Panoramic WiFi gateways.
Has anyone reading this ever successfully setup a home network that simply uses the cable modem as modem only with a router on their home network. This is not a crazy setup at all, but Cox seems to want to prevent this from happening so they can sell me equpiment I guess? How can I explain to customer service what I want to do because none of them seem to have any comprehension that a cable modem does not need to be the wireless gateway.
Any help would be appreciated greatly!