Airport Extreme Static ISP and DHCP only

Raymond Tan,

I have the same hardware setup as you (AT&T router with AirPort Extreme) but I am currently using DHCP/NAT and everything is working except for IPv6 on AirPort WiFi. I initially setup this configuration years ago because AT&T did not support AirPrint.

Questions for you are: if AirPrint works in your environment of DHCP Only? Does IPv6 work?

Since you already have another router, with NAT & DHCP enabled, in front of the AirPort Extreme, you would want that router configured with the static IP addresses provided by your ISP. Your Extreme, in this case, should be reconfigured as a bridge ... both NAT & DHCP disabled. All of your network devices will then get their IP addresses from the other router's DHCP service.

but I can't configure the airport to work with "DHCP only" mode and change de range to 192.168.1.

That is correct. The AirPorts only support the following three router modes: 1) NAT & DHCP enabled, 2) NAT disabled / DHCP enabled, & 3) Both NAT & DHCP disabled

What Is your networking goal with the static IP addresses from your ISP? Are they to be used by a single device on your network, like a dedicated server OR just to be provided to your router?

Hi Guys,

I also have a problem with setting the airport extreme in dhcp mode only.

It actually works when I connect a computer directly in a lan port but won't work through wifi.

The wifi client gets the ip address but no internet access.

Using a mac book pro 13" with Yosemite.

Thanks,

Mat

Apple primarily designed the "DHCP only" mode to support those situations where your ISP provides you with multiple public static IPs that you want to distribute to multiple servers on your local network. Is this what you are trying to do? If so, please start a new post, provide the make & model of your current networking hardware and what exactly you are trying to do. Thx!

Ok mine is airport extreme connected to AT&T wifi router. I turned off wifi in the ATT router and connected LAN port to Airport extreme WAN port. ATT has DHCP and NAT with DHCP range from 192.168.0.64 - 192.168.0.253. Back in airport extreme which I use for WiFi coverage, I set static WAN IP to what the DHCP has previously assigned. Then set DHCP only on LAN with DHCP range of 192.168.0.2 - 192.168.0.62.(basically, I avoided IP of my ATT router could assign) I then use openDNS. All my wireless clients are are getting IP assignments and access internet. I haven't seen address resolution issues and it seems like NAT is still provided in my ATT router, I hope.

I do this because I want to set up Vmware vcenter 6 on my server and I need DHCP reservation which my Apple extreme supports but not my ATT router and neither my Dlink wifi extender to my home lab.

Performance wise, I feel like it takes it longer to resolve internet address. I haven't done scientific timing. But it works.