AirPort advice re DHCP and bridging

In December, we posted: "Roberto Jourdain found that, to get his AirPort setup to work, he needed to enable the "Enable DHCP server on Ethernet" and "Enable AirPort to Ethernet bridging" settings - even though the Apple document on AirPort Networks states not to enable these options if you are using a cable modem." Craig Hunter has offered this advice regarding such problems:

With the original Base Station, he may be doing something wrong, like setting up wired clients to request their IP via DHCP. You can use an AirPort Base Station to route internet access to wired clients using NAT only, and not DHCP - which can potentially interfere with the cable network (something we previously found to be the case on our network). You just need to set up TCP/IP on the client computers manually, giving them fixed IP addresses in the range 10.0.1.51 to 10.0.1.253. This is discussed in the Apple document.

The newer Base Stations come with a separate LAN port. So serving DHCP to wired clients should no longer be an issue, as the Base Station should only be serving over the LAN port, which is isolated from the cable network. In this case, there is no issue with enabling DHCP server over Ethernet. The Apple document only deals with the original Base Station, which may be part of the confusion."