Should DHCP be turned off on DSL Modem?

I have an AEBS (5th gen) and an Airport Express in a roaming configuration (connected by ethernet cabling) as directed by Apple's article HT4260. An Actiontec GT701-WG is my DSL modem with the wireless turned off. I assumed DHCP should've been turned on on the Actiontec because this function was being performed by the AEBS. However, after a day the AEBS wouldn't connect to the internet so I turned DHCP "on" on the Actiontec and AEBS now connects. My fear is this will cause problems down the road (two devices performing DHCP).
Thanks for the help. I'm not tech savy and would like to finish the setup properly.
Jeff

In a roaming network, you would want the router directly connected to the Internet to have both NAT & DHCP enabled ... even if you want its wireless disabled. All other routers downstream of this router should be in bridge mode (NAT & DHCP disabled). If you haven't seen it already, you may want to use this Apple Support article as a reference.

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I just spent several hours trying to track down proper instructions for setting up my Apple AEBS to do the PPPoE, DHCP and NAT while connected to an ActionTec M1000 (no wireless module). It turns out my initial set ups on both devices were correct, but that the order for rebooting and reconnecting the two devices is critical. All of the threads I found on this forum and on many others suggested this was not possible, but it is. What I don't yet know is whether it is the best method for running my home network DSL connection to my ISP (CenturyLink).
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Message was edited by: Bud Shaw

Now I have to see if this is a more stable configuration than the flaky one I had before while using the AEBS as a bridge and the M1000 to do everything.
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No one can accurately predict in advance what the actual results might be. I've tried both ways with different products and cannot say that one method is better than the other. What works is best.
In theory, it is preferable to have the modem provide the PPPoE connection service since it is the device connected directly to the Internet.
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What you are asking about is generally possible but probably not with an Airport Extreme. As others have noted you SHOULD be able to access a DSL modem in bridge mode via it's "lan" IP address if you directly attach a cable to it and configure your computer with appropriate static IP settings (I'm assuming that in bridge mode the DSL modem has it's DHCP server disabled).
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First off I'm still trying to figure all this out. I do not understand most of the "lingo" thrown around this forum. So with that said...I've read several places that if I have a current wireless/modem router combo (see below) ya just have to set-up to "bridge" the TC. Correct? But is the TC then handling the wireless transmission or is the current wireless still being used? I obviously don't know what bridge means or does.
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There is no need to tie Verizon into this. To connect your modem you will need to set it up for PPPoE connectivity with the right username and password, or if you're in a DHCP area just leave the DSL modems disconnected for a few hours to break the lease. Keep the Verizon modem around should you require any support, since they'll likely ask you to connect it before troubleshooting the line.
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Should DHCP be turned off on DSL Modem?

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