Anyone have any thoughts on potential double NATing? I have never experienced an issue personally but I have been told that some services on lan (2) might experience some issues NATing through 2 routers? I believe most people that experience issues are playing games etc.
Anyone have thoughts?
IF the address scheme is separate enough, it will work. When you try to do overlays on the same addresses is where the trouble comes in. That and mixing up the ports. The second (and subsequent routers/AP's) MUST see the earlier network as a 'WAN'. Each layer MUST have a different address range for DHCP, and then obviously must have NAT enabled (usually by default).
I've seen networks where the AP's are all connected via their LAN ports and then people wonder why things don't work. You should only have ONE DHCP server per address range. I've worked on networks that had two and that made things an instant mess... (I've seen some pretty Rube Goldberg fixes in my day for bad setup decisions)
Apple's 'extend an existing network' basically turns off NAT and DHCP. Creating a new network uses NAT and DHCP and then the first network has to be on the WAN port. I connect through an Airport Extreme connected to another network. I actually have three AP's due to the size and construction of my house (freaking rebar and thick concrete walls). All are connected through their WAN ports to the main switch and all give different addresses via DHCP and NAT their own address ranges. Everything works great. Today's 'easy to use' networking equipment makes it easy to misconfigure your network...
It's not applicable in this case but you have to be aware that there is a limit for the 'hops' that a network connection can go through. You don't want to put to many layers or to many network routers between your computer and the internet... Each layer, depending on how it functions can add to a lag time and create a 'pinch point' in the connection speed also depending on how many devices connect to it and what they are doing/how much bandwidth they are using. That might be a concern depending on how the layers of the network are used. The farther from the main Internet connection you are in the layers, you might get less bandwidth (a measure of capacity/capability)...