I have come to realize that not all access points are created equal. So, I'd like to parse the space into sets of capabilities and, with limited experience, could use inputs:
- there are access points with NO DHCP server. I would characterize them as "a switch with a radio".
The Cisco WAP321 is an example I believe.
- there are access points with a built-in DHCP server. So, "a switch with a radio with a DHCP server".
The DLink DWL3200AP and DAP-2360 are examples.
- then there's the Router-as-an-Access-Point approach which is also "a switch with a radio with a DHCP server".
Just about any commodity router will fit this description (with the WAN not connected).
In the latter case we generally recommend that the router-as-an-access-point have DHCP turned OFF so it doesn't conflict with the network's (generally wired) DHCP server.
In the first case, there's no issue or question.
But, in the middle case, I'm reading that the access point will provide addresses with its DHCP to "wireless clients". This implies there is isolation between the DHCP server and the ethernet port. Is that true?
If so, does this mean that one might run two, isolated DHCP servers? One for wired clients and one for wireless clients (assuming the simplest possible arrangement)?
It's a little hard for me to imagine that the wireless clients would be isolated from the "wired" DHCP server and still connect to everything else on the wired network.