I have a DGL 4300 on channel 11 at the front of the house, with an Engenius EOC 1650, configured as an access point on channel 6 wired to it at the back of the house (with a reserved DHCP address); same SSID and security settings; all the firmwares are up-to-date.
The "seamless roaming" was work just fine until suddenly the 3 poor Mac computers (new, 10.6.x) stopped connecting to the Internet from either station. The signal is there, they assure me that they're connected to the correct station, they're listed on my Wireless Client List(s), but they can't connect to anything on the Internet. It almost looks like a DNS problem of some kind.
Rebooting the two routers fixes the problem, but I don't know for how long. Note that the PC (unknown config to me, probably Win 7) doesn't miss a step here just keeps chugging away; and me a lifelong Mac user.
What should I be looking at to keep this from happening?
Background: We run a small B&B. Normally people use the wireless to read their email in the bedrooms, or in the backyard, even, with the Engenius. Suddenly we've got some guy from Toronto using the whole place as some kind of command centre for a (ahem) "major event." He didn't tell me this before he arrived, or I'd have run a wire and switch over to that part of the house. He set up his "office" in the middle, pretty much I guess right where the signals from the two routers overlap, so maybe his fancy iMac got confused as to which ap to connect to. I dunno.
The wife and I, our computers (and the WD Live) are wired through the DGL gigabit switch.