DBott -- Wondering if you have had any luck resolving this issue of the wi-fi drops. I have the AG300H with the DD-WRT built 16519 (DD-WRT v24SP2-MULTI (03/21/11) std) that came pre-installed with this router.
I stupidly replaced Buffalo 300GH router that had the identical problem, expecting that this "better" model would not be plagued by the same wi-fi drop out issue. I've had great experience with Buffalo products in the past, but this has completely shaken my brand loyalty.
As you said earlier in this thread, the router isn't even listed in the dd-wrt.com router database.
I'm ready to take this router out back and run it over with my SUV to extract some amount of satisfaction from the miserable hours of time I have wasted trying to get the SSID to stop disappearing. I posted to http://forums.techguy.org/networking/1039270-buffalo-whr-hp-g300n-wzr.html awhile back. I'll copy/paste what I said there below in case anyone here can throw me a bone to fix this.
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I'm an IT pro that manages the network for a small business. I have read through a couple expired threads here on techguy.org where people are experiencing the same issue that I have. Unfortunately, I don't have any resolution, but am instead throwing this out there in case anyone does have a way to resolve this problem.
The problem has occured with both of the AP/Routers that are listed in the subject. This makes me think it is DD-WRT related and not Buffalo related, but that may not be the case.
The problem is simple: the SSID disappears 1 or more times a day. Sometimes it makes it more than a full day, but then disappears again. It is completely intermittent and there doesn't seem to be any logical reason for it.
* Firmware on the WZR-HP-AG300H is DD-WRT v24SP2-MULTI(03/21/11)
* The device is configured as an Access Point, not a router.
* It has a static IP address assigned
* DHCP Server disabled
* SSID Assigned, WPA2 Personal Mixed wireless security, WPA Shared Key assigned.
* The device is located in the middle of the office in a nice cool area where it in not prone to overheating in any way.
* There are no issues with power as printers/fax machines within 10 feet of the device get their power from the same source.
* The office is not located in a high density area. There are only 2 other SSID's in the area that broadcast and are picked up at this location (owned by other individuals or companies in the vicinity of my office).
When the SSID disappears, I can use a web browser to connect to the device (via wired connection), so although SSID is down (and indeed trying to connect to it by name doesn't work either), the physical ethernet port(s) of are "up". So, I connect to the device, login, go to the Wireless, Basic Settings. Make no changes but click "Apply Settings". Bingo, within 10 seconds, SSID is back and wireless users can connect again. Makes no sense. It's like the wireless side of the device just goes to sleep. Alternatively, I have trained the users to just unplug the device and plug it back in, which solves the problem, for a little while.
Although not a reliable workaround, but it helps with reducing the constant reboots, I have gone to the Administration, Keep Alive tab and enabled Schedule Reboot to reboot everyday at 0600 hours.
I experienced this problem with the WHR-HP-G300N and replaced it with the WZR-HP-AG300H and see now that both models suffer from the exact same problem.
Any ideas to fix or thoughts on troubleshooting welcomed.