I have 2 Asus RT-N12's: one as my main access point and one in wireless bridge mode connected to my PC. For normal internet usage patterns, the connection between the two is rock solid. More intensive tasks such as streaming HD video or even using speedtest.net will sometimes cause the bridged router to lock up, though. Downloading a large file hosted on another computer connected to my AP by LAN cable will reliably reproduce the problem within seconds as the speed starts to ramp up towards 5-6 MB/s.
After this happens, the router becomes inaccessible from the web GUI or telnet. The wireless light becomes solid blue, but the lan light continues to flicker like there's activity. I have to hard reset the router for it to start working again.
There are no problems with the AP. Doing the same LAN file download on a laptop connected wirelessly to the AP works just fine.
I am using WPA2-PSK with AES encryption, but the problem persists if I turn security off entirely. I have the AP set to Auto wireless mode, and it is connecting at N speeds. My Channel width is 20 MHz. If I force the AP into G-only mode, the router does not crash, but I don't know if that's just because the speed topped out around 2 MB/s in that case.
I am using "Tomato 1.28.9052 MIPSR2-beta23 K26 Std". I tried remote logging, but I didn't see anything out of the ordinary. Watching "top" while I did the download shows this:
Mem: 13368K used, 16412K free, 0K shrd, 1608K buff, 4788K cached CPU: 0% usr 0% sys 0% nic 41% idle 0% io 2% irq 55% sirq Load average: 0.05 0.02 0.00 2/28 524
Please let me know what other information might be helpful or if anyone has any thoughts on what I can do to help debug this.