I've got a MT (on an x86 machine) that I've put in as a hotspot controller to do bandwidth control & authentication on a network. It currently acts as the gateway for all devices on the network and sends all traffic out to a Cisco which controls our T1 to the internet. It has 3 ethernet ports which are all unfortunately plugged into the same switch right now. One is configred on a seperate IP network that it shares with the Cisco for internet traffic, one is used as the gateway for our wireless network and one is for a local lan on site. This was put in place late last week, and since then it appears that every 4 hours (now that I'm logging it, each outage has been every 4-4:20 after the last). The router doesn't crash, and sometimes can be connected to on it's internal ethernet interface from the internet (other times not). It is never able to be pinged on the ethernet port that shares a network with the Cisco. I've temporarily gotten around this by using the Watchdog feature to reboot the MT when it cannot ping the Cisco, and this always clears up the problem (until 4 hours later).
Any ideas what could be causing this? Unfortunately, the device is not local to me, so I want to be pretty sure what I do will fix it so that I don't have to keep making trips out there.