I have a cisco 831 that is configured for pppoe(dsl modem in bridge mode). It has been running fine for a couple months now, but just in the last few days, my eth1 interface connected to the dsl modem keeps bouncing 2 or 3 times per hour. The light for the eth1 int on the front of the unit actually goes off and on. Also when this happens the LAN side shuts down and I cant ping it from the inside(lights stay on). I have taken it out of service for testing now. I have it reconfigured for basic dhcp from a cable modem. It hasn't crapped out yet and its been downloading steady for about 45 minutes.
Attached is my config for the router in pppoe mode. Can someone tell me if there is a problem with it?