I have a number of 1600 routers which uses isdn to connect to a central router which is also cisco 1600.Lately, few of them times out and status down after about two minutes for no reason. I have checked the obvious like idle timeout and Bri0 interfa...

I am trying to configure SNMP on 3600 series router version11.12. It is meant be be accessed through MRTG, but it has not been successful. Other cisco switches are working fine. Any suggestion will be appreciated.