I have a Cisco 1751 with a DSL interface card. Every time we connect the DSL modem to the router, it appears to sync/bind, then the router appears to lose the connection. The DSL modem has been replaced and verified this morning, so we are suspecting that something is going wrong in the router but are unsure as to how to troubleshoot/diagnose if it is an interface card going bad or not. Need help with this urgently.
Thank you!
