A cisco router used as you said is wasted and useless.
You should instead set the modem in bridge mode, and let the router do the router. There are many threads on the subject.
Anyway an enterprise-class Cisco router is not apt as home or user-friendly device so unless you are prepare to sped a lot of time studying and trying, and receive much aggravation, maye it's better that you gave up on it.
i need to do the same thing, connect a 876 Cisco router with an existing ADSL modem. The reason is that the router itself cannot synchronize with the DSL line due to very bad condition of the telephone lines.
We found a modem that is probably more 'sensitive' and can synchronize, so i would like to connect it with the Cisco router.
I have read somewhere that i have to connect the modem to the console or AUX port of the cisco router using a rollover modem cable. Is that true? Can i connect the two devices through ethernet, and how?
I need the authentication done by the router.
Can you please help with the configuration? I have some experience with cisco router configuration.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...