While trying to r-telnet from the AUX port of a 2811 router to the Console port of a 1751 router, I get prompted for user name and password. If I have just reloaded the router, I can see the boot messages during the r-telnet session. Once the 1751 fully boots, my session locks up and I have to Ctrl+Shift+6+x myself out of it. I've cleared the line several times and tried different configurations and cable types on both ports. Speeds on both ports are set to 9600. I am currently using the following configuration with a rollover cable:
2811 ROUTER
interface Loopback0
ip address 172.16.1.1 255.255.255.0
line aux 0
modem InOut
transport input all
transport output all
1751 ROUTER
line con 0