Cisco 800 routers series have a hardware particularity for the auxiliary port witch is in the same physical interface as the console port.
my issue is to use the aux port to setup reverse telnet in a cisco 881G, running the IOS version 12.4(22)T1 (fc5).
sh run Output:
line con 0 exec-timeout 0 0 modem enable no exec transport preferred none transport output all stopbits 1 flowcontrol hardware line aux 0 exec-timeout 5 0 password cisco1 login modem InOut modem autoconfigure discovery no exec transport input all
transport output all stopbits 1 flowcontrol software
a loopback interface has been configured and is up.
The problem is when i telnet the loopback addresse, port 2001 (where 1 is the aux tty number) i get :
according to Cisco doumentation you need to enter the following command:
line con 0
This is because the AUX and Console port are the same physical interface and one can only be active at a time. You have to effectively disable the console port by entering "modem enable" by which then enables the AUX port (for modem or reverse telnet).
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