Line tty lines and line 66

[asit1111990]

Hello.

i was looking through the configuration on the router and i came across  a term tty in sh line output.

i tried to search many sites but i am confused

Our cisco router and switch has four types of lines

vty--these are lines used when we telnet or ssh from other device

con -used when taking console from laptop

aux--used when used aux input

tty---i did not get why exactly they are used

Correct me if i am wrong

Also i would like to known what is line 66 ?

Thank you!

[Leo Laohoo]

VTY line 66 is used as an psuedo communications between the router and the built-in module.  An example would be 860/880/890 router and the built-in wireless access point would use VTY line 66 to be able to psuedo "console" into the AP (from the router).

[asit1111990]

hi leo,

So on a customer site suppose i have router and a switch . The AP is connected to the switch . If i telnet/ssh from router to the AP i need to configure authentication under line 66.

And another question.. when you say pseudo communication what does it mean? suppose if i telnet from router to AP is it called psuedo communication ? and sometimes we network enginner telnet form switch to AP (connected to  the switch ) is that pseudo communication ?

Thanks!

[Georg Pauwen]

Hello,

the TTY lines correspond to the async ports on the back of your device (the 68-pin connectors). Async1 would be configured under 'line tty 1'.

Check this link for a schematic drawing of the async ports:

http://www.cisco.com/c/en/us/support/docs/routers/3600-series-multiservice-platforms/7258-hw-async.html

Line 66, as far as I recall, means tty line 66 will be accessible by telnet x.x.x.x 2066.

[asit1111990]

Hi gpauwen,

thanks a lot for the reply and the diagram. So basically tty1 handles the authentication for OOB access right ?