Welcome to Cisco Support Community. We would love to have your feedback.
For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.
I've heard that you can configure an 1811 router as a terminal server for remote console work.
I have several of them in the lab and would love to try it out.
Has anyone done this?
Easy to do.. just use the AUX port (BTW, this can be done using any Cisco IOS router that has an AUX port). For the 1811, I suggest the following (this is how I normally do it):
! presume you have aaa new-model configured
! suggest making a "none" type of method for login
aaa authentication login my-none none
! configure the aux port
line aux 0
! this is just a sanity setting to force a port release every 60 mins. remove this if you want long lived
! terminal server sessions, or adjust as needed
! this will prevent the 1811 itself from soliciting a login on the reverse telnet session. if you want the 1811
! to enforce a login (aka if you want to protect the attached device via an 1811 based login sequence),
! then adjust this to a different aaa login method. In my case, I enforce login on the attached serial device
! and find having the IOS 1811 doing a login to be a nusiance.
login authentication my-none
! subtle but important step here.. turn off the aux line "exec" processing. if you do not do this, it will still work
! but when you connect, do not be surprised to find a ton of junk coming out... as if the exec is on, the anytime
! the attached device output.. aka inputs to the aux.. then the "exec" will try to process it like an IOS CLI command.
! at minimum, one has to allow telnet (as that is really the only thing that can attach via reverse telnet)
transport input telnet
! adjust this if needed, note 9600 baud is the default so it will not show up
Also suggest the following:
! putting this at the top of the global config will help prevent "hung" sessions. basically if
! someone abruptly disconnects, within 5 mins the reverse-telnet session will be released on the
! 1811. aka, prevents one from having to do tedious "clear line" on the 1811 for a hung reverse-telnet
Once you have this in place.. do a "show line"
Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
0 CTY - - - - - 0 0 0/0 -
1 TTY - inout - - - 0 0 0/0 -
5 AUX 9600/9600 - - - - - 3 0 0/0 -
The AUX port should be line "5" on an 1811. As such, the reverse-telnet port to use for this port is "2005" (aka 2000 + line#). Thus do a telnet to your 1811, but change the TCP port from 23 to 2005.
PS. Expect you realize.. cable should be just a normal "roll over" mod8 cable to go to another Cisco console port.