03-22-2013 12:06 PM
Hi Guys
I have been going crazy trying to get a reverse telnet session from my 1841 aux port to another 1841 console port and am hoping someone can advise me as to what to try next.
Physically i am set up with a rollover cable (1 - 8, 2 - 7 etc) from the aux port of one router to the console of another (both 1841's) i have tested this with my cable tester so i know this is not the problem.
Here is my version info
Cisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 12.4(7d), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 03-Jan-07 19:14 by alnguyen
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
R_FAN uptime is 21 minutes
System returned to ROM by reload at 18:48:52 UTC Fri Mar 22 2013
System image file is "flash:c1841-ipbase-mz.124-7d.bin"
My config is as follows
ip host router 2001 1.1.1.1
interface Loopback0
ip address 1.1.1.1 255.255.255.255
line aux 0
no exec-banner
modem InOut
no exec
transport preferred none
transport input all
transport output telnet
my aux line is on line 1 so i am entering telnet 1.1.1.1. 2001
R_FAN#show line
Tty Line Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
0 0 CTY - - - - - 0 0 0/0 -
1 1 AUX 9600/9600 - inout - - - 0 0 0/0 -
* 194 194 VTY - - - - - 1 0 0/0 -
195 195 VTY - - - - - 0 0 0/0 -
196 196 VTY - - - - - 0 0 0/0 -
197 197 VTY - - - - - 0 0 0/0 -
198 198 VTY - - - - - 0 0 0/0 -
Line(s) not in async mode -or- with no hardware support:
2-193
And here is my result
R_FAN#telnet 1.1.1.1 2001
Trying 1.1.1.1, 2001 ... Open
if i then manually reboot the router to which i am trying to rev telnet to, i can see all the boot process fine but i cannot reach the "command prompt"
I have opened a hyper terminal session on my laptop and connected to the aux port and when i do this what ever i type is being inputted onto the router i reverse telnetted from but if i type from the router i am rev telnetting from i don't receive anything on my laptop.
So i have opened the session but i am unable to input any commands and only way to get back is to ctrl shift 6 x and clear the line.
This to me indicates i am getting traffic flow in one direction only is there any other configuration i am missing or is there a known ios bug ?
Any advise would be greatly appreciated
Graham
04-08-2013 05:40 AM
Hi Graham,
Try the following config for the Aux port (remove what you've already applied):
Line Aux 0
modem InOut
no exec-banner
transport input all
transport output all
stopbits 1 (default is 2)
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