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Reverse telnet problem from 1841

CSCO12241031
Level 1
Level 1

                   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

1 Reply 1

turfsniffer0
Level 1
Level 1

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)