Dan,
Thanks.
That was a typo from me. It was a con port not an aux port.
Since I only have console ports on switches available, it looks like I can't
do reverse telnet with them. Or can I?
Daniel
From: Dan C [mailto:cdan2154@xxxxxxxxx]
Sent: Donnerstag, 1. Februar 2007 12:50
To: Daniel Kutchin
Subject: Re: Reverse telnet on Catalyst c3560, c3550, c2950 possible?
Hi Daniel,
Did you try to do a show line and clear line 1 confirm and telnet again ? In
my setup I use an access server using asynch ports and works fine with all
switches, my line configs on the Access Server:
line vty 16 29
exec-timeout 0 0
privilege level 15
logging synchronous level all
no login
transport input telnet
and for the ports:
ip host sw2 2011 201.201.1.1
ip host r4 2005 201.201.1.1
ip host r6 2010 201.201.1.1
.............................................
.........................................
interface Loopback0
ip address 201.201.1.1 255.255.255.0
no ip directed-broadcast
I am not sure if you can connect via console ports using just a console
cable, also it looks like you are trying to configure the line aux 0 instead
of line con 0....
Cheers, Dan
On 2/1/07, Daniel Kutchin <daniel@xxxxxxxxxxx> wrote:
Folks,
I can't configure reverse telnet on my catalyst switches to use their
console ports as a terminal server.
Did I miss something, or this is not an available feature on Catalyst c3560,
c3550, c2950 switches?
Here is the well known procedure (at least on Cisco routers):
Say, you want to access switch sw2 (it could be a router as well) via
reverse telnet from sw1.
Join the console ports with a flat Cisco (roll-over) cable .
sw1 |CON|-----|CON| sw2
Don't need to do anything else on sw2 (except to set line-login and enable
passwords)
sw1(config)#line con 0
sw1(config-line)# no exec
sw1(config-line)# transport input all
sw1(config-line)# transport output all
sw1(config-line)# stopbits 1
sw1(config-line)# exit
sw1(config)#
sw1(config)#
sw1(config)# int loopback0
sw1(config-if)# ip add 1.1.1.1 255.255.255.255
sw1(config-if)# end
sw1#
sw1#
sw1# show line con 0
Tty Line Typ Tx/Rx A Modem Roty AccO
0 CTY 9600/9600 - - - -
sw1#
sw1# !-----*----line 0,
sw1# !- then reverse-telnet on sw1-loobpack0 int, port 2000 +0,
sw1# !- to access sw2
sw1#
sw1#telnet 1.1.1.1 2000
sw1# Trying 1.1.1.1, 2000 ...
% Connection refused by remote host
Just for curiosity, I have tried telnet port 2001 and physical interfaces as
well - to no avail.
sw1#telnet 1.1.1.1 2001
Trying 1.1.1.1, 2001 ...
% Connection refused by remote host
sw1#telnet 192.168.0.18 2000
Trying 192.168.0.18, 2000 ...
% Connection refused by remote host
sw1#telnet 192.168.0.18 2001
Trying 192.168.0.18, 2001 ...
% Connection refused by remote host
---
Daniel Kutchin
