From: Dan C (cdan2154@gmail.com)
Date: Thu Feb 01 2007 - 10:05:55 ART
You will need a 3rd device -- an access server mine is an old AS2511....
cisco AS2511-RJ (68030) processor (revision K) with 14336K/2048K bytes of
memory.
On 2/1/07, Daniel Kutchin <daniel@kutchin.com> wrote:
>
> 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@gmail.com]
> 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@kutchin.com> 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
>
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