Issue in a Terminal server config

omal · ‎04-02-2008

Hi

I am configuring a 2511 as a terminal server. I have two 2511s. One 2511 is OK. The other one gives me an error when I try to paste the same configuration that I have in notepad.

For the command:

line 1 16

modem InOut

it says that, "line 2 does not support modem control"

Then I typed:

(config)#line 0 17

(config-line)#modem InOut

it says, "line 0 does not support modem control.

Now it doesn't talk about line 2, instead it says that line 0 does not support modem control.

In here, the main problem is that, when I type:

(config)#line 1 16

(config-line)#no exec

and when I telnet, the router doesn't even prompt for anything. But when I again say, "exec" in line mode, then the router prompts me for the username.

But when I enter the username, it says:

traying 192.168.1.1, 2001.....

Destination unreachable; gateway or host is down.

Below I will paste the configuration that works in the other 2511 router.

line con 0

logging synchronous

login

transport input none

line 1 4

session-timeout 20

no exec

exec-timeout 0 0

no flush-at-activation

logging synchronous

modem InOut

transport input all

line 5 16

session-timeout 20

no exec

exec-timeout 0 0

no flush-at-activation

modem InOut

transport input all

line aux 0

password xxx

logging synchronous

login

line vty 0 4

exec-timeout 20 0

logging synchronous

login local

line vty 5 15

exec-timeout 20 0

logging synchronous

login local

!

In this setup, I have a loopback interace configured. Basically, everything is OK. The only difference are these two commands don't work like in the 1st router:

no exec

modem InOut

A very confusing scenario.

Any help on this would be highly appreciated.

Thanks in advance!

Makarand Chitale · ‎04-03-2008

Response marked with

line 1 16

modem InOut

it says that, "line 2 does not support modem control"

- can you please try only one line at a time, that is:

line 1

modem inout

then try line 2 and so on and see if we see errors for specific lines only (which we can investigate further)

Then I typed:

(config)#line 0 17

(config-line)#modem InOut

it says, "line 0 does not support modem control. Now it doesn't talk about line 2, instead it says that line 0 does not support modem control.

This error is ok since line 0 is console and does not support modem control, mind you IOS spills out errors one after another so probably would have given error for line 2 next.

In here, the main problem is that, when I type:

(config)#line 1 16

(config-line)#no exec

and when I telnet, the router doesn't even prompt for anything. But when I again say, "exec" in line mode, then the router prompts me for the username.

Do you mean reverse telnet out of these lines? Not sure I understand what you are trying to do here.

A few things to check:

1. Is the router completely up, means its not in boot mode etc.

2. Are the IOS images different or same on the working vs non working 2511?

Thanks, Mak

omal · ‎04-04-2008

Hi Mak

Thanks a lot for your post.

I tried giving line by line and started with

line 1

and pasted the configuration

session-timeout 20

exec-timeout 0 0

no flush-at-activation

logging synchronous

modem InOut

transport input all

Then I tried

line 2

then I got the same error.

About 'no exec'

in line 1 16

when I say:

(config-line)#no exec

I can't even telnet to the router. Not the reverse telnet. But the moment I remove it and say, 'exec', then I can telnet and login to the router.

With 'no exec' when I go to DOS prompt and telnet, it tries to telnet, and it is suppose to prompt me for the username (because in line vty, I say, login local, and I give a username and password in global mode) but nothing prompts and the screen closes in a few seconds.

Yes the router is functional. And it has exactly the same IOS as the other one which is working without any problems :(

A really terrible situation.

Thanks a lot in advance for your help!