Issue in a Terminal server config

Unanswered Question
Apr 2nd, 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!

I have this problem too.
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Makarand Chitale Thu, 04/03/2008 - 15:33

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 Fri, 04/04/2008 - 01:52

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!

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