Salut Petervlan,
t'es sur que c'est pas plutot sur un 1600 ça ?
Moi pur un 800, j'ai plutot ça:


Table of Contents
Troubleshooting
Recovering a Lost Enable Password
Troubleshooting ISDN
Debug Commands
Telephone Interfaces


Troubleshooting
This chapter describes problems that could occur with the Cisco 800 series
router software, reasons for the problems, and steps to solve the problems.
The problems are grouped into the following areas:


Recovering a lost enable password


ISDN


Telephone interfaces

Before troubleshooting a software problem, you must connect a terminal or PC
to the router via the light-blue Console port. (For information on making
this connection, see the Cisco 800 Series Routers Hardware Installation
Guide or the Cisco 811 and Cisco 813 Routers Hardware Installation Guide.)
With a connected terminal or PC, you can read status messages from the
router and enter commands to troubleshoot a problem.

As an alternative, you can remotely access the interface (Ethernet, ISDN, or
telephone) by using Telnet. The Telnet option assumes that the interface is
up and running.

For information on troubleshooting hardware problems, refer to the Cisco 800
Series Routers Hardware Installation Guide or the Cisco 811 and Cisco 813
Routers Hardware Installation Guide.

Recovering a Lost Enable Password
This section describes how to recover a password that you configured with
the enable command (enable password).


------------------------------------------------------------­----------------
----
Note You can recover a lost enable password but not a password that you
configured with the enable secret command (enable secret password). This
password is encrypted and must be replaced with a new enable secret
password. See the "Hot Tips" section on Cisco Connection Online (CCO) for
information on replacing enable secret passwords.

----------------------------------------------------------------------------
----

Follow these steps to recover a lost enable password:


----------------------------------------------------------------------------
----
Step 1 Connect an ASCII terminal or a PC running a terminal emulation
program to the Console port. For more information, see the Cisco 800 Series
Routers Hardware Installation Guide.

Step 2 Configure the terminal at 9600 baud, 8 data bits, no parity, and 1
stop bit.

Step 3 Reboot the router.

Step 4 From the user EXEC mode, display the existing configuration
register value:

Router> show version



Step 5 Record the setting of the configuration register.

The setting is usually 0x2102 or 0x102.

Step 6 Record the break setting.


Break enabled-bit 8 is set to 0.


Break disabled (default setting)-bit 8 is set to 1.


----------------------------------------------------------------------------
----
Note To enable break, enter the config-register 0x01 global configuration
command.

----------------------------------------------------------------------------
----

Step 7 Do one of the following:


If break is enabled, go to Step 8.


If break is disabled, turn the router off, wait 5 seconds, and turn it on
again. Before the terminal displays Boot..., press Escape or Control-C. The
terminal displays the ROM monitor prompt (boot#).
Go to Step 9.


----------------------------------------------------------------------------
----
Note Some terminal keyboards have a key labeled Break. If your keyboard
does not have a Break key, refer to the documentation that came with the
terminal for instructions on how to send a break.

----------------------------------------------------------------------------
----

Step 8 Send a break. The terminal displays the following prompt:

boot#


Step 9 Reset the configuration register:

boot# set ios-conf = 142



Step 10 Initialize the router:

boot# boot [flash]


The router cycles its power, and the configuration register is set to 0x142.
The router uses the boot ROM system image, indicated by the system
configuration dialog:

--- System Configuration Dialog ---


Step 11 Enter no in response to the prompts until the following message is
displayed:

Press RETURN to get started!


Step 12 Press Return. The following prompt appears:

router>


Step 13 Enter privileged EXEC mode:

router> enable



The prompt changes to the privileged EXEC prompt:

router#


Step 14 Display the enable password in the configuration file:

router# show startup-config



Step 15 Enter configuration mode:

router# configure terminal



Step 16 Reset the configuration register:

router# config-register value



Specify the value that you recorded in Step 5 (usually 0x2102 or 0x102).

Step 17 Press Ctrl-Z to exit configuration mode.


----------------------------------------------------------------------------
----
Note To return to the configuration being used before recovering the lost
enable password, do not save the configuration changes before rebooting the
router.

----------------------------------------------------------------------------
----

Step 18 Reboot the router and enter the recovered password.




et ... Voili  Voilou  Voila !

C'était sur un cisco 827,


la différence se joue apparament sur les valeurs de registre sur les 800 0X142 et quelques commandes
Merci pour l'info

Je peux me renseigner sur la CCO cisco si vous voulez.

Si c'est à moindre coup, il faudra se contenter de switchs, tout dépend du nombre de prises nécéssaires.
Je ne crois pas qu'un routeur à base de pc avec x cartes ethernet amèliore leur réseau, au contraire, c'est pas fait pour et plutot à réserver au partage d'un accès distant à relativement basse vitesse.

et ... Voili  Voilou  Voila !