How do i know whether my NIC works or not?

[Christian Schult]

Hello arshad,

arshad wrote:

> On Wed, 2009-12-30 at 09:06 +0100, Christian Schult wrote:
> 
> > 
> > The two lines you showed with cat /etc/network/interfaces and i told you
> > to add are not the same. Look again please.
> > 
> > 
> > Christian
> > 
> 
> My bad, its way to different.
> Thank you Christian for pointing out that.
> here is the new output (i still cant connect to router page)
> 
> $ sudo ifdown eth0
> ifdown: interface eth0 not configured
> arshad at arshad-desktop:~$ sudo ifup eth0
> Internet Systems Consortium DHCP Client V3.1.1
> Copyright 2004-2008 Internet Systems Consortium.
> All rights reserved.
> For info, please visit http://www.isc.org/sw/dhcp/
> 
> Listening on LPF/eth0/00:e0:4d:af:6e:4f
> Sending on   LPF/eth0/00:e0:4d:af:6e:4f
> Sending on   Socket/fallback
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 18
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 16
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 2
> No DHCPOFFERS received.
> No working leases in persistent database - sleeping.

Well, no dhcp server answered. Maybe because dhcp is turned off in your
router config. We'll give your eth0 interface a fixed setup without dhcp.

Edit /etc/networking/interfaces as root.
Comment out the lines belonging to eth0 (those lines i gave you in my
previous mail).

Take care that empty lines segregate each interface setup from the others.

Add this to /etc/networking/interfaces

iface eth0 inet static
    address 192.168.1.42
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255


Your /etc/network/interfaces now looks like this:

$ cat /etc/network/interfaces

auto lo
iface lo inet loopback

#auto eth0
#iface eth0 inet dhcp

iface eth0 inet static
    address 192.168.1.42
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255

After you saved that file, again do

$ sudo ifdown eth0
$ sudo ifup eth0

Can you point your webbrowser to http://192.168.1.1 now?
Can you ping your router:

$ ping 192.168.1.1

Can you access internet now? Send us the output of /sbin/ifconfig again.


Christian