I presume the network interface is on the motherboard. Is it enabled in 
the bios? If so, my guess is that it's bad/fried. You might try booting 
Knoppix to confirm. I think I'd buy a $10 PCI Nic at Fry's Electronics. 
I've used the Trendnet cards for a number of years, with nary a problem.

On 09/22/2011 05:57 PM, James Dugger wrote:
> I have tried to install CentOS 6 on an older system.  When I get to the
> prompt screen for the hostname of the computer there is a configure
> network button at the bottom of the screen which is non selectable.
> After filling in the hostname for the machine the configure network
> button is still unelectable.  Without being able to select the button I
> continued and completed the installation of the CentOS 6 on the system,
> but when done with installation I have no internet connection.
>
> I see the network connection icon in the upper right hand corner of the
> status bar in Gnome, and when I right click edit connections, I see Auto
> eth0 in the connections screen last used is never.  When I highlight it
> and click edit I can see a MAC address listed.  in IPv4 and in IPv6
> method is set to Automatic (DHCP).  Connect Automatically box is checked
>   and it is available to all users.  Still no internet connection
>
> ifconfig gives the following info:
>
> eth0
>
> Link encap:Ethernet HWaddr: 00:13:20:BF:DA:56
> inet addr:192.168.0.103 Bcast:192.168.0.255 Mask:255.255.255.0
> inet6 addr: fe88::213:20ff:febf:da56/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:721 errors:0 dropped:0 overruns:0 frame:0
> TX packets:222 errors:0 dropped:0 overruns:) carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:59817 (58.4 KiB)  TX bytes:21873 (21.3 KiB)
> Interrupt:16
>
> lo
>
> Link encap:Local Loopback
> inet addr:127.0.0.1 Mask 255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Mertric:1
> RX packets:12 errors:0 dropped:0 overruns:0 frame:0
> TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:720 (720.0 b) TX bytes:720 (720.0 b)
>
> ------------
>
> resolve.conf has the following:
>
> # Generated by NetworkManager
> nameserver 192.168.0.1
>
> (the IP address listed in resolve.conf is my router's gateway address)
>
> There was no ifcfg-eth0 file created in
> /etc/sysconfig/netwroking/devices  so I created one and put the
> following in it:
>
> DEVICE=eth0
> BOOTPROTO=none
> HWADDR=00:13:20:BF:DA:56
> ONBOOT=yes
> TYPE=Ethernet
> USERCTL=no
> IPV6INIT=no
> PEERDNS=yes
> NETMASK=255.2555.255.0
> IPADDR=192.168.0.10
> GATEWAY=192.168.0.1
>
> --------
>
> after this I have brought eth0  down and back up using if down eth0 and
> ifup eth0
>
> I get an OK on the following:
>
> Shutting down loopback interface:
> Bringing up loopback interface:
> Bringing up interface Auto_eth0:  Active connection state: activating
> Active connection path:
> /org/freedesktop/NetwokManager/ActiveConnection/2 state: activated
> Connection activated
>
> Still no internet connection.  Please help, Thanks
>
> --
> James
>
>


-- 
-Eric 'shubes'

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