On Thursday 15 November 2012 18:36:16 david wrote:

...

Folks

Just for laughs, I tried installing Centos 6.3 on the laptop HP 8540w. Windows 7 installed earlier, but I had to import a driver for the Ethernet controller since it was not supported on the distribution DVD of Windows7.

The Centos installation I chose was the "NetInstall". The installation process identified eth0, I selected IPV4 DHCP, disabled IPV6, and successfully completed the install of "desktop" using the wired connection through my home network. The wireless was turned off. The ethernet controller shows up in Windows with the name "Intel 8255LM".

When the reboot occurred after installation, the Ethernet did not work. The "ifconfig eth0" command showed no IP address. Where do I go from here?

Thanks

David

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At 12:12 PM 11/15/2012, you wrote:

From: Russell Clay1 russclay@gmail.com Organization: google To: CentOS mailing list centos@centos.org Subject: Re: [CentOS] Problem installing 6.3 on HP8540w laptop Date: Thu, 15 Nov 2012 20:07:42 +0000 User-Agent: KMail/1.12.4 (Linux/2.6.32-71.el6.x86_64; KDE/4.3.4; x86_64; ; ) References: 201211151837.qAFIblvY002716@telford.daku.org In-Reply-To: 201211151837.qAFIblvY002716@telford.daku.org MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: 201211152007.42137.russclay@gmail.com

Hello,

Try checking the following:

1. The run level is currently set for networking:

Log in as route, and issue the command 'runlevel'.

# Default runlevel. The runlevels used are: # 0 - halt (Do NOT set initdefault to this) # 1 - Single user mode # 2 - Multiuser, without NFS (The same as 3, if you do not have networking) # 3 - Full multiuser mode # 4 - unused # 5 - X11 # 6 - reboot (Do NOT set initdefault to this)

2. Check the network service

[root@aftp ~]# service network status Configured devices: lo eth0 Currently active devices: lo eth0

To turn the network on, 'service network start'. To make the change permanent, issue the command, 'chkconfig network on'

Also, make sure the the eth0 device is configured properly:

cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE="eth0" BOOTPROTO="dhcp" HWADDR="AA:BB:CC:DD:EE:FF" NM_CONTROLLED="yes" ONBOOT="yes" TYPE="Ethernet" UUID="74b5e66b-267d-4b5e-8188-9e01f24cf69c"

regards

russell

Russell, and Mark:

Here's what I get:

If I do a netinstall and select "Desktop", everything seemed to work out of the box. However, I really didn't want that much software installed, so I tried installing "minimal".

I then get:

Runlevel is N 3 Network Status reveals three configured devices, and active are "lo eth0"

ifcfg-eth0 is as you describe

Performing "service network start" and "chkconfig network on" and a reboot did not solve the problem. eth0 had an ipv6 address, but no inet addr, which means it's not going to work in my home network.

I then added to the file /etc/sysctl.conf the line: net.ipv6.conf.all.disable_ipv6 = 1 and rebooted.

Still no IP address, and when I issued "service network restart" I get: failed: no link present. Check cable?

HOWEVER, pulling the ethernet cable and re-inserting it, then issuing "service network restart" got a valid address. After a reboot, again it didn't work. However, after waiting a while, I tried "network start", got some messages about a file existing, and got an IP address.

This seems strange. But, the computer is now up and accessing the internet for YUM updates.

David