> After the latest lot of kernel security updates have come out, I updated one
> of my colo boxes and rebooted. It didn't come back up and fails when booting
> on:
>         * CPU Microcode update
>         * iptables
>         * eth0
>
> The booting process completes, however as you can imagine, there is no
> network connectivity at all. The only config changes were installing the new
> kernel. Booting back into 2.6.18-8.1.8.el5 make things work 100% again.

I also got this type of probles once before. pls check initrd image.
pls performe below steps.

 gunzip -cd /boot/initrd-2.6.18-8.1.8.el5.img |cpio -t |more and see

then, check your newly installed kernel. as below

 gunzip -cd /boot/initrd-2.6.18-53.1.13.el5.img |cpio -t |more and see

pls check what is missing. If found, All you have to make an initrd by
using mkinitrd command.

pls check below URL

http://readlist.com/lists/centos.org/centos/2/13952.html

-- 
Thank you
Indunil Jayasooriya
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