[CentOS] eth0 killed when adding virtual interface and multiple NICs are present

[JohnS]

On Sat, 2009-04-25 at 20:33 +0200, Kai Schaetzl wrote:
> I have a strange problem on one machine where eth0 gets killed when I add 
> a virtual interface. It's got something to do with the NIC ordering or 
> with the xen network script having a problem with multiple NICs and 
> virtual interfaces. I could need some help/comments on this.
> 
> Some history:
> I added a NIC (chip identifies as Realtek Semiconductor Co., Ltd. 
> RTL8111/8168B PCI Express Gigabit Ethernet) to a Dell R200 server.
> CentOS 5.3 with Xen 3.3.1 (gitco repo). 
----
see this:
http://linux.dell.com/files/whitepapers/nic-enum-whitepaper-v3.pdf

This is a known issue with all Poweredge Servers. It will give you an
explanation and workaround for it.

JohnStanley