 | | | Ethernet Probe Order | Ethernet Probe Order 2006-01-06 - By Brian Long
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On Thu, 2006-01-05 at 17:09 -0500, Ed Griffin wrote:
> I am curious, as I have googled this to death, how to force a system to
> have the motherboard card be eth0 and eth1. My configuration is as
> follows, a Dell PowerEdge 1850 with an add-on Intel Pro 1000 Quad Port
> card. The quad port card gets found first and becomes eth0 through eth3
> and the motherboard cards end up as eth4 and eth5. This has caused some
> problems during kickstarts and the like. I am sure there is something I
> can pass via grub to the initrd to get this to go to the motherboard
> first but I just can't seem to decipher it. The weird thing is that on
> a RHEL4 box it seems to behave the opposite, or to be more specific the
> way I want it to.
Ed,
Just another point to note: depending on whether you are running RHEL 3
i386 or x86_64, the probe order changes. Arjan explained this about a
year ago. It's because the i386 kernel in RHEL 3 does not use ACPI for
probing bus order, but the x86_64 kernel does. x86_64 kernel can use
ACPI by default because they know all x86_64 motherboards support it.
They do not know this for all i386/i686 motherboards, so they stuck with
the other method (forget what it is).
On RHEL 4 with 2.6 kernel, both i386/i686 and x86_64 kernels probe in
the same order.
We have over 500 servers from a certain vendor that uses mainstream Tyan
2881 motherboards. The onboard ports change order (eth0, eth1)
depending on if you load RHEL 3 i386 or x86_64. What a pain in the
butt! We got around this with hardware profiles in our make_bootdisk
perl CGI (http://kickstart-tools.sf.net). If someone selects that
vendor's system for installation, we alter the ksdevice line in
syslinux.cfg depending on if they choose a i386 or x86_64-based
distribution for installation.
/Brian/
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Brian Long | | |
IT Data Center Systems | .|||. .|||.
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