Dan Long wrote:
The problem that we are encountering on RHEL 5 is that if we remove the HWADDR from the ifcfg-eth* file, we get random NIC enumeration between reboots. We have 4 NICs (1 on-board (Intel 82545EM), 1 fibre (Realtek 8139), and a dual-nic add-on (Intel 82546GB). Fresh RHEL 5 installation and manually configuring the network settings via ifcfg-eth we would have :
[snip]
We wish to avoid hard coding MAC addresses to the NICs.
We were talking about this here the other day. You obviously know about the issues of hardware discovery changing from one kernel release to another and the whether you do a breadth-first search or a depth-first search.
The particular case we were talking about was that the hardware doesn't do PCI device detection in a deterministic fashion under some circumstances. It's not quite random, but it's variable enough to be vexing. I'm afraid you're stuck with using HWADDR in the ifcfg-eth* files or using a similar device uuid to distinguish one NIC from another. We suspect that this random behaviour will become the norm in future.
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