 | | | Ethernet Probe Order | Ethernet Probe Order 2006-01-05 - By John Reiser
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Ed Wilts wrote:
> Probing the interfaces in any order is as wrong for Ethernet cards as it
> is for disk drives. It's why we have labels for disk volumes and HWADDR
> settings in the ifcfg sripts.
That's a questionable analogy. The analog of HWADDR for an Ethernet card
is UUID (not label) for a ext2/3 filesystem. While mounting by UUID
is possible, most installations prefer labels because they are more
user-friendly. Many Ethernet cards don't even show their [default]
HWADDR anywhere on the card, and especially not on the PCI slot plate.
I just bought a new Linksys LNE100TX; there is no HWADDR label anywhere
except on the cardboard shipping box.
A 10/100 Ethernet cable is a hands-on consumer interface. The rule
"start at CPU, then move down the backplane in slot order" makes
perfect sense. Anyone supporting dozens of two-ported servers
(one port for the WAN, one port for the LAN), each in a different
[school] building miles apart, appreciates this.
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