[geeks] Four-port PCI Ethernet?

[Joshua Boyd]

On Tue, Jul 06, 2010 at 03:04:38PM -0400, Phil Stracchino wrote:
> I'd expect that ...   I was wondering if it'd show up as four hmes.  A
> dual-EEPro shows up as two separate fxp interfaces.

> (The curious thing is that the two onboard EEPros show up as fxp0 and
> fxp3, while the dual-EEPro shows up as fxp1 and fxp2.  I'm surprised
> that the two onboard EEPros have different PCI version IDs, and thus do
> not show up as fxp0 and fxp1.  It's even more surprising that their PCI
> IDs are different enough that the PCI card shows up *in between* them.)

Some multi-port network cards use multiple single port chips attached to
a multi port PCI -> PCI bridge chip.  I think that is common for Tulip
based devices, as well as some Broadcoms.  I don't know what Intel does,
but if they did the same, that could explain the gap.