On Thu, 24 Feb 2000 20:05:09 +0100, Pedro M. Rodrigues wrote:
> Hello all! This may be off-topic, but does anyone has experience
> with 4 port ethernet cards in Linux? How good are their drivers, are
> they open-source and do they provide channel bonding with any
> kind of switching equipment? I´ve seen Phobos sell some with
> Linux support, but now they seem to just license the technology to
> OEM´s.
We have a machine with a Cogent EM110 (IIRC) 4 port ethernet card running
for almost two years now. There are four DEC DC21140 chips on the card,
and the standard tulip driver recognizes them without a problem.
Here is the relevant output from /proc/pci:
Bus 2, device 4, function 0:
Ethernet controller: DEC DC21140 (rev 34).
Medium devsel. Fast back-to-back capable. IRQ 9. Master Capable. Latency=165. Min Gnt=20.Max Lat=40.
I/O at 0xec00 [0xec01].
Non-prefetchable 32 bit memory at 0xfe7ff800 [0xfe7ff800].
Bus 2, device 5, function 0:
Ethernet controller: DEC DC21140 (rev 34).
Medium devsel. Fast back-to-back capable. IRQ b. Master Capable. Latency=165. Min Gnt=20.Max Lat=40.
I/O at 0xe880 [0xe881].
Non-prefetchable 32 bit memory at 0xfe7ff400 [0xfe7ff400].
Bus 2, device 6, function 0:
Ethernet controller: DEC DC21140 (rev 34).
Medium devsel. Fast back-to-back capable. IRQ 9. Master Capable. Latency=165. Min Gnt=20.Max Lat=40.
I/O at 0xe800 [0xe801].
Non-prefetchable 32 bit memory at 0xfe7ff000 [0xfe7ff000].
Bus 2, device 7, function 0:
Ethernet controller: DEC DC21140 (rev 34).
Medium devsel. Fast back-to-back capable. IRQ a. Master Capable. Latency=165. Min Gnt=20.Max Lat=40.
I/O at 0xe480 [0xe481].
Non-prefetchable 32 bit memory at 0xfe7fec00 [0xfe7fec00].
Bus 0, device 15, function 0:
PCI bridge: DEC DC21152 (rev 2).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=64. Min Gnt=4.
As you can see the card seems to come with an onboard PCI-PCI bridge, but
I'm not gonna open the box to check it ;-).
Cogent has been bought by Adaptec at the time we got the controller, and
I'm not sure if Adaptec still sells this particular model.
I don't know if the card supports channel bonding: we use it to make
dedicated links to compute servers.
Erik
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