In fact, channel bonding and fault tolerance is the most important
thing i want from a quad port ethernet card. It=B4s no use at least
in my case to upgrade a network infrastructure to switched
equipment just to have people access s erver through a small
straw. :) Gigabit ethernet is our of the question for now.
Pedro
On 24 Feb 00, at 22:40, Erik Mouw wrote:
> 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
>
> --
> "God. Root. What is difference?"
> -- Pitr in "User Friendly" by Illiad
>
>
>
>
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