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    SubjectRe: [OT] 4 port ethernet cards in Linux?
    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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