# [OmniOS-discuss] ixgbe: breaking aggr on 10GbE X540-T2

Stephan Budach stephan.budach at jvm.de
Thu Jan 19 09:27:45 UTC 2017

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    Am 18.01.17 um 17:38 schrieb Stephan Budach:
    > Am 18.01.17 um 17:32 schrieb Dan McDonald:
    >> Generally the X540 has had a good track record.  I brought up the support for this a long time ago, and it worked alright then.  I think Dale has an X540 in-house which works fine too (he should confirm this).
    >>
    >> Some other things to check:
    >>
    >> * Is your BIOS set to map the PCI-E space into the low-32 bits only?  That's an illumos limitation.
    >>
    >> * Do you have other known-working 10GigBaseT chips to try?
    >>
    >> Dan
    >>
    > I will check with the BIOS, altough I thought that this option would
    > simply cause PCI adaptors to vanish from the system, if setup that way.
    > Actually, I have been going with Intel all the time and it has been up
    > to the X540 in 10GbE setups only, when I ever startet to experience
    > issues at all, so Intel has been a natural choice for me ever… ;)
    >
    > Stephan
    I just checked the BIOS of my new Supermicros and I think that this is
    the BIOS option you were referring to…

    Above 4G Decoding: DISABLED

    So, this should be right, shouldn't it?

    Stephan
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