Does the new iMac support Jumbo frames?

Discussion in 'iMac' started by b0redom, May 5, 2011.

  1. b0redom
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    macrumors regular

    May 4, 2007
    As subject. I was pretty peeved to find out my 2010 version didn't!
  2. b0redom
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    thread starter macrumors regular

    May 4, 2007
    Cool, so the answer is 'probably'. :) I'd be interested to know if anyone who has one can verify.
  3. mpe
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    macrumors regular

    Sep 3, 2010
    At least mine doesn't:

    imac:~ MPE$ sudo ifconfig en0 mtu 9000
    ifconfig: ioctl (set mtu): Invalid argument
  4. pmd
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    macrumors member

    Jan 14, 2004
    Melbourne (Previously UK)
    Yes, the 27" does.

    Weird. My 27" 3.1GHz iMac that was delivered yesterday supports jumbo frames fine. I was quite concerned that it wouldn't because I rely on them for good performance with my NAS :)

    I set it using System Preferences -> Ethernet -> Advanced -> Ethernet -> Configure Manually.

    I've confirmed the setting by checking the output of ifconfig. It shows an mtu value of 9000.


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