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Thread: Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

  1. #1
    Join Date
    Oct 2011
    Posts
    70

    Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

    The latest iMac 27 "MacBook Pro has no autonegotiation issue on the switch 5548. show port status" down "and the indicator lamp does not .The device was tested at the stage of bootcamp and load the operating system yet. Attempt with different negotiation mode with the following results:
    Code:
    Auto negotiation : DOWN
    1000f : DOWN
    100f: UP
    100h: UP
    10f: UP
    10h: UP

  2. #2
    Join Date
    Nov 2010
    Posts
    445

    Re: Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

    I am also having the similar trouble with an 82579LM card in a laptop Dell Latitude with a PowerConnect 5524 and 5548P change. Fixing the port speed physically is not a satisfactory explanation to this. I will contact Dell technical support soon.

  3. #3
    Join Date
    Mar 2011
    Posts
    466

    Re: Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

    I have this similar trouble. I called Dell and complained on several occasions, and I have said that any time a firmware update will be released. Updating the drivers on each machine that connects to this device basically makes it completely useless to me. Very disappointed with this purchase. A new MacBook Pro is not very unreasonable to expect a machine to connect without troubles right out of the box, do not understand how it passes quality control.

  4. #4
    Join Date
    Mar 2011
    Posts
    442

    Re: Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

    The trouble is caused by the ESA standard (energy savings). It is packed by the NIC in the laptop / desktop. This standard is not very well defined so different provider implement differently.

    Regarding the next firmware release will allow you to disable PC55xx EEA completely force all other devices do not make use of it too.

  5. #5
    Join Date
    Nov 2011
    Posts
    83

    Re: Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

    Attempted disabling the switch, and have yet succeeded in getting self-working link. Should it be possible in the current firmware to disable this option and have self-link to work appropriately?

  6. #6
    Join Date
    May 2011
    Posts
    315

    Re: Auto negotiated failed with Dell Powerconnect 5548 on Macbook Pro/imac 27

    Quote Originally Posted by Rustagi View Post
    Attempted disabling the switch, and have yet succeeded in getting self-working link. Should it be possible in the current firmware to disable this option and have self-link to work appropriately?
    There is no point going into information of it. New-fangled firmware 4.0.1.11 is obtainable for PC55xx switches. There is an answer to the trouble described. Please update your switches.

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