SUMMARY: ndd command

From: Wamala, Muhamudu (Muhamudu.Wamala_at_HRCC.ON.CA)
Date: 07/29/04

  • Next message: Alexandre Déry/dgt/sct: "Routing : How to force outgoing ethernet interface" 
    To: "'sunmanagers@sunmanagers.org'" <sunmanagers@sunmanagers.org>
Date: Thu, 29 Jul 2004 10:00:28 -0400

    Thanks to following gurus who responsed: Aleksander Pavic, Atul Gore,
    William D. Hathaway, Darren Dunham, Osama Omar.

    The answer I was looking for was from William D. Hathaway (see below).
    Thank you again.
    -----------------------------------------------------------------
    >From William D. Hathaway:

    The settings that start with adv_ are capabilities that you advertise to
    the other end of the connection, basically saying you are capable of a
    certain feature. The ones that are like autoneg_cap without the adv_
    are the actual capabilties of the device. People have often chose to
    make a device advertise a subset of the real capabilities if there are
    problems with 2 devices autonegotiating.

    You may want to read
    Sun's blueprint on Ethernet Autonegotiation Best Practices:
    http://www.sun.com/blueprints/0704/817-7526.pdf

    Original message:
    Hi All,

    When you query the driver "/dev/hme" using the ndd command, i.e. ndd -get
    /dev/hme \?, you get a list of parameters that are configuration for that
    driver. What is the difference between the information returned when you
    query the following two sets of parameters:

    adv_autoneg_cap (read and write)
    adv_100T4_cap (read and write)
    adv_100fdx_cap (read and write)
    adv_100hdx_cap (read and write)
    adv_10fdx_cap (read and write)
    adv_10hdx_cap (read and write)

    AND

    autoneg_cap (read only)
    100T4_cap (read only)
    100fdx_cap (read only)
    100hdx_cap (read only)
    10fdx_cap (read only)
    10hdx_cap (read only)

    Thanks.

    Moe

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