SUMMARY: ndd command

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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