I'm having a little trouble understanding the output I'm seeing from kstat for the "net" class. I'm seeing a lot of entries with "mac" as the name, like this.

module: bge                             instance: 3     
name:   mac                             class:    net
        adv_cap_1000fdx                 1
        adv_cap_1000hdx                 1
        adv_cap_100fdx                  1

i'm not sure if they refer to the media access control or the medium access controller. my guess its the latter as net would probably define the hardware its running on. i'm wondering if someone who has a ring network will show a class of ring.

These kstat entries are provided by the new networking framework (project nemo, module mac for media access layer). They indeed duplicate statistics available with the legacy ethernet older one.

"module bge / instance 3 / name mac" more or less replace "module link / instance 0 / name bge3".

Thanks for the replies!

The project name led me to the design document for Project Nemo on the OpenSolaris website, which gave me a wordier explanation of what jlliagre had already said. Looks like I've got my answer.

Now I just have to figure out what to do with it.