Re: dhcpcd, carrier and RTM_INFO

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

> An interface that is administratively down (no IFF_UP flag) means
> that the operator/etc. has asked that it not do anything, so if you
> find no IFF_UP but positive carrier status that sounds like a bug (in
> the driver).

Then I suspect we have lots of buggy Ethernet drivers.  Certainly my
experience and expectation is that the driver's reporting of media
sense (link, speed, duplex, etc) is orthogonal to IFF_UP (though some
interfaces have to be brought up at least once for media sensing to
work, even if they're later brought down again).  I also think that's
the most useful way, too, in that it makes available information which
is not available under the scheme you outline.

> But maybe I'm confused and down interfaces report carrier but do
> nothing else.

Yeah, that.

> Still, without IFF_UP I would ignore the interface.

Agreed, no question there.

/~\ The ASCII                             Mouse
\ / Ribbon Campaign
 X  Against HTML                mouse%rodents-montreal.org@localhost
/ \ Email!           7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B