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To: spork <spork@super-g.com>
cc: questions@freebsd.org, David Greenman <dg@root.com>
Subject: Re: de0 problem 2.2-STABLE 
In-reply-to: Message from spork <spork@super-g.com> 
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Date: Tue, 29 Jul 1997 17:10:39 -0400
From: Dennis Rockwell <dennis@bbn.com>
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On 28 Jul, spork wrote:

> de0 <Digital 21140A Fast Ethernet> rev 32 int a irq 12 on pci0:10
> de0: DE500-AA 21140A [10-100Mb/s] pass 2.0
> de0: address 00:00:f8:03:66:e9
> 
> It seems to work fine, unless I unplug the cable.  At that point it logs
> the message "de0: link down: cable problem?"
> 
> I can "ifconfig de0 up" and bring it back, but that would be inconvenient
> if I weren't at the console ;)

I'm also responding to later messages about the link staying
down.

We have a bunch of those cards, too, and it appears that the
driver marks the i/f down without telling the ethernet
common code about it.  For instance, I get the same message,
but "ifconfig de0" still shows UP.  If I "ifconfig de0 down;
ifconfig de0 up" the link comes back up, and all is well.

I haven't checked out the FreeBSD sources, but other Unices
I've worked on shortstop the ioctl at the "ether" level if
the apparent state doesn't change.

Give down/up a shot before you give up on these cards.

I agree that it would be nice if the driver would notice
that the link came back up!  Does it need to probe?

Dennis Rockwell                 dennis@bbn.com
Bolt Beranek & Newman
Systems & Technologies          +1-617-873-5745
Cambridge, MA                   +1-617-873-6091 (Fax)