em(4) on FreeBSD is sometimes annoying

Martin nakal at web.de
Mon Aug 4 08:53:45 UTC 2008

Am Sat, 2 Aug 2008 16:01:35 -0700
schrieb "Jack Vogel" <jfvogel at gmail.com>:


> > After I typed "/etc/rc.d/netif restart", I waited until I get
> > "giving up" message. Then I plugged the cable in. After about 30
> > seconds the link LED was on. I noticed that at this point I
> > couldn't get an address using DHCP.
> Well DUH, the agent exited, thats why it said "giving up" :)
> That ain't complex behavior, its behaving as designed.

I'm describing the circumstances WHEN everything happens. I was trying
to show you that even the cable is plugged in you cannot get an IP. The
NIC is in a kind of "dead" state.

> Ya, so the update is slow, the fact that the LED is blinking means you
> have an autoneg failure, so again, its your switch not the NIC.

I have this problem with every kind of switch.

The switch at home is a 100Mbit switch made by Digitus (5-port).

> Let me guess, you have some 100Mb home router and you are trying
> to plug a gig nic into it and forcing the speed maybe?

This is true except for the "forcing the speed" part. It's set to
"media: Ethernet autoselect".

> I asked for a hardware list, now that includes the switch.

Digitus DN-5001C:


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