issues with Intel Pro/1000 and 1000baseTX

Steven Hartland killing at
Fri May 15 16:26:18 UTC 2009

Never only set one end manually, always set both the machine and the


----- Original Message ----- 
From: "James Tanis" <jtanis at>
To: "FreeBSD Questions" <freebsd-questions at>; <freebsd-stable at>
Sent: Thursday, May 14, 2009 4:12 PM
Subject: issues with Intel Pro/1000 and 1000baseTX

>I have a FreeBSD v7.0 box it has two Intel Pro/1000 NICs, the one in 
> question is:
> em1: <Intel(R) PRO/1000 Network Connection Version - 6.7.3> port 
> 0x2020-0x203f mem 0xd8060000-0xd807ffff,0xd8040000-0xd805ffff irq 19 at 
> device 0.1 on pci4
> what we get after boot is:
> mtu 1500
>        ether 00:30:48:xx:xx:xx
>        inet netmask 0xffffff00 broadcast
>        media: Ethernet autoselect (100baseTX <full-duplex>)
>        status: active
> The problem is that the NIC refuses to connect at 1000baseTX.
> It's connected to a HP Procurve 1700-24 switch which supports 1000baseTX 
> on ports 23 and 24. This particular computer is connected on port 24. I 
> have a much older end user system which uses the same card (but earlier 
> revision), runs Windows XP and is plugged in to port 23. The end user 
> system has no problem connecting at 1000baseTX. I have of course tried 
> switching ports.
> Attempting to force 1000baseTX via:
> ifconfig em1 media 1000baseTX mediaopt full-duplex
> gets me:
> status: no carrier
> After forcing the NIC to go 1000baseTX the LEDs on the backpane are both 
> off. I can only come to the conclusion that this is a driver issue based 
> on previous experience and the simple fact that the end user system is 
> capable of connecting at 1000baseTX. Anybody have any suggestions? I'm 
> hoping I'm wrong. I'd rather not do an in-place upgrade, this is a 
> production system and the main gateway for an entire school, when I do 
> not even know for sure whether this will fix the problem. It's worth it 
> to me though, having a 1000baseTX uplink from the switch would remove a 
> major bottleneck for me.
> Any help would be appreciated.
> -- 
> James Tanis
> Technical Coordinator
> Computer Science Department
> Monsignor Donovan Catholic High School
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> freebsd-stable at mailing list
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