issues with Intel Pro/1000 and 1000baseTX

Nenhum_de_Nos matheus at
Fri May 15 21:01:39 UTC 2009

On Thu, May 14, 2009 12:53, Tim Judd wrote:
> On Thu, May 14, 2009 at 9:12 AM, James Tanis <jtanis at> wrote:
>> 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
> I'm going to point the finger at the possibility of the Ethernet cable
> itself.
> Gigabit link requires CAT5e or better (CAT6).  A CAT5 alone is NOT enough
> to
> give gigabit speeds.  Check the markings on the cable, replace if it's not
> a
> 5e or 6 and try again.  This includes the discussion of proper terminating
> and twist requirements.

I know this is a bit off, but as I never had CAT6 stuff to deal with here
it goes. is there any problems in using CAT6 cabling and not 1000baseTX
capable switch ?

I plan to install cat6 cables and just use 1000baseTX in future. this will
be my new home network and all I have now is 100baseTX and two 1000baseT



We will call you cygnus,
The God of balance you shall be

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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