Re: Problem with Intel 82540EM Gigabit Ethernet Controller

On Tue, Aug 31, 2004 at 11:49:25PM -0700, Gabor Esperon wrote:
> Hi!
> 
> I have an Intel 82540EM Gigabit Ethernet Controller
> working at 100Mb/s on FreeBSD 5-CURRENT and FreeBSD
> 5-BETA3:
> 
> em0:
> flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu
> 1500
>        
> options=1b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING>
>         inet 192.168.1.32 netmask 0xffffff00 broadcast
> 192.168.1.255
>         ether 00:07:e9:09:a7:37
>         media: Ethernet autoselect (100baseTX
> <full-duplex>)
>         status: active
> 
> thats ok, but in both systems I can only get transfers
> at 2.xMb/s (MBytes) as the following "netstat -w1 -I
> em0" show:
>             input          (em0)           output
>    packets  errs      bytes    packets  errs     
> bytes colls
>        782     0      46920       1438     0   
> 2177132     0
>        788     0      53500       1452     0   
> 2209768     0
>        886     0      53160       1628     0   
> 2464792     0
> ...
>
> What could be the problem here?

This looks like a potential duplex mismatch to me.  Please make sure
your hub/switch is running full-duplex.

-- Brooks

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