Gigabit Ethernet adapter problem

Paul Pathiakis pathiaki2 at
Tue Oct 31 17:41:33 UTC 2017

I have multiple versions of all these cards.  There doesn't seem to be 
any issue with auto detection.

Also, I have seen it step down to 100 Mb on a bad cable or, of course, 
trying to talk to 100 Mb connection like a bad switch port or a switch 
that doesn't support Gb. (so, behaving like it should...)

If you're going card to card, make sure they are both Gb capable.

So, I'd check both end points and the cable as a first step. (All my 
cables are at least cat 5e to support Gb - although I have some well 
made 5 cables that do support Gb negotiation but I can't seem to push 
them beyond 700 Mb with these adapters *shrug*)


On 10/31/2017 11:24, Ernie Luzar wrote:
> em - Intel(R) PRO/1000 Gigabit Ethernet adapter driver
> The boot messages show the Gigabit Ethernet adapter is correctly 
> identified at boot time as shown below.
> em0: <Intel(R) PRO/1000 Network Connection 7.6.1-k> port 0xf080-0xf09f
>      mem 0xf7d00000-0xf7d1ffff,0xf7d3c000-0xf7d3cfff irq 20 at
>      device 25.0 on pci0
> em0: Using an MSI interrupt
> em0: Ethernet address: d0:50:99:93:75:98
> em0: netmap queues/slots: TX 1/1024, RX 1/1024
> But after the system is up and running ifconfig em0 shows
>         metric 0 mtu 1500
>         TSO4,VLAN_HWTSO>
>     ether d0:50:99:93:75:98
>     hwaddr d0:50:99:93:75:98
>     inet netmask 0xff000000 broadcast
>     media: Ethernet autoselect (100baseTX <full-duplex>)
>     status: active
> and we see that (100baseTX <full-duplex>) has been selected as default 
> and it should be (1000baseTX <full-duplex>).
> How do I force the Ethernet adapter into Gigabit mode?
> _______________________________________________
> freebsd-questions at mailing list
> To unsubscribe, send any mail to 
> "freebsd-questions-unsubscribe at"

More information about the freebsd-questions mailing list