Intel 82598EB twinax cables

Robroy Gregg robroy at
Tue Mar 20 22:43:21 UTC 2018

Good day Dean!

On Tue, 20 Mar 2018, Dean E. Weimer wrote:

> Adapters are Intel 8259EB 10Gigabit AF Dual Port Adapters
> We have Cisco Twinax Cables connecting them to an Avaya VSP 7000 series 
> switch
> However I have been unable to get the interfaces to show any status other 
> than no carrier.
> Am I missing something or is the FreeBSD Driver just not compatible with 
> these Twinax Cables?

Dean, I'll offer a data point which may be helpful.

I have access to a computer with NICs which show up in pciconf -lv as, 
"82599ES 10-Gigabit SFI/SFP+ Network Connection," and whose ports attach 
to a switch using Twinax cabling.

I booted the computer from an 11.1-RELEASE amd64 ISO just now, and I was 
able to bring ix0 up with no problems.

I'm not sure which switch this computer's attached to, but I could find 
out this coming week and report back if that seems like valuable info for 
you (I know that it's either a Cisco or Brocade, so it's different from 
what you're using).

Happy days to you Dean.

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