[Cerowrt-devel] 10GigE nics and SFP+ modules?

Dave Taht dave.taht at gmail.com
Wed Sep 10 14:05:45 EDT 2014

On Wed, Sep 10, 2014 at 12:01 AM, Mikael Abrahamsson <swmike at swm.pp.se> wrote:

> I don't like when people create their cable plant to match what GPON needs.
> It's done because of the illusion that long-haul fiber is expensive. It
> isn't, if you have to dig anyway. The difference in cost of a 12 fiber
> cable, and a 1000 fiber cable, isn't huge compared to the digging costs.
> Splicing a 1000 fiber cable isn't huge either. Point-to-point fiber cabling
> is the way to go. If you then decide to light it up using PON of some kind,
> fine, that's up to you, at least you have the flexibility to change
> technology in the future.
>> and several costs there have dropped significantly, routerboard is
>> making a SFP+ capable
>> 5 port switch for like 50 dollars
> URL?

Nick weaver (of ICSI) just turned me onto them -


He also steered me to a nifty port mirroring POE passthrough device:


Haven't tried either yet, personally.

It turns out that both he and I are using the nearly same model nucs
for load testing, with a standard 2.5inch sata 3 slot, and 2 mini pcie
slots for a half length and full length wifi device.

"The D54250WYK1, which is a dual core, dual thread/core i5 based with
16 GB Ram and a 120 GB SSD).  The only disadvantage is it doesn't
include the "Vpro" lights out management suite present in the 3rd gen

I am using the i3 versions. I'd written up a review of the one without
the 2.5 inch slot here:


and later upgraded to the one with the slot, as sata is faster than
msata, and the best wifi (atheros ath9k and ath10k) cards are all full

These have e1000e cards in them, which support BQL under linux 3.6 and
later, and although the (i3 at least) can't drive gigE to saturation
without TSO, they have been quite nice and quite quiet so far, and
have been giving solid results. They are a really good desktop, too,
under linux, and mounting them on the back of the monitor (or, as I
do, on a pegboard), is helpful too.

> --
> Mikael Abrahamsson    email: swmike at swm.pp.se

Dave Täht


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