On 4 July 2016 at 22:09, Russell Coker via luv-main <luv-main(a)luv.asn.au> wrote:
One of my clients is getting a server that is not
going to immediately have
10GigE but will probably have it in the not too distant future. Which of the
following 10GigE cards from Dell would be most suitable?
Note that the 10GigE switch is yet to be purchased. Some of these cards
appear to use fiber and some use twisted-pair. Obviously buying a network
adapter now is going to constrain the choice of switches in the future.
Any suggestions?
I think that:
Fibre usually means long distances 400m to 10Km.
Direct attach is very short connecting SFP+ slots together 6m?
10G Base-T is Cu (Cat -6a needed for full 100m range)
https://en.wikipedia.org/wiki/10_Gigabit_Ethernet#10GBASE-T
but Cu is usually cheaper all round and gets cheaper. I believe it is
still pretty hot but expectations are it will get cheaper/cooler as
technology improves in the next few years.
So if you are just connecting machines around an office - go Copper -
if you are terminating a external link from another building/site- go
SFP+
Often the bigger switches will be mostly Cu base-T with some SFP+ for
the main connecting links.
Some run Linux!
https://cumulusnetworks.com/cumulus-linux/overview/
Interested in other opinions.
Andrew