And don't forget that the switches that are XFP and SFP+ sometimes (usually?) don't include the optics for each port in the switch price.
With CX4, all you need is a cable, if you're within a few meters. > Yes - that list is years old. > Those Fujitsu and HP switches have been tested with the CASPER hardware > and found to work as advertised. > > There are lots of new products available. More announced > all the time. We are in contact with a number of vendors in > hopes of getting demo units to try in house with the CASPER > hardware before listing them as recommended for use. > Our tests will include running at full line rates all ports continuously > as that's what our intended applications require. > > Less demanding applications will have many more, and > cheaper, options for suitable switch vendor and model. > > I have no prediction for when I will be able to add more switch > models will to that list. > > Matt > > On Thu, 5 Aug 2010, Andrew Lutomirski wrote: > >> On Thu, Aug 5, 2010 at 3:21 PM, Matt Dexter <[email protected]> >> wrote: >>> Hi Tom, >>> >>> were you aware of these ? >>> http://casper.berkeley.edu/wiki/Recommended_10_GbE_Hardware >> >> Sadly the list is out of date: some of the switches are no longer in >> production. The XG700, for example, is great and cheap but you can't >> buy one without great difficulty. >> >> I'm not sure that manufacturers really care about CX4 anymore now that >> SFP+ parts are available. >> >> --Andy >> >>> http://casper.berkeley.edu/wiki/Equipment_Cables >>> Matt Dexter >>> >>> On Thu, 5 Aug 2010, Tom Downes wrote: >>> >>>> Casper-folks: >>>> >>>> Hoping to short-circuit a fair amount of research here in the hope >>>> that someone has had to do this already. I'll soon be looking to >>>> connect 10-20 ROACH boards by 10 gbe to a data acquisition >>>> computer(s). >>>> >>>> It seems like the smartest way of doing that is getting a 16-port >>>> switch or potentially two 8-port switches. But the 10 Gbe port on the >>>> ROACH seems to be CX4 which I take to be a less popular connector >>>> variety. >>>> >>>> What kind of switches have ROACH users out there used to connect up a >>>> bunch of boards? Are there switches out there to convert CX4 to >>>> something with a reach longer than the 15m Wikipedia quotes as the >>>> limit of CX4. 15m is very borderline for our needs. >>>> >>>> The prices seem to vary widely. We do not need network admin tools or >>>> anything fancy. In fact our data rates could probably go over 10Mb >>>> cabling, but the 10Gbe interface of the ROACH is more convenient from >>>> the firmware perspective. This is more of a multiplexer than a switch. >>>> >>>> Tom >>>> >>>> >>> >>> >> >
