Hi Alex, One additional option, there are 10 GbE CX4 + 1 GbE Base-T switches available (e.g. http://www.amazon.com/HP-J9147A-ABA-Procurve-2910AL-48G/dp/B00214XG0E/ ) but they're a little expensive (~few thousand dollars)
Andrew From: Dan Werthimer <[email protected]> Date: Tue, 24 Jul 2012 19:23:26 -0700 To: <[email protected]> Cc: <[email protected]> Subject: Re: [casper] Using ROACH 10gbe interface as 1gbe hi alex, sorry - you can't adapt the 10Gbe port to a 1Gbe port as the CX4 and RJ45 signals are not electrically compatible. there is, as you probably know, a 1Gbe port on the roach I, but it's not directly connected to the FPGA - the data from the FPGA must go through the CPU to the 1Gbe port, so it's a slow interface, meant for monitor and control. on roach II, there is a 1Gbe port directly connected to the FPGA, as well as another 1Gbe port on the CPU. best wishes, dan On Tue, Jul 24, 2012 at 7:06 PM, <[email protected]> wrote: > Is it possible to use the ROACH FPGA's 10gbe interface as a 1gbe one? > Ideally, one could get a bunch of CX4 to RJ45 adapters and have an array > of ROACHs communicate directly between their FPGAs with an ordinary 1gbe > switch for low bandwidth applications... > > -Alex Zahn > > > >
