I think I replied to this already. There are only four MACs and so you can only run 4x10G. Also, the second 40G port is meant for failover, so you’ll only have 1x40G at line rate.
I don’t know how I can be clearer. Todd Fujinaka Software Application Engineer Networking Division (ND) Intel Corporation todd.fujin...@intel.com (503) 712-4565 From: Lucian-Ionut Lepadatu [mailto:lepadatu.luc...@gmail.com] Sent: Saturday, September 10, 2016 2:20 AM To: Fujinaka, Todd <todd.fujin...@intel.com> Cc: e1000-devel@lists.sourceforge.net Subject: Re: [E1000-devel] XL710-QDA2 10G breakout We want to use these cards for a TAP solution. The traffic is captured through passive optical splitters connected to several 10G links. From the splitters the traffic is then forwarded via a breakout cable to the XL710-QDA2 card. We are interested only in received traffic. Is there a way to capture the traffic on both 40G ports using breakout cables on all 2x4x10G or 2x40G mode in order to use all physical links (8x10G or 2x40G)? I know that on 40G ports there is a 66B encoding and the frames are sent in round robin on the 4 pairs of fiber of the MPO connector. But is it possible to implement in software a method such that to bypass this encoding and capture the traffic on 4x10G breakout on each of the 2 40G ports while the card is in 2x40G mode (thus avoiding the 4 MACs limitation)? On Fri, Sep 9, 2016 at 6:02 PM, Fujinaka, Todd <todd.fujin...@intel.com<mailto:todd.fujin...@intel.com>> wrote: There is a hardware limitation because there are only 4 10G MACs available. You cannot have 8 10G ports. Todd Fujinaka Software Application Engineer Networking Division (ND) Intel Corporation todd.fujin...@intel.com<mailto:todd.fujin...@intel.com> (503) 712-4565<tel:%28503%29%20712-4565> -----Original Message----- From: Lucian-Ionut Lepadatu [mailto:lepadatu.luc...@gmail.com<mailto:lepadatu.luc...@gmail.com>] Sent: Friday, September 09, 2016 1:03 AM To: e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net> Subject: [E1000-devel] XL710-QDA2 10G breakout Hello, New user of XL710-QDA2 (dual QSFP) card here. After some google search I cannot get a definite answer regarding the breakout capabilities of this card. I would like to know if the card's 40G ports can be split into 4x10G ports for each 40G port. I see from the documentations that only 4x10, 2x2x10A, 2x2x10B are available but I'm interested in knowing *if this is a software limitation or a a hardware one*. I also see that the total throughput is 40G but this is not a problem for my setup. I need both QSPF ports to be split into 10G ports. So is this possible?
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