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I'm just using 10GTek QSFP+ MPO transceivers from Amazon Besides MPO, if you can just do a short run (5m or less) a DAC cable like this one should be cheaper. I don't know of any other cards that support 4x10 mode besides the XL710 - in fact I bought one after seeing this thread.

I know this thread is kind of old...however I have a XL710-QDA1 NIC and can confirm that it will link up fine to the 4x10 QSFP+ ports on the ICX6610 fine. You need to use the Intel QSFP+ utility to set the NIC to 4x10 mode (the default is 1x40). On the host side it presents 4 usable ethernet...

Actually there is a rather mysterious cable from Dell that *claims* to do what you want: https://accessories.euro.dell.com/sna/productdetail.aspx?c=gr&l=en&s=dhs&cs=grdhs1&sku=470-abem But for the price of 1312.99 Euro I don't think anyone here has bought it to see if it works. Edit: just...

The two QSFP+ ports require a breakout cable to get 4 male SFP+ connectors per port. AFAIK breakout cables to RJ45 connectors do not exist.

Hello, I'm having an odd problem with the rear 10gb ports on my ICX6610 (1/2/2-1/2/5 & 1/2/7-1/2/10). I'm attempting to connect 4 of these ports to a host (using a breakout cable), and bonding them using 802.3ad LACP. On a fresh boot of the switch I can get this fully working on either QSFP+...