How to enable lane reversal in Arria 10 PCIe interface - How to enable lane reversal in Arria 10 PCIe interface Hi all, according to appendix B of the Arria 10 PCIe User Guide https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/archives/ug-01145_avmm-1_0.pdf it is possible to reverse the order of the PCIe lanes. This would be very useful for the routing, but I can't find how to enable it. Have I missed the buttor, does it work automatically or does this feature not exist? I am in the layout now and would not want to have to do the layout twice if this feature does not work properly... Yours, Marc. Replies: Re: How to enable lane reversal in Arria 10 PCIe interface Hi Sir, Lane reversal is supported and is done automatically during link training. Just to share more on PCIe. Even a device does not support lane reversal. The upstream device (eg. RP) will do the lane reversal when it detect the end point unable to make lane reversal.