<html><head></head><body>Heya,<br><br>I do very much the same QSFP28-EDR 100G adapter cards into QSFP+-FDR 56G just with the use of a cable. I even QSFP+-FDR to 4x SFP+-10G using various brocade, mellanox, chelsio hardware and have never come out worse.<br><br>Some cables can be a bit funny but I have never had issues with cables branded by NetApp, DELL, CISCO or purchasing coded variants from suppliers. However FS.com are a valued cable supplier for anything that I might think could be a bit fickle.<br><br>Allot of the time it is cable compatibility and rarely the adapters themselves.<br><br>Hope this help you out buddy :) <br>Kind regards,<br>Darren Wise<br><br><a href="https://wisecorp.co.uk">https://wisecorp.co.uk</a><br><a href="https://kotidc.com">https://kotidc.com</a><br><a href="https://thirah.com">https://thirah.com</a><br><a href="https://woprcompute.com">https://woprcompute.com</a><br><a href="https://adsstech.com">https://adsstech.com</a><br><br><div class="gmail_quote">On 1 March 2021 19:02:36 GMT, Michael Di Domenico <mdidomenico4@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">has anyone plugged a mellanox fdr card into a mellanox edr switch? i<br>need to connect a server that doesn't have a x16 port so no edr card,<br>but i do have an fdr card that's x8. i don't need the speed just the<br>connection, but i've not tried this before. a quick google says it<br>should work, but i'm loathe to until i hear someone else has.<hr>Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing<br>To change your subscription (digest mode or unsubscribe) visit <a href="https://beowulf.org/cgi-bin/mailman/listinfo/beowulf">https://beowulf.org/cgi-bin/mailman/listinfo/beowulf</a><br></pre></blockquote></div></body></html>