[Beowulf] fdr in edr switch

[Darren Wise]

Heya,

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.

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.

Allot of the time it is cable compatibility and rarely the adapters themselves.

Hope this help you out buddy :) 
Kind regards,
Darren Wise

https://wisecorp.co.uk
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On 1 March 2021 19:02:36 GMT, Michael Di Domenico <mdidomenico4 at gmail.com> wrote:
>has anyone plugged a mellanox fdr card into a mellanox edr switch?  i
>need to connect a server that doesn't have a x16 port so no edr card,
>but i do have an fdr card that's x8.  i don't need the speed just the
>connection, but i've not tried this before.  a quick google says it
>should work, but i'm loathe to until i hear someone else has.
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