We tried to connect a device to this new switch (to one of the 12p 40G/100G QSFP28) but the port just won't come up. These 40/100G ports already do accept the 10G SFP's but do they even support the 1G SFP?
Details QSA module: CVR-QSFP-SFP (does support the 1G SFP) 1G SFP: GLC-SX-MMD NXOS: version 9.3(7)
I cannot show you the output of these commands as another transceiver (10G) is now inserted.
When i try to configure the speed it even does not show the 1G option, though the switch somehow accepted the command we copied the configuration from the old switch. switch(config-if)# speed ? 10000 10Gb/s 40000 40Gb/s
Also, we have not tried the 'no negitiation' option as we have to plan a change for this to be executed.