Base on the document here:Installing Network Modules C9300 series They should be configured as 10G, but you can use a SFP (instead of SFP+) and operate them as 1G."C9300-NM-8XModuleAll ports in the C9300-NM-8Xmoduledefaultto 10 G and shouldbe configu...

Any luck solving this issue? Appreciate sharing your findings