On releases prior to 6.6.0 you could allow unsupported sfp modules for intel nics by adding
to the kernel boot config.
Is there a new way to enable unsupported SFP modules?
For posterity and future google searchers here is how you solve this.
On unraid before version 6.6.0 use
append initrd=/bzroot ixgbe.allow_unsupported_sfp=1,1,1,1
a ,1 for every additional sfp nic you need to enable unsupported sfp modules on
For unraid 6.6.0+ use
append initrd=/bzroot ixgbe.allow_unsupported_sfp=1
This will unlock unsupported sfp modules for all ixgbe driver nics
I would assume this change has something to do with the newer kernel or in tree drivers.
Hopefully this saves someone else a headache