In Spirent TestCenter, Notice for new Hardware MX-10G-C2/4/8 module.
Only 8 MX-10G-C8 modules are supported in SPT-11U
Do not place a MX-10G-C8 module in slot 6 or in slot 10 of an SPT-11U chassis
MX-10G-C8, MX-10G-C4 and MX-10G-C2 are not supported in the SPT-3U chassis