It is various versions of the CatOS 7.6(x) across multiple switches with Sup1A engines.

We have one switch with a Sup2 within the same CatOS 7.6 and it reports fine.

Thank you,

This is most likely due to the entPhysicalVendorType for the chassis slots being zeroDotZero instead of cevContainerSlot. In this case, the slot is ignored by RME inventory, and the total slot count is not properly reflected.

Typically, I would expect this problem to be tied to the software, so I wouldn't expect a Sup2 to work, but you might want to compare the entPhysicalVendorType values from the two switches.