Hello Rjs,

The UCS 6248UP has 32 physical ports out of 32 ports 12 ports are pre licensed .You can expand it up to 48 ports by using expansion module UCS-FI-E16UP (16-port Expansion module) in which out of 16 ports 8 ports are pre licensed .

The UCS 6248UP (with expansion module) has total of 48 ports in which 20 ports are pre licensed ,remaining ports can be licensed by using UCS-LIC-10GE per port .

Please check the links mentioned below, I hope it will help

http://www.cisco.com/en/US/products/ps11548/index.html

http://www.cisco.com/en/US/prod/collateral/ps10265/ps11544/data_sheet_c78-675245.pdf

Thanks

Syed