which is the part number to purchase "Ehanced User" for a "Business Edition 6000" system 8.x already installed?

Con que número de parte puedo adquirir licencias "Ehanced User" para un sistema Business Edition 6000 8.x ya instalado.

hello team!!!I am planning on upgrading a 3750x switch to a slightly newer version.Currently the switch is on version 12 and I am planning on taking it to version 15My question is, if Cisco support covers such Upgrades. I am planning on upgrading a 3...