Installing a card
On a 12508E or 12518E, install at least one MPU, one LPU, and seven switching fabric modules.
The 12500E does not support intermixing of the MPU, LPU, and switching fabric modules.
Use one of the following positions to install the card:
Install MPUs, Ethernet interface cards, and OAA cards at the front of the switch chassis. Slot 0 and Slot 1 are for MPUs and other slots (slots 2 to 9 for the 12508E, and slots 2 to 19 for the 12508E) are for Ethernet interface cards and OAA cards.
Install switching fabric modules in the switching fabric module slots (slots 10 to 18 for the 12518E, and slots 20 to 28 for the 12518E) at the rear of the chassis.
You can install MPUs, LPUs, and switching fabric modules in a similar way. This section describes how to install an MPU as an example.