Cisco Systems CRS-1 manual Eight PLIM slots left to right 0, 1, 2, 3...4, 5

Chapter 1 Cisco CRS-1 Carrier Routing System

The Cisco CRS-1 8-Slot Line Card Chassis

Figure 1-3 Cisco CRS-1 8-Slot Line Card Chassis Slot Numbers

3 2 1 0	RP	RP	7 6 5 4
	0	1

FAN 0

4 5 6 7	SM	SM	0 1 2 3
	0	1
	SM 2	SM 3

FAN 1

122777

As shown, the front (PLIM) side of the chassis has the following card slots:

•Eight PLIM slots (left to right: 0, 1, 2, 3...4, 5, 6, 7)

•Two route processor card slots (RP0 and RP1)

The rear (MSC) side of the chassis has the following card slots:

•Eight MSC slots (left to right: 7, 6, 5, 4...3, 2, 1, 0)

•Four half-height switch fabric card slots (SM0, SM1, SM2, and SM3)

Notice that the PLIM and MSC slot numbers are reversed. This reversal is because each MSC mates with its associated PLIM through the midplane. For example, the PLIM in slot 0 (far left on the chassis front) mates through the midplane with the MSC in slot 0 (far right on the chassis rear).

Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide

OL-5802-06 1-5