Switch Fabric Cards; Switch Fabric Card Description - Cisco CRS-1 System Description

Chapter 4 Switch Fabric
At least two planes of the switch fabric (an even plane and an odd plane) must be active at all times for
Note
the Cisco CRS 4-slot line card chassis to operate. Otherwise, the switch fabric fails, causing a system
failure.

Switch Fabric Cards

The Cisco CRS 4-slot line card chassis supports two types of switch fabric card. This section describes
the cards and their indicators.

Switch Fabric Card Description

This section describes both the QQ123 and QQ123-140G switch fabric cards.
The switch fabric cards implement all three stages of the three-stage Benes switch fabric. Each card also
implements one plane of the four-plane switch fabric.
Figure 4-3
OL-10805-10
shows the QQ123-140G switch fabric card.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description
Figure 4-2 shows the QQ123 switch fabric card.
Switch Fabric Cards
4-3