Cisco XR 12410 - Manual (Page 23)

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Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
OL-17441-01
Chapter 1 Product Overview
Switch Fabric and Alarm Card Overview
Switch Fabric and Alarm Card Overview
The switch fabric provides synchronized gigabit-speed connections between line
cards and the route processor. The 9-slot switch fabric and alarm card cage
contain:
• 2 clock scheduler cards (CSCs)
• 5 switch fabric cards (SFCs)
• 2 alarm cards
Note The two alarm cards that are located in the switch fabric and alarm card
cage are not part of the switch fabric.
One CSC and four SFCs are required for an active switch fabric; the second CSC
and the fifth SFC provide redundancy. The combination of CSCs and SFCs make
up the 10-Gbps per-slot switch fabric.
Each SFC or CSC provides a 10-Gbps full-duplex connection to each line card in
the system. For example, in a Cisco XR 12410 and Cisco XR 12810 Routers with
8 line cards, each with 2 x 10 Gbps capacity (full duplex), the system switching
bandwidth is 8 x 20 Gbps = 160 Gbps.
Figure 1-2 shows the slot configuration in the switch fabric and alarm card cage.
The labeling identifies the type of card for each slot and can only be seen when
the air filter door is opened.
Note Cisco XR 12410 and Cisco XR 12810 Routers support online insertion and
removal (OIR), which allows you to remove and replace a card while the router
remains powered on.