Chapter5 Maintaining the Router
Removing and Installing a Clock and Scheduler Card, Switch Fabric Card, or Alarm Card
5-50
CiscoXR 12406 Router Installation Guide
OL-13831-01
Removing and Installing a Clock and Scheduler Card, Switch Fabric Card, or Alarm Card
The Cisco XR 12406 router is based on a 10-Gbps switch fabric, where each SFC
or CSC provides a 10-Gbps full-duplex connection to each line card in the system.
The 10-Gbps switch fabric consists of the Clock Scheduler Card and the Switch
Fabric Card. The chassis has slots for two CSCs, three SFCs, and two alarm cards
(Figure5-31).
Figure5-31 CSC, SFC, and Alarm Card Slot Locations

Removing and Replacing a Clock Scheduler Card

If a router is not configured with redundant CSCs, it has one CSC i nstalled in
either of the CSC slots, and has a CSC blank filler installed in the second CSC
slot.
Caution The CSCs support OIR, so when the router is equipped with two CSCs, you can
remove either CSC while the system remains powered on. In a router equipped
with only one CSC, you must shut down the router before removing the CSC.
SLOT
-0
GIGABIT ROUTE PROCESSOR
SLOT
-1
COLL
LINK
TX
RX
RJ-45
MII
RESET
AUX
EJECT
CONSOLE
57084
SFC
CSC
CSC
SFC
SFC
Alarm
cards (2)
CISCO 12000
SERIES
GIGABIT SWITCH ROUTER