Specifications

5
Cisco 12016, Cisco 12416, and Cisco 12816 Router Clock and Scheduler, Switch Fabric, and Alarm Card Replacement Instructions
OL-13811-01
Switch Fabric Overview
• Switch fabric—Carries the user traffic between line cards or between the RP and a line card. The
switch fabric on the CSC is identical to the switch fabric on the SFC.
• Scheduler—Handles requests from the line cards for access to the switch fabric and determines
when to allow the line cards access to the switch fabric.
• System clock—Sent to all SFCs, line cards, and the RP. The system clock synchronizes data
transfers between line cards or between line cards and the RP through the switch fabric.
The SFC contains only the switch fabric circuitry, which carries user traffic between line cards or
between the RP and the line cards. It receives scheduling and system clock information from the CSC.