Specifications

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Cisco 12010, Cisco 12410, and Cisco 12810 Router Clock and Scheduler, Switch Fabric, and Alarm Card Replacement Instructions
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Switch Fabric Overview
Switch Fabric Overview
The switch fabric for the Cisco 12010, Cisco 12410, and Cisco 12810 Router consists of two clock and
scheduler cards (CSCs) and five switch fabric cards (SFCs) installed in the switch fabric and alarm card
cage. One CSC and four SFCs are required for an active switch fabric; the second CSC and the fifth SFC
provide redundancy.
Note Two alarm cards are also located in the switch fabric and alarm card cage. These cards are not a part of
the switch fabric. However, their removal and installation procedures are located in this publication in
the “Removing and Installing the Alarm Card” section on page 15.
Figure 1 illustrates the switch fabric and alarm card cage with the air filter door open. The cards in the
switch fabric and alarm card cage are labeled CSC-200, SFC-200, and Alarm. The labeling that identifies
the type of card for each slot is viewable when the air filter door is open.
Figure 1 Switch Fabric and Alarm Card Cage
Note The CSCs and SFCs support online insertion and removal (OIR), which means you can remove and
install a card while the router remains powered on. On the 10-slot chassis, the CSC's are only used for
clocking purposes and do not carry any data traffic. There are 5 SFC cards which carry the traffic. 4 of
the SFCs carry the actual traffic, while the 5th SFC is for redundancy purposes in case one of the SFC's
fail. The recommended procedure for any fabric card removal is to perform a hw module shut command
on the card, wait for approximately 1 minute, and then remove the card. Primary CSC OIR results in
traffic loss regardless of the line cards installed in chassis. Redundant SFC or CSC OIR should not cause
traffic loss regardless of the line cards installed in chassis.
The Cisco 12010 Router supports a 2.5-Gbps switch fabric.The Cisco 12410 Router supports a 10-Gbps
switch fabric. The Cisco 12810 Router supports a 40-Gbps switch fabric. Each SFC or CSC provides
either a 2.5-, 10-, or 40-Gbps full-duplex connection to each line card in the system.
There are currently six switch fabric options:
• Enhanced 2.5-Gbps switch fabric (50-Gbps switching system bandwidth) used in the Cisco 12010
Router—Consists of the 12010E-CSC and the 12010E-SFC fabric sets. Each SFC or CSC card
provides a 2.5-Gbps full-duplex connection to each line card in the system. Thus, for a Cisco 12010
Router with 10 line cards with 2 x 2.5 Gbps (full duplex), the system switching bandwidth is 10 x 5
Gbps = 50-Gbps. The enhanced fabric is required when enabling the Single-Router Automatic
Protection Switching (APS) or Building Integrated Timing Supply (BITS).
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