Introduction
This document provides an overview of the Cisco 12000 Series Internet Router hardware architecture.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
The information in this document is based on the following hardware:
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Conventions
For more information on document conventions, see the Cisco Technical Tips Conventions.
Chassis
Cisco 12000 Series Internet Routers are available in these configurations:
* The Cisco 12016 can be upgraded to a Cisco 12416 using a switch fabric upgrade kit.
Chassis Slot Overview
Slots 0-15 are for line cards (LCs) (not all chassis support 16 LCs). The Gigabit Route Processor (GRP) can be put in any of these slots. On the Cisco 12012, Cisco recommends the use of slot 0 and 11 for the GRP, because these slots do not cool as well and the GRP dissipates less heat than the other LCs. The 12016 and 12416 are the same chassis. The only difference is the clock and scheduler card (CSC) and switch fabric cards (SFCs). The 12016 uses the GSR16/80-CSC and GSR16/80-SFC, while the 12416 uses the GSR16/320-CSC and GSR16/320-SFC. If you have a 12016 and want to "upgrade" it to a 12416, all you have to do is replace the GSR16/80-CSC and GSR16/80-SFC with the new GSR16/320-CSC and GSR16/320-SFC.
The alarm cards are integrated into the CSC cards for the 12008. All other chassis have separate alarm cards. This table provides the slot numbers and corresponding line cards for all chassis:
Slot Number |
Line Card |
0-15 |
LC/GRP |
16 |
CSC0 |
17 |
CSC1 |
18 |
SFC0 |
19 |
SFC1 |
20 |
SFC2 |
This table provides chassis-specific information:
Router |
Slot Number |
Line Card |
12008 |
24 |
Power supply A1 (upper) |
26 |
Power supply B1 (lower) |
12012 - Notes:
- The Alarm card does not show up separately.
- Use slots 0 and 11 for the GRP since these slots do not cool as well and the GRP emits less heat than the other LCs.
|
24 |
Power supply 1 (A1) |
25 |
Power supply 2 (A2) |
26 |
Power supply 3 (B1) |
27 |
Power supply 4 (B2) |
28 |
Top fan and blower module |
29 |
Bottom fan and blower module |
12016 and 12416 |
24 |
Upper alarm card |
25 |
Lower alarm card |
26 |
Unused |
27 |
Busboard |
28 |
Top fan and blower module |
29 |
Bottom fan and blower module |
12406 |
24 |
Power supply 1 + alarm module |
25 |
Power supply 2 + alarm module |
28 |
Blower module (top fan) |
29 |
Blower module (bottom fan) |
12410
Note: On this chassis, there are five specific SFCs.
|
21 |
SFC3 |
22 |
SFC4 |
24 |
Power supply 1 + alarm module |
25 |
Power supply 2 + alarm module |
28 |
Blower module (top fan) |
29 |
Blower module (bottom fan) |
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