Physical And Functional Description Of Router - Cisco 12416 Installation And Configuration Manual

Physical and Functional Description of Router

Physical and Functional Description of Router
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
1-2
The Cisco 12000 series router chassis is a sheet-metal enclosure that houses router
components. The major components consist of three power supplies, upper and
lower line card cages, a switch fabric card cage, and upper and lower blower
modules. Power is distributed to these components over the chassis backplane.
All router models contain the following major components
• Power shelf and power supplies—Three AC or DC power entry modules
(PEMs) provide power to the router. See the
section on page 1-4
Upper blower module—Supplies cooling air to the upper half of the router so
•
it does not overheat. See the
additional information.
Upper and lower cable management brackets—Used to neatly route line card
•
cables. See the "Upper and Lower Cable Management Brackets" section on
page 1-43 for additional information.
Upper Line card and Route Processor card cage—Has 8 user-configurable
•
slots that support a combination of line cards, a route processor (RP), and an
alarm card. See the
section on page 1-21
Switch fabric card cage—Located behind the air filter door, this card cage
•
contains 5 slots for the switch fabric card set. The switch fabric card set is
made up of 3 switch fabric cards (SFCs) and 2 clock scheduler cards (CSCs).
See the "Switch Fabric Overview" section on page 1-19
information.
Lower Line card and Route Processor card cage—Has 8 user-configurable
•
slots that support a combination of line cards, a redundant route processor
(RP), and an alarm card. See the
Overview" section on page 1-21
Lower blower module—Supplies cooling air to the lower half of the router so
•
it does not overheat. See the
additional information.
Chassis backplane (not shown)—Distributes power to card cages and to the
•
blower modules.
for additional information.
"Blower Module" section on page 1-44
"Alarm Card, Line Card, and Rout Processor Overview"
for additional information.
"Alarm Card, Line Card, and Rout Processor
for additional information.
"Blower Module" section on page 1-44
Chapter 1 Product Overview
(Figure 1-1):
"AC and DC Power Subsystems"
for additional
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for
for