Cisco 12006 series Operating and safety instructions

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Product Overview
This chapter provides an overview of the Cisco 12006 and Cisco 12406 series
routers. It contains physical descriptions of the router hardware and major
components, and functional descriptions of the hardware-related features.
Introduction
The routers described in this guide are part of the Cisco 12006 and Cisco 12406
series routers and include:
•The original Cisco 12006 and Cisco 12406 series routers.
•The Cisco 12006 and Cisco 12406 enhanced series routers. The enhanced
series of routers use higher capacity power supplies, a more powerful blower
module, and have a new front door.
Note Most illustrations are shown without the new front door for clarity.

Chapter 1 Product Overview
Product Description
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These two router models are differentiated by the switching capacity of the switch
fabric installed in the router:
•Cisco 12006 Router—2.5-Gbps switch fabric
•Cisco 12406 Router—10-Gbps switch fabric
Other than their various capacities, these routers are almost identical. Differences
between each router are described unless otherwise noted, all information in this
publication applies to all routers.
Product Description
The Cisco 12006 and Cisco 12406 routers, shown in Figure 1-1, are members of
the Cisco 12000 series router family. These routers are aimed at scaling the
Internet and enterprise backbones to speeds of 155 Mbps (OC-3/STM-1),
622 Mbps (OC-12/STM-4), 2.4 Gbps (OC-48/STM-16), and 10 Gbps
(OC-192/STM).

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Chapter 1 Product Overview
Product Description
Figure 1-1 Cisco 12006 and Cisco 12406 router (Front View)
With a chassis height of 18.5 inches (46.9 cm), four Cisco 12006 and
Cisco 12406 routers can be installed in a single standard 7-foot (2.15-m)
equipment rack.
Cisco 12006 and Cisco 12406 routers support system software downloads for
most Cisco IOS software upgrades, which enables you to remotely download,
store, and boot from a new Cisco IOS image.
1Line card slots (five) 5Alarm card slots (two)
2RP slot 6Power module bays (two)
3Blower module 7CSC slots (two)
4SFC slots (three) 8Cable-management bracket
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Product Description
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Cisco 12006 and Cisco 12406 routers have the following key features:
•Route Processor (RP)—Slot 5 (bottom slot) is the recommended slot for the
first RP. When the router is equipped with a redundant RP, it can be installed
in any of the five regular line card slots.
•Line Cards—Up to five OC-192 line cards, four if redundant RPs are
installed. These slots support the online insertion and removal (OIR) feature
so installed cards are hot-swappable: A failed card can be removed and
replaced with the router powered on.
•Clock and Scheduler Cards (CSCs) and Switch Fabric Cards (SFCs)—Two
dedicated hot-swappable slots for CSCs; three dedicated hot-swappable slots
for SFCs.
Note The Cisco 12006 Router uses 2.5-Gbps switch fabric; the
Cisco 12406 Router uses 10-Gbps switch fabric. You cannot mix
2.5-Gbps switch fabric cards and 10-Gbps switch fabric cards in a
chassis. The router will not operate with a mix of switch fabric card
types.
Note When operating your router with a single CSC, the second CSC slot
must have a CSC blank filler (MAS-GSR6-CSCBLNK=) installed to
ensure EMI compliance.
•Two dedicated alarm card slots (for 1+1 redundancy)
•Alarm and Illumination—Alarm and illumination for operating ranges in the
card cage, clock and scheduler card, and switch fabric card bays.
•Two hot-swappable AC-input power supplies or DC-input power entry
modules (PEMs).
Note When operating your router on a single AC-input power supply or
DC-input PEM, the second power module bay must have a blank filler
(MAS-GSR-PWRBLANK=) installed to ensure EMI compliance.

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Product Description
•All power modules and other field replaceable units (FRUs), except for the
air blower module and the power distribution unit (PDU), can be removed
from the front of the chassis.
•All source power connections are located at the rear of the chassis on the
PDU. (See Figure 1-2.)
•Enhanced models have a new stylish front door that hides router cabling. The
door can be installed to open from the right side or left side to give you total
flexibility.
•Network Equipment Building Systems—Cisco 12006 and Cisco 12406
routers comply with the Network Equipment Building System (NEBS)
Criteria Level 3 requirements defined in SR-3580 for flammability,
structural, and electronics compliance.
•Electromagnetic Compatibility and Electrostatic Discharge Compliant—
Cisco 12006 and Cisco 12406 routers comply with emissions, immunity, and
electrostatic discharge (ESD) standards for both product and packaging.
•Bonding and Grounding—Bonding and grounding for safety, circuit
protection, noise currents, reliability, and operations compliance.
•Environmental Monitoring—Cisco 12006 and Cisco 12406 router complies
with environmental monitoring standards for operating temperature and
humidity, as well as handling temperature and humidity (except for heat
dissipation).
•Shock and Vibration—Cisco 12006 and Cisco 12406 routers have been
shock- and vibration-tested for operating ranges, handling, and earthquake
standards to NEBS (Zone 4 per GR-63-Core). These tests have been
conducted in earthquake environment and criteria, office vibration and
criteria, transportation vibration and criteria, and packaged equipment shock
criteria.

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Product Description
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Figure 1-2 Cisco 12006 and Cisco 12406 router (Rear View)
•Fiber Cable Management—Fiber cable management with support for
high-density fiber Fast Ethernet (FE) ports.
•Current 1.275-inch pitch line cards will fit in the line card cage with the
addition of a front panel adapter cover. The line card adapter cover is included
with the 1.275-inch line card.
1Blower module 4Air exhaust vents
2Blower module LEDs 5PDU (behind Blower module; AC
PDU shown)
3Blower module handle ––
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Chapter 1 Product Overview
Physical and Functional Description
Physical and Functional Description
The main physical components of Cisco 12006 and Cisco 12406 routers and their
functions are described in the following sections:
•Chassis, page 1-7
•Multigigabit Crossbar Switch Fabric, page 1-10
•Maintenance Bus, page 1-13
•Route Processors, page 1-15
•Line Cards, page 1-33
•Alarm Cards, page 1-35
•Power Subsystems, page 1-37
•Blower Module, page 1-47
•Air Filters, page 1-49
•Cable-Management System, page 1-50
Chassis
The Cisco 12006 and Cisco 12406 router chassis is an enclosure that consists of
two integral card cages and two power module bays. (see Figure 1-1.)
RP and Line Card Slots
The RP and line card cage has six user-configurable slots that support one RP and
up to five line cards. Network interfaces reside on the line cards that connect the
switch fabric of the router to the external networks. For more information about
the role of the RP, see the “Route Processors” section on page 1-15. For more
information about the role of the line cards, see the “Line Cards” section on
page 1-33.
Note Cisco 12006 and Cisco 12406 routers use line cards that are compatible with
other Cisco 12000 series routers.

Chapter 1 Product Overview
Chassis
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Switch Fabric Card Slots
The switch fabric circuitry resides in five fabric card slots: two for CSCs and three
for SFCs. (See Figure 1-1.) For more information about the role of the switch
fabric circuitry, see the “Multigigabit Crossbar Switch Fabric” section on
page 1-10.
Alarm Card Slots
Cisco 12006 and Cisco 12406 routers are equipped with two alarm cards. These
cards are positioned beside one another and occupy two card slots directly under
the CSC slots. (See Figure 1-1.) For more information about the role of the alarm
cards, see the “Alarm Cards” section on page 1-35.
Note The two alarm cards occupy slots under the two CSC slots in the CSC card cage,
but are not part of the switch fabric.
Chassis Backplane
All of the card cages are tied together electrically through a passive system
backplane in the back of the chassis. Nearly all of the wiring and circuitry in the
chassis is contained within or connected to the chassis backplane. The chassis
backplane distributes DC power to all of the cards in the chassis as well as the
blower module, and provides the physical communication pathway between
cards, both for network data and system communication across the internal system
maintenance bus (MBus).

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Chapter 1 Product Overview
Chassis
Power
Because a Cisco 12006 or Cisco 12406 Router can be configured with either an
AC-input power system or a DC-input power system, the power module bays will
accept either AC-input power supply modules or DC-input PEMs. For more
information about the power subsystems, see the “Power Subsystems” section on
page 1-37.
Caution To ensure that the chassis configuration complies with the required power
budgets, use the on-line power calculator. Failure to properly verify the
configuration may result in an unpredictable state if one of the power units fails.
Contact your local sales representative for assistance.
Cooling
Cisco 12006 and Cisco 12406 routers are equipped with a blower module to
distribute air within the chassis. The blower module is a removable module
located on the rear of the chassis. (See Figure 1-2.) For more information about
the blower module, see the “Blower Module” section on page 1-47.

Chapter 1 Product Overview
Multigigabit Crossbar Switch Fabric
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Multigigabit Crossbar Switch Fabric
Cisco 12006 and Cisco 12406 router switch fabric circuity provides synchronized
gigabit-speed interconnections for the line cards and the RP. The switch fabric
circuitry resides in five fabric card slots: two for CSCs; three for SFCs. (See
Figure 1-3.)
Figure 1-3 Clock and Scheduler and Switch Fabric Card Bays
Switch Fabric Card Types
The CSCs are installed in the half-width slots labeled CSC 0 and CSC 1 on the
lower left side of the chassis, located directly beneath the RP and line card cage
and directly above the alarm card bays. The three SFCs are installed in the
half-width slots labeled SFC 0, SFC 1, and SFC 2 on the lower right side of the
chassis.
Note To operate, Cisco 12006 and Cisco 12406 routers must have at least one CSC card
installed, in addition to SFC and alarm cards.
The CSC contains the following functionality:
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