Cisco XR 12406 User Manual
Cisco XR 12406 Router Installation
Guide
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Text Part Number: OL-13831-01
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Cisco XR 12406 Router Installation Guide
© 2007 Cisco Systems, Inc. All rights reserved.
CONTENTS
About This Guide xi
Audience xi
Purpose xi
Installation Guide Organization xii
Document Conventions xiii
Obtaining Documentation, Obtaining Support, and Security Guidelines xiv
CHAPTER
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1 Cisco XR 12406 Router Overview 1-1
Router Description 1-1
Features 1-4
Physical and Functional Description 1-6
Route Processor 1-6
Line Cards 1-8
Multigigabit Crossbar Switch Fabric 1-10
Alarm Cards 1-12
Power Subsystems 1-15
Blower Module 1-24
Chassis Backplane and Maintenance Bus 1-26
Air Filters 1-29
Cable-Management System 1-30
Field-Replaceable Units 1-32
Upgrading a Cisco 12000 Series Router to a Cisco XR 12000 Series Router 1-33
Technical Specifications 1-33
Cisco XR 12406 Router Installation Guide
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Contents
CHAPTER
2 Preparing for Installation 2-1
Tools and Equipment 2-2
Safety and Compliance 2-2
General Safety Guidelines 2-3
Compliance and Safety Information 2-4
Preventing Electrostatic Discharge Damage 2-5
Laser Safety 2-7
Lifting Guidelines 2-7
Safety with Electricity 2-8
Installation Site Requirements 2-9
Rack-Mounting Guidelines 2-9
Environmental Guidelines 2-13
Power Connection Guidelines 2-14
Site Wiring 2-20
Unpacking and Repacking the Router 2-21
Transporting a Cisco XR 12000 Series Router 2-22
Site Preparation Checklist 2-22
CHAPTER
vi
3 Installing the Cisco XR 12406 Router 3-1
Required Tools 3-2
Installing a Router 3-2
Installing the Rack-Mounting Brackets—Optional 3-3
Installing Center-Mounting Brackets (optional) 3-5
Installing the Chassis in a Rack 3-7
Installing the Chassis on a Tabletop or Flat Surface 3-9
Supplemental Bonding and Grounding Connections 3-9
Connecting RP and Line Card Cables 3-13
Connecting Alarm Card Cables 3-15
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Connecting to the Console and Auxiliary Ports 3-15
PRP Console Port Signals 3-17
PRP Auxiliary Port Signals 3-17
Installing a Flash Memory Card 3-18
Connecting the PRP to an Ethernet Network 3-19
Connecting to an AC Power Source 3-24
Connecting to a DC Power Source 3-27
Powering On the Router—First Time 3-30
External Network Interface 3-33
Manually Booting the System 3-33
Boot Process Overview 3-33
Starting the Router and Observing Initial Conditions 3-34
Manually Booting the System 3-39
Contents
CHAPTER
CHAPTER
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4 Troubleshooting the Installation 4-1
Identifying Startup Problems 4-1
Using the System LEDs to Troubleshoot 4-3
Problem-Solving with Subsystems 4-4
Troubleshooting an AC Power Subsystem 4-6
Troubleshooting a DC Power Subsystem 4-9
Troubleshooting the Processor Subsystem 4-13
Troubleshooting the RP 4-13
Troubleshooting the Line Cards 4-18
Troubleshooting the Alarm Cards 4-21
Troubleshooting the Cooling Subsystem 4-25
5 Maintaining the Router 5-1
Tools and Equipment 5-3
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Contents
Powering Off the Router 5-3
Removing and Installing the Front Cover 5-4
Removing the Front Cover 5-4
Installing the Front Cover 5-4
Removing and Replacing the Air Filters 5-6
Removing and Replacing the Blower Module 5-8
Troubleshooting the Blower Installation 5-12
Installation Guidelines 5-13
Removing and Replacing an AC Power Entry Module 5-13
Troubleshooting the AC Power Entry Module Installation 5-17
Removing and Replacing an AC PDU 5-19
Removing and Replacing a DC PEM 5-26
Troubleshooting the DC Power Supply Installation 5-30
Removing and Replacing a DC PDU 5-31
Troubleshooting the DC PDU Installation 5-40
APPENDIX
viii
Removing and Replacing an RP or a Line Card 5-41
Attaching the Cable-Management Bracket and Connecting Cables 5-46
Removing and Installing a Clock and Scheduler Card, Switch Fabric Card, or Alarm
Card
5-50
Removing and Replacing a Clock Scheduler Card 5-50
Removing and Replacing a Switch Fabric Card 5-53
Removing and Replacing an Alarm Card 5-55
Upgrading the RP and Line Card Memory 5-58
A Cisco XR 12406 Router Technical Specifications and Warnings A-1
Specifications A-1
Alarm Card Alarm Relay Connector Specifications A-5
Compliance Information A-6
Regulatory, Compliance, and Safety Information A-9
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Translated Safety Warnings and Agency Approvals A-9
Electromagnetic Compatibility Regulatory Statements A-9
Compliance Label A-13
Router Performance Upgrades and Model Identification A-14
Contents
APPENDIX
I
NDEX
B Repacking the Router 1
Transporting and Storing the Router 1
Shipping Package Overview 2
Tools and Equipment 4
Safety Recommendations 4
Repacking the Router 4
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Contents
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x
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Audience
About This Guide
The Cisco XR 12406 Router Installation Guide is written for hardware installers
and system administrators of Cisco routers.
This publication assumes that the user has a substantial background in installing
and configuring router and switch-based hardware. The reader should also be
familiar with electronic circuitry and wiring practices, and have experience as an
electronic or electromechanical technician.
Purpose
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This installation and configuration guide contains procedures for installing the
router hardware, creating a basic startup configuration file, and powering on the
router for the first time.
Cisco XR 12406 Router Installation Guide
xi
Installation Guide Organization
Installation Guide Organization
The Cisco XR 12406 Router Installation Guide contains the following chapters,
appendix, and index.
• Chapter 1, “Cisco XR 12406 Router Overview”—Presents a high-level
system overview and physical description of the major components of Cisco
XR 12406 Router, including the power and cooling systems, Performance
Route Processor (PRP), clock and scheduler cards (CSC), switch fabric cards
(SFC), and alarm cards, and gives a functional overview.
• Chapter 2, “Preparing for Installation”—Describes safety, site requirements
for power, environmental safety, cabling, rack-mounting, electrostatic
discharge (ESD), unpacking, site log, and site preparation checklist.
• Chapter 3, “Installing the Cisco XR 12406 Router”—Gives the procedures
for the initial installation and setup of Cisco XR 12406 Router.
• Chapter 4, “Troubleshooting the Installation”—Explains how to identify and
solve problems that might occur during installation.
• Chapter 5, “Maintaining the Router”—Explains safety at the
field-replaceable unit (FRU) level, removal and replacement procedures for
field-replaceable units and assemblies, and associated procedures to
troubleshoot and verify FRU and device operation.
About This Guide
xii
• Appendix A, “Cisco XR 12406 Router Technical Specifications and
Warnings”—Provides technical specifications, connector cable
specifications, regulatory statements, and translated safety warnings for the
Cisco XR 12406 Router.
• Appendix B, “Repacking the Router”
• Index—Contains a keyword and subject index of pertinent terms and
information.
Cisco XR 12406 Router Installation Guide
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About This Guide
Document Conventions
This publication uses the following conventions:
• Ctrl represents the key labeled Control. For example, the key combination
Ctrl-z means hold down the Control key while you press the z key.
Command descriptions use these conventions:
• Examples that contain system prompts denote interactive sessions, indicating
the commands that you should enter at the prompt. The system prompt
indicates the current level of the EXEC command interpreter.
Document Conventions
For example, the prompt
level, and the prompt
router> indicates that you should be at the user
router# indicates that you should be at the privileged
level. Access to the privileged level usually requires a password. Refer to the
related software configuration and reference documentation for additional
information.
• Commands and keywords are in boldface font.
• Arguments for which you supply values are in italic font.
• Elements in square brackets ([ ]) are optional.
• Alternative but required keywords are grouped in braces ({ }) and separated
by vertical bars (|).
Examples use these conventions:
• Terminal sessions and sample console screen displays are in screen font.
• Information you enter is in boldf ace screen font.
• Nonprinting characters, such as passwords, are in angle brackets (< >).
• Default responses to system prompts are in square brackets ([ ]).
• Exclamation points (!) at the beginning of a line indicate a comment line.
Caution Means be careful. You are capable of doing something that might result in
equipment damage or loss of data.
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Note Means reader take note. Notes contain helpful suggestions or references to
materials not contained in this manual.
Cisco XR 12406 Router Installation Guide
xiii
Obtaining Documentation, Obtaining Support, and Security Guidelines
Timesaver Means the described action saves time. You can save time by performing the
action described in the paragraph.
About This Guide
Warning
This warning symbol means danger. You are in a situation that could cause
bodily injury. Before you work on any equipment, be aware of the hazards
involved with electrical circuitry and be familiar with standard practices for
preventing accidents. To see translations of the warnings that appear in this
publication, refer to the Regulatory Compliance and Safety Information
document that accompanied this device.
Obtaining Documentation, Obtaining Support, and
Security Guidelines
For information on obtaining documentation, obtaining support, providing
documentation feedback, security guidelines, and recommended aliases and
general Cisco documents, see the monthly What’s New in Cisco Product
Documentation, which also lists all new and revised Cisco technical
documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
xiv
Cisco XR 12406 Router Installation Guide
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Cisco XR 12406 Router Overview
This chapter provides an overview of the Cisco XR 12406 Router. It contains
physical descriptions of the router hardware and major components, and
functional descriptions of the hardware-related features.
Router Description
The Cisco XR 12406 Router, shown in Figure 1-1 and Figure 1-2, is a member of
the Cisco XR 12000 series router family. The Cisco XR 12406 router scales the
Internet Service Provider edge from speeds of T3/E3 (44.7/34.4 Mbps) up to
OC-192/STM-64 or 10GE (10 Gbps).
Note Illustrations are shown without the front door for clarity.
CHAPTER
1
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1-1
Chapter 1 Cisco XR 12406 Router Overview
Router Description
Figure 1-1 Cisco XR 12406 Router—Front View
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4 SFC slots (3) 8 Cable management bracket
Cisco XR 12406 Router Installation Guide
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Chapter 1 Cisco XR 12406 Router Overview
Figure 1-2 Cisco XR 12406 Router—Rear View
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Router Description
2 5
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2 Blower module LEDs 5 PDU (behind Blower module; AC
PDU shown)
3 Blower module handle —
With a chassis height of 18.5 inches (46.9 cm), four Cisco XR 12406 Routers can
be installed in a single standard 7-foot (2.15-m) equipment rack.
Cisco XR 12406 Router supports system software downloads for most Cisco XR
IOS software upgrades, which enables you to remotely download, store, and boot
from a new Cisco XR IOS image.
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Features
Features
Chapter 1 Cisco XR 12406 Router Overview
Cisco XR 12406 Router has the following key features:
• Route Processor (PRP-2)—Slot 5 (bottom slot) is the recommended slot for
the first route processor. When the router is equipped with a redundant route
processor, 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 route processors
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 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.
1-4
• 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.
• 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).
• A new stylish front door hides router cabling and can be installed to open
from the right side or left side to give you total flexibility.
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Chapter 1 Cisco XR 12406 Router Overview
• Network Equipment Building Systems—Cisco XR 12406 Router complies
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— The
Cisco XR 12406 Router complies 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—the Cisco XR 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—the Cisco XR 12406 Router has 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.
• Fiber Cable Management—Fiber cable management with support for
high-density fiber Fast Ethernet (FE) ports.
Features
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• 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.
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Chapter 1 Cisco XR 12406 Router Overview
Physical and Functional Description
Physical and Functional Description
The following are the main components that make up the Cisco XR 12406 Router:
• One route processor with a second (redundant) route processor option
• Up to 5 line cards (4 if there are redundant route processors)
• 2 clock scheduler cards (CSCs)
• 3 switch fabric cards (SFCs)
• 2 alarm cards
• 2 power modules
• Backplane and maintenance bus
• Blower module
• 2 air filters
These components and their functions are described in this section. See Chapter 5,
“Maintaining the Router” for instructions to remove and replace the FRUs.
Route Processor
The route processor for the Cisco XR 12406 Router is the Performance Route
Processor (PRP-2). For detailed information about the Performance Route
Processor, refer to the Cisco document, Performance Route Processor Installation
and Configuration Guide.
The PRP-2 performs the following primary functions:
• Executes routing protocol stacks
• Performs all protocol communications with other routers
• Builds and distributes forwarding information to all line cards
• Uploads the operating system software images to all installed line cards
• Provides out-of-band system console and auxiliary ports and an Ethernet port
• Monitors and manages the power and temperature of system components
Cisco XR 12406 Router Installation Guide
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during power-up
for router configuration and maintenance
such as line cards, power supplies, and fans
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Chapter 1 Cisco XR 12406 Router Overview
The Cisco PRP-2 delivers all these functions with enhanced performance and
capabilities. It also delivers the following feature enhancements (depending on
the software version running):
• Gigabit Ethernet management port
• Hard-drive support (optional part)
• BITS input ports
• 1 GB compact image Flash memory support (optional part)
• Memory scalability up to 4 GB
The PRP-2 communicates with the line cards either through the switch fabric or
through the MBus. The switch fabric connection is the main data path for routing
table distribution as well as for packets that are sent between the line cards and
the PRP-2. The MBus connection allows the PRP-2 to download a system
bootstrap image, collect or load diagnostic information, and perform general,
internal system maintenance operations.
The PRP-2 can be designated as either the Designated System Controller (DSC)
or the Secure Domain router (SDR).
The Designated System Controller (DSC) performs the following functions:
Physical and Functional Description
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• Implements control plane operations for the chassis
• Monitors temperature and voltage
• Monitors line cards
• On boot up, the first card to become active is designated as the DSC.
The Secure Domain Router (SDR) controls domain security features independent
of any other SDRs on the network.
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Line Cards
Line Cards
Note Refer to the current s software release notes for the most up-to-date list of
Chapter 1 Cisco XR 12406 Router Overview
The Cisco XR 12406 Router is shipped pre-installed with the number and type of
line cards that you ordered. Line cards and route processors can be installed in two
basic combinations to support route processor redundancy and a variety of
physical network media:
• Nonredundant route processor—One route processor and up to five Cisco
XR 12000 series router line cards.
• Redundant route processors—Two route processors and up to four Cisco
XR 12000 series router line cards.
Line cards can be installed in any slot—zero (0) through five (5)—in the card
cage. Slot number 5 is the recommended default route processor slot.
Single-mode and multimode line cards are shown in Figure 1-3.
supported line cards (see “Obtaining Documentation, Obtaining Support, and
Security Guidelines” on page xiv).
1-8
Line cards provide the interfaces to the router’s external physical media. External
connections are made from the front of the chassis to the connectors on the line
card face plates. The line cards communicate with the route processor and
exchange packet data with each other through the switch fabric cards in the switch
fabric and alarm card cage.
Caution Unoccupied card slots in the line card and route processor card cage must have a
blank filler panel installed (12000-WIDE-BLANK=) for electromagnetic
compatibility (EMC) and to ensure proper air flow through the chassis. When the
faceplate of a line card does not completely fill the card slot opening, a narrow
card filler panel must be installed (ACS-GSR16-LCFILL=).
A cable-management bracket attaches to the faceplate of each line card to manage
and organize the network interface cables connected to the individual ports on the
line card.
Line cards installed in the router support online insertion and removal (OIR),
which means you can remove and replace a line card while the router remains
powered on.
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Chapter 1 Cisco XR 12406 Router Overview
Note For instructions on removing, replacing, and configuring the line cards, see the
configuration note shipped with each line card when ordered as an FRU.
Figure 1-3 Sample Line Cards
Line Cards
Single Mode
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Front view Rear view
Cisco XR 12406 Router Installation Guide
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Line Cards
Multigigabit Crossbar Switch Fabric
The Cisco XR 12406 Router switch fabric circuity provides synchronized
gigabit-speed interconnections for the line cards and the route processor. The
switch fabric circuitry resides in five fabric card slots: two for CSCs; three for
SFCs (Figure 1-4).
Figure 1-4 Clock and Scheduler and Switch Fabric Card Bays
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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 route processor 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 the Cisco XR 12406 Router, you must have at least one CSC card
installed, in addition to SFC and alarm cards.
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Chapter 1 Cisco XR 12406 Router Overview
The CSC contains the following functionality:
• System clock—The system clock synchronizes data transfers between line
cards or between the route processor and a line card, through the switch
fabric. In systems with redundant CSCs, the two system clocks are
synchronized so that if one system clock fails, the other clock takes over. The
system clock signal is sent to all line cards, the route processor, and switch
fabric cards.
• Scheduler—The scheduler handles requests from the line cards for access to
the switch fabric. When the scheduler receives a request from a line card for
switch fabric access, the scheduler determines when to allow the line card
access to the switch fabric.
• Switch fabric—The switch fabric carries the user traffic between line cards or
between the route processor and the line cards. The switch fabric card
contains only the switch fabric circuitry and receives scheduling information
and system clock information from the CSC.
The SFC contains only the switch fabric circuitry, which carries user traffic
between line cards or between the route processor and the line cards. The SFC
receives scheduling information and the system clock sent from the CSC.
Line Cards
Switch Fabric Switching Capacity and Router Type
The Cisco XR 12406 Router is based on a 10-Gbps switch fabric, where each CSC
or SFC provides a 10-Gbps full-duplex connection to each line card in the system.
The 10-Gbps switch fabric consists of the Clock and Scheduler Card (product
number GSR6-CSC= for original fabrics, and 12406E-CSC= for enhanced fabric
versions) and the Switch Fabric Card (product number GSR6-SFC= for original
fabrics, and 12406E-SFC= for enhanced fabric versions). The 10-Gbps switch
fabric cards are labeled simply CSC and SFC.
Note 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.
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Line Cards
Switch Fabric Redundancy
Equipping the router with two CSCs provides data path, scheduler, and reference
clock redundancy. The interfaces between the line cards and the switch fabric are
monitored constantly. If the router detects a loss of synchronization (LOS), it
automatically activates the data paths of the redundant CSC, and data flows across
the redundant path. The switch to the redundant CSC occurs within 0.5 second,
with little or no loss of data.
Note The enhanced Cisco XR 12406 chassis (XR-12000/6 configured with 12406/120
fabric option) ships with redundant CSC which is required to maintain High
Availability for the system.
Alarm Cards
The Cisco XR 12406 Router has two alarm card slots (Figure 1-5). Each alarm
card performs the following function or indicates the following condition:
• Alarm output
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• CSC status
• SFC status
• Alarm card status
• Power source and power entry module status
• Alarm relay contacts
The entire alarm function has been implemented on redundant alarm cards with
OIR maintenance (hot-swappable) functionality.
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Chapter 1 Cisco XR 12406 Router Overview
Figure 1-5 Alarm Card Features
Line Cards
1 MBus status LED 5 Major alarm LED
2 CSC status LEDs (two) 6 Minor alarm LED
3 SFC status LEDs (three) – Alarm relay contact connector
4 Critical alarm LED —
Note The Cisco XR 12406 Router must be populated with two alarm cards, to meet
EMI standards.
Alarm Output Function
MBUS
CSC
ENABLED
0
FAI L
01 1 2
SFC
CRITICAL
MAJOR
1 432 5 6
MINOR
ALARM
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The alarm output function consists of a group of relays, LEDs, and their
associated drivers connected to an output port on the MBus module.
The alarm output function is controlled by the software on the route processor.
When a signal is received from the route processor, the MBus module on the alarm
card activates specific relays to signal an alarm condition. There are three alarm
condition severity levels: critical, major, and minor. The critical, major, and minor
LEDs are paired for redundancy to protect against a single failed LED.
Note Alarm cards for some Cisco XR 12000 series router have both audible and visible
alarm indicators. The alarm card for the Cisco XR 12406 Router provides only
visible alarm indicators as local alerts to unusual conditions in the router.
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Chapter 1 Cisco XR 12406 Router Overview
Line Cards
The IOS XR software running on the route processor determines whether a given
alarm condition is a critical, major, or minor alarm. Typing the show commands
sh gsr table and sh env all will give you the table of limits and current readings
for the LEDs.
Clock and Scheduler Card and Switch Fabric Card Status
The alarm card provides OK and FAIL indications for all clock and scheduler
cards and switch fabric cards in the system. Redundant signals from the fabric
cards are brought out to the LEDs on each alarm card. The alarm card does not
control how these LEDs are used.
The MBus auxiliary power supply consists of a 50W DC-DC power supply and
some current-sharing circuitry. Because the alarm card itself is powered by this
supply, the on-board MBus module can report problems with the supply only
when the redundant alarm card is in the chassis and providing MBus power.
Alarm Card Status
The ENABLED/FAIL pair of LEDs labeled MBUS indicate the status of the alarm
card. The green ENABLED LED indicates that the MBus module on the alarm
card is operating properly. The yellow FAIL LED indicates that the alarm card has
detected an error in itself or with the MBus power supply.
Power Source Monitoring
The alarm card monitors the power modules and signals when there is a condition
outside the normal range of operation. It discloses problems such as the following:
• Power source voltage is not being provided to a component
• A fault exists in the power source or power module
• Output voltage—Voltage monitor signal is outside the allowable range
• Output current—Current monitor signal is outside the allowable range
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Alarm Relay Contact Connector
The 9-pin D-type alarm relay contact connector on the faceplate of the alarm card
(see Figure 1-5) is used to connect external alarm indication equipment to the
router so that alarm indicator signals in the router can be repeated elsewhere
outside the router.
The pins on this connector are tied directly to the critical, major, and minor alarm
relay contacts (normally open, normally closed, and common). Any event that
causes one of the alarm LEDs on the alarm card faceplate to go on also activates
the corresponding relay contact closure. The relay interface is rated at a maximum
of 2A, 60V, or 50VA, whichever is greater.
Because alarm contact cables are entirely dependent on site-specific
circumstances, alarm connector cables are not available from Cisco. For
information about alarm connector wiring requirements and the pinout for the
alarm connector interface, see the “Alarm Card Alarm Relay Connector
Specifications” section on page A-5.
Power Subsystems
Line Cards
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The Cisco XR 12406 Router can be powered by either an AC or DC power
subsystem, as described in the following sections:
• AC Power Subsystem, page 1-16
• DC Power Subsystem, page 1-20
• Power Distribution, page 1-24
Note The Cisco XR 12406 Router can be either AC powered or DC powered; the router
cannot accept two different types of power modules at the same time.
Note The enhanced XR 12406 chassis (XR-12000/6 configured with 12406/120 fabric
option) ships with redundant power supply which is required to maintain High
Availability for the system.
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Line Cards
Note A Cisco XR 12406 Router operating from an AC power source can be converted
to operate from a DC power source, and vice versa. The conversion can be done
in the field, but the system must be powered down.
AC Power Subsystem
The AC power subsystem consists of the following system components:
• AC PDU (one)
• AC-input power supplies (one for nonredundant operation; two for redundant
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.
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operation)
AC PDU
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Facility AC power connects to AC-powered the Cisco XR 12406 Router though
the AC PDU on the chassis rear panel (Figure 1-6).
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