Cisco Systems 9010 Cooling Failure Alarm

3-9

Cisco ASR 9000 Series Aggregation Services Router Overview and Reference Guide

OL-17501-09

Chapter 3 High Availability and Redundant Operation

Cooling System Redundancy

The Cisco ASR 9904 Router has a single fan tray located at the left side of the chassis and is accessible

from the rear. The fan tray has 12 fans arranged in three groups of four fans each. Two fans in each group

share a fan controller. The power supplied to the fan controller is 1:3 protected. A single fan failure has

no impact on air flow because the other eleven fans will compensate for it. If a fan controller fails, there

is a possibility of up to two fans failing; however, the design always has two fans operating to

compensate for the air speed.

In the Cisco ASR 9922 Router, the two top fan trays are located between the top and middle card cages,

while the two bottom fan trays are located between the middle and bottom card cages. In the Cisco ASR

9912 Router, the two fan trays are located above the line card cage. Each fan tray has 12 fans arranged

in three groups of four fans each. Two fans of each group share a fan controller. The power supplied to

the fan controller is 1:3 protected. A single fan failure has no impact on air flow because the other 11

fans will compensate for it. If the fan controller fails, there is a possibility of up to two fans failing;

however, the design always has two fans operating in a row (three rows of fans) to compensate for the

air speed.

Caution If only one fan tray is installed in the system, one single point of failure does not cause all fans to stop.

However, the system cannot operate without a fan tray. The system shuts itself off if all fan trays are

removed and the system crosses the Shutdown Temperature Threshold (STT).

Cooling Failure Alarm

Temperature sensors are installed in all cards and fan trays. These sensors detect and report any fan

failure or high temperature condition, and raise an alarm. Fan failure can be a fan stopping, fan controller

failure, power failure, or a failure of a communication link to the RSP/RP card.

Every card has temperature measurement points in the hottest expected area to clearly indicate a cooling

failure. The line cards have two sensors, one at the inlet and one near the hottest devices on the card. The

RSP/RP card also has two sensors.

Contents

Main Page CONTENTS Page Page Page Preface Audience Related Documentation Changes to This Document Document Conventions Obtaining Additional Information and Support Page Overview and Physical Description Chassis Physical Overview Cisco ASR 9010 Router 1-3 1-4 Cisco ASR 9006 Router Figure 1-4 Cisco ASR 9006 Router Chassis ComponentsVersion 2 Power Tray Figure 1-3 Cisco ASR 9006 Router Chassis ComponentsVersion 1 Power Tray Cisco ASR 9904 Router Cisco ASR 9922 Router Page Cisco ASR 9912 Router Field Replaceable Units Rack-Mounting Considerations 1-10 1-11 1-12 1-13 Chassis Slots Page Fiber and Interface Cable Management Routing of DC Power Tray Source Cables 1-18 Slot Numbering and Marking 1-19 Figure 1-17 Cisco ASR 9010 Router Slot ID NumberingVersion 2 Power Trays 1-20 Page 1-22 1-23 Power Module Hardware and Software Identification Hardware ID Software ID PS0 M0 PM0 PS0 M1 PM1 PS0 M2 PM2 PS0 M3 PM3 PS1 M0 PM4 Route Switch Processor and Route Processor Cards RSP Front Panel and Access Ports Page Page RP Front Panel and Access Ports Page Management Features Alarm Connector Serviceability RSP and RP Card Ejector Levers Fabric Controller Card Page FC Card Ejector Levers Ethernet Line Cards Line Card Front Panel and Access Ports Line Card Serviceability Line Card Ejector Levers Power System Line Card Front Panel and Access Ports Line Card Serviceability Line Card Ejector Levers Power System AC and DC Power Modules Page Cooling System Cooling Path Fan Trays Management and Configuration Page Functional Description Router Operation 2-2 Figure 2-2 shows the platform architecture of the Cisco ASR 9922 Router and Cisco ASR 9912 Router. 2-3 Figure 2-3 Major System Components and Interconnections in the Cisco ASR 9000 Series Routers 2-4 2-5 Figure 2-5 Major System Components and Interconnections in the Cisco ASR 9922 Series Router Route Switch Processor Card Page Page Route Processor Card Front Panel Connectors Management LAN Ports Console Port Auxiliary Port Alarm Out Front Panel Indicators Page LED Matrix Display LED Matrix Boot Stage and Runtime Display Page LED Matrix CAN Bus Controller Error Display Push Buttons Functional Description Switch Fabric Page Unicast Traffic Multicast Traffic Route Processor Functions 2-18 Processor-to-Processor Communication Route Processor/Fabric Interconnect Fabric Controller Card Page FC Card Front Panel Indicator Ethernet Line Cards Functional Description Page 40-Port Gigabit Ethernet (40x1GE) Line Card Page 8-Port 10-Gigabit Ethernet (8x10GE) 2:1 Oversubscribed Line Card 4-Port 10-Gigabit Ethernet (4x10GE) Line Card 2-28 Page 2-30 8-port 10-Gigabit Ethernet (8x10GE) 80-Gbps Line Rate Card Page 2-Port 10-Gigabit Ethernet + 20-port 1-Gigabit Ethernet (2x10GE + 20x1GE) Combination Line Card Page 2-34 16-port 10-Gigabit Ethernet (16x10GE) Oversubscribed Line Card Page 24-Port 10-Gigabit Ethernet Line Card Page 36-port 10-Gigabit Ethernet Line Card Page 2-port 100-Gigabit Ethernet Line Card 1-Port 100-Gigabit Ethernet Line Card Page Page Modular Line Cards 20-port Gigabit Ethernet Modular Port Adapter 8-port 10-Gigabit Ethernet Modular Port Adapter 4-Port 10-Gigabit Ethernet Modular Port Adapter 2-port 10-Gigabit Ethernet Modular Port Adapter 2-Port 40-Gigabit Ethernet Modular Port Adapter 1-Port 40-Gigabit Ethernet Modular Port Adapter Power System Functional Description 2-51 Figure 2-41 Cisco ASR 9010 Router AC Power System Block DiagramVersion 1 Power System 2-52 Figure 2-42 Cisco ASR 9010 Router AC Power System Block DiagramVersion 2 Power System 2-53 Figure 2-43 Cisco ASR 9010 Router DC Power System Block DiagramVersion 1 Power System 2-54 Figure 2-44 Cisco ASR 9010 Router DC Power System Block DiagramVersion 2 Power System 2-55 Figure 2-45 Cisco ASR 9006 Router AC Power System Block DiagramVersion 1 Power System 2-56 Figure 2-46 Cisco ASR 9006 Router AC Power System Block DiagramVersion 2 Power System 2-57 Figure 2-47 Cisco ASR 9006 Router DC Power System Block DiagramVersion 1 Power System 2-58 Figure 2-48 Cisco ASR 9006 Router DC Power System Block DiagramVersion 2 Power System 2-59 Figure 2-49 Cisco ASR 9904 Router AC Power System Block DiagramVersion 2 Power System 2-60 Figure 2-50 Cisco ASR 9904 Router DC Power System Block DiagramVersion 2 Power System 2-61 Figure 2-51 Cisco ASR 9922 Router AC Power System Block DiagramVersion 2 Power System 2-62 Figure 2-52 Cisco ASR 9922 Router DC Power System Block DiagramVersion 2 Power System Power Modules Power Module Status Indicators System Power Redundancy AC Power Trays 31 2 AC Tray Power Switch 1 2 43 AC Input Voltage Range AC System Operation Power Up Power Down DC Power Trays DC Tray Power Switch DC Power Tray Rear Panel DC Power Tray Power Feed Indicator 1 4 1 42 3 6 5 2 3 DC System Operation Power Up Power Down Cooling System Functional Description Cooling Path Page Page 2-74 Line cards Fan Trays Cisco ASR 9010 Router Fan Trays Cisco ASR 9006 Router Fan Trays Cisco ASR 9904 Router Fan Tray Cisco ASR 9922 Router and Cisco ASR 9912 Router Fan Trays Status Indicators Fan Tray Servicing Slot Fillers Chassis Air Filter Page Page Page Page Speed Control Temperature Sensing and Monitoring Servicing System Shutdown System Management and Configuration Cisco IOS XR Software System Management Interfaces Command-Line Interface Craft Works Interface SNMP SNMP Agent MIBs Online Diagnostics High Availability and Redundant Operation Features Overview High Availability Router Operations Stateful Switchover Fabric Switchover Active/Standby Status Interpretation Non-Stop Forwarding Nonstop Routing Graceful Restart Power Supply Redundancy AC Power Redundancy 3-5 DC Power Redundancy 3-7 2,100W DC system 1+1 min power redundancy Detection and Reporting of Power Problems Cooling System Redundancy Cooling Failure Alarm Page APPENDIX A Technical Specifications