Cisco Systems 9010 Unicast Traffic, Multicast Traffic

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Cisco ASR 9000 Series Aggregation Services Router Overview and Reference Guide

OL-17501-09

Chapter 2 Functional Description

Route Processor Card

Figure 2-10 shows the Cisco ASR 9922 Router switch fabric.

Figure 2-10 Cisco ASR 9922 Router Switch Fabric

Unicast Traffic

Unicast traffic through the switch is managed by a VOQ scheduler chip. The VOQ scheduler ensures that

a buffer is available at the egress of the switch to receive a packet before the packet can be sent into the

switch. This mechanism ensures that all ingress line cards have fair access to an egress card, no matter

how congested that egress card may be.

The VOQ mechanism is an overlay, separate from the switch fabric itself. VOQ arbitration does not

directly control the switch fabric, but ensures that traffic presented to the switch will ultimately have a

place to go when it exits the switch, preventing congestion in the fabric.

The VOQ scheduler is also one-for-one redundant, with one VOQ scheduler chip on each of the two

redundant RSP/RP cards.

Multicast Traffic

Multicast traffic is replicated in the switch fabric. For multicast (including unicast floods), the

Cisco ASR 9000 Series Routers replicate the packet as necessary at the divergence points inside the

system, so that the multicast packets can replicate efficiently without having to burden any particular

path with multiple copies of the same packet.

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