Cisco Carrier Routing System

Cisco CRS Label Switch Processors Data Sheet

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The Cisco® Carrier Routing System (CRS) provides outstanding economical scale, IP and optical network convergence, and a proven architecture. Cisco CRS modular service cards (MSCs) are powered by advanced application-specific integrated circuits (ASICs), a chipset architecture based on multidimensional engineering, and Cisco IOS® XR Software, a unique distributed operating system.

Networks are facing new challenges with the Internet of Everything. Trillions of things have become Internet ready and can start talking to each other, as well as to applications and people. The effects of machine-driven events change network dynamics and impose entirely new service requirements. Managing bandwidth is no longer enough. Networks must become more elastic and programmable, capable of adapting and evolving. As part of an evolving and programmable network, the Cisco CRS delivers highly reliable operations and scales easily from single-chassis form factors to a massive multichassis system. Its design offers industry-leading efficiency in power consumption, cooling, and rack-space resources, while providing intelligent service-rich bandwidth capacity. The Cisco CRS supports up to 400-Gbps line rates, and its hardware is backward and forward compatible, helping to protect existing and future investments.

Product Overview

Cisco CRS label switch processors provide distributed forwarding-engine capability for the Cisco CRS platform. The label switch processors allow a flexible packet transport solution and are responsible for forwarding-processing tasks, handling all network traffic flows through the data plane. They can switch Multiprotocol Label Switching (MPLS) traffic at high throughput and low latency and jitter and offer immediate scalability to hundreds of thousands of label switched paths (LSPs).

Both the Cisco CRS-X Label Switch Processor and the Cisco CRS-3 Label Switch Processor are supported across the Cisco CRS 8-slot, 16-slot, and multichassis form factors and are compatible with both Cisco CRS enhanced chassis and legacy chassis-based systems.

The Cisco CRS-X Label Switch Processor (Figure 1) features two 200-Gbps forwarding ASICs and can operate in either 200-Gbps or 400-Gbps mode. While operating in a 400-Gbps mode in a Cisco CRS enhanced chassis-based system, the line card delivers full 400-Gbps line-rate throughput. In a 200-Gbps mode, one of the two forwarding ASICs is in a shut-down state to conserve on power and thermals.

Figure 1.      Cisco CRS-X Label Switch Processor

The Cisco CRS-X Label Switch Processor main features include:

   Flexibility to operate in 200-Gbps mode, where one of the two forwarding ASICs is in a shut-down state to conserve on power and thermals

   Seamless compatibility with previous-generation Cisco CRS-1 (40 Gbps) and Cisco CRS-3 (140 Gbps) line cards on the same chassis with Cisco CRS-X fabric

   Scaling of Cisco CRS per-slot forwarding capacity to 400 Gbps

   Single-flow traffic processing at 100 Gbps in each direction

   Packet transport forwarding engine with industry-leading, wire-rate performance at 400 Gbps

   Additional services, such as class of service (CoS) processing, multicast, traffic engineering, and statistics gathering, all performed at line-rate 400 Gbps

Figure 2.      Cisco CRS-3 Label Switch Processor

The Cisco CRS-3 Label Switch Processor main features include:

   Powered by Cisco Flow Array®, one of the world's most sophisticated chipset architectures, which includes a 140-Gbps ASIC, based on 65-nanometer (nm) technology; Cisco Flow Array was engineered for Cisco CRS routers to provide higher bandwidth without compromising service performance

   Supported across all the Cisco CRS form factors: 4-slot, 8-slot, 16-slot, and multichassis

   Scaling of Cisco CRS per-slot forwarding capacity to 140 Gbps

   Two 140-Gbps forwarding ASICs for discrete ingress and egress packet handling

   Single-flow traffic processing at 140 Gbps in each direction

Both the Cisco CRS-X and CRS-3 Label Switch Processors are optimized for label switching functions in a service provider's network and include:

   Additional services such as CoS processing, multicast, traffic engineering, and statistics gathering, all performed at 140 Gbps line rate

   Deployment flexibility by occupying one-half slot, allowing pairing with a variety of different interface modules

   Support for up to 8 queues per port

   Scaling for hundreds of thousands of LSPs and traffic engineering midpoints

   Built-in support for carrier-class high availability with fast reroute (FRR) capability, providing restoration in 50 ms in case of link or node failure

   Built-in hardware acceleration for critical network control traffic

   Built-in support for video monitoring for a comprehensive video quality of experience (QoE)

   Accurate hardware-assisted time-stamping support for service-level agreement (SLA) monitoring

   Industry-leading environmental efficiency with a lower power and weight profile

Product Specifications

Table 1 provides specifications for the Cisco CRS-X and CRS-3 label switch processors.

Table 1.       Product Specifications


Cisco CRS-X Label Switch Processor

Cisco CRS-3 Label Switch Processor

Chassis compatibility

  Compatible with legacy Cisco CRS line-card chassis (in 200-Gbps mode only)
  Compatible with enhanced Cisco CRS line-card chassis (400-Gbps mode)
  Requires 400-Gbps fabric cards
  Compatible with 400-Gbps physical interface modules including 4x100GE-OTN, 40x10GE-WLO, and 2x100GE-FLEX-40
  Compatible with all current Cisco CRS-3 line-card chassis
  Compatible with all current Cisco CRS-1 line-card chassis with 140-Gbps fabric cards
  Always paired with an interface module
  Compatible with 100- and 140-Gbps interface modules

Software compatibility

Cisco IOS XR Software Release 5.1.1 or later

Cisco IOS XR Software Release 4.1.1 or later

Features and protocols

IP features:

  Optimized IP features, such as unicast, equal-costmultipathing (ECMP), multicast, andload balancing

Forwarding features:

  Optimized QoS and security features
  Queuing (both ingress and egress)
  Diagnostic and network management support

MPLS features:

  MPLS forwarding
  MPLS load balancing
  Traffic engineering, point-to-multipoint (P2MP) traffic engineering
  Multicast Label Distribution Protocol (LDP)
  Policy-based tunnel selection (PBTS)
  MPLS operations, administration, and maintenance (OAM)
  User-network interface (UNI)
  Link Management Protocol (LMP)

Error detection and fast convergence features:

  Bidirectional forwarding detection (BFD)
  Ethernet OAM (EOAM), SLA, 802.1ag, 802.3ah, and Y.1731


  Interface statistics and Cisco NetFlow


  8 GB of total physical memory
  Configurable with up to 8 GB of route table memory
  1 GB of packet buffer memory per side (2 GB total per processor, ingress and egress)


  400-Gbps line-rate full-duplex throughput
  Maximum number of label switch processors per chassis: 8 slot (8) and 16 slot (16)
  40-Gbps line-rate full-duplex throughput
  125-Mpps switching performance
  Maximum number of label switch processors per chassis: 4 slot (4), 8 slot (8), and 16 slot (16)

Reliability and availability

  Online insertion and removal (OIR) support without affecting system
  In-service software patching
  Out-of-resource management
  Process restartability
  MPLS traffic engineering FRR within 50-ms
  MPLS loop-free alternate (LFA) FRR within 50-ms

Network management

  Cisco IOS XR Software command-line interface (CLI)
  Simple Network Management Protocol (SNMP)
  XML interface
  Cisco Prime

Physical dimensions

  Occupies one-half slot on a Cisco CRS chassis
  Weight: 14.75 lb (6.7 kg)
  Height: 20.6 in. (52.2 cm)
  Depth: 18.62 in. (47.25 cm)
  Width: 1.8 in. (4.49 cm)
  Occupies one-half slot on a Cisco CRS chassis
  Weight: 14.75 lb (6.7 kg)
  Height: 20.6 in. (52.2 cm)
  Depth: 18.62 in. (47.25 cm)
  Width: 1.8 in. (4.49 cm)


Expected value < 650W in 400-Gbps mode

Energy monitor functionality allows real-time power monitoring of each individual component - PLIMs and line cards, fabric, PRP through CLI, beginning with IOS XR Release 5.1.1


Environmental conditions

  Storage temperature: -40 to 158°F (-40 to 70°C)
  Operating temperature:
   Normal: 41 to 104°F (5 to 40°C)
   Short-term: 23 to 122°F (-5 to 50°C)
  Relative humidity:
   Normal: 5 to 85%
   Short-term: 5 to 90% but not to exceed 0.024 kg water/kg of dry air

Short-term refers to a period of not more than 96 consecutive hours and a total of 360 hours but not more than 15 instances in 1 year.

Approvals and Compliance

Table 2 provides standards compliance information for Cisco CRS label switch processors.

Table 2.       Compliance and Agency Approvals



Safety standards

  UL/CSA/IEC/EN 60950-1, 2nd ed, AM 1
  IEC/EN 60825 Laser Safety
  ACA TS001
  AS/NZS 60950
  FDA Code of Federal Regulations Laser Safety


  FCC Class A
  ICES 003 Class A
  AS/NZS 3548 Class A
  CISPR 22 (EN55022) Class A
  VCCI Class A
  BSMI Class A
  IEC/EN 61000-3-2: Power Line Harmonics
  IEC/EN 61000-3-3: Voltage Fluctuations and Flicker

Immunity (Basic standards)

  IEC/EN-61000-4-2: Electrostatic Discharge Immunity (8-kV contact, 15-kV air)
  IEC/EN-61000-4-3: Radiated Immunity (10V/m)
  IEC/EN-61000-4-4: Electrical Fast Transient Immunity (2-kV power, 1-kV signal)
  IEC/EN-61000-4-5: Surge AC Port (4-kV CM, 2-kV DM)
  IEC/EN-61000-4-5: Signal Ports (1 kV)
  IEC/EN-61000-4-5: Surge DC Port (1 kV)
  IEC/EN-61000-4-6: Immunity to Conducted Disturbances (10 Vrms)
  IEC/EN-61000-4-8: Power Frequency Magnetic Field Immunity (30A/m)
  IEC/EN-61000-4-11: Voltage Dips, Short Interruptions, and Voltage Variations


  EN300 386: Telecommunications Network Equipment (EMC)
  EN55022: Information Technology Equipment (Emissions)
  EN55024: Information Technology Equipment (Immunity)
  EN50082-1/EN-61000-6-1: Generic Immunity Standard

Network Equipment Building Standards (NEBS)

This product is designed to meet the following requirements (qualification in progress):

  SR-3580: NEBS Criteria Levels (Level 3)
  GR-1089-CORE: NEBS EMC and Safety
  GR-63-CORE: NEBS Physical Protection

Ordering Information

To place an order, contact your local Cisco representative or visit the Cisco Ordering Home Page. Use the ordering information in Table 3.

Table 3.       Ordering Information

Product Part Number

Product Name


Cisco CRS-3 Label Switch Processor


Cisco CRS-X Label Switch Processor

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