CBR-LC-8D31-16U31=: What Is It?, How Does It Compare?, and Why Is It Essential for Cisco Network Scalability?

Understanding the CBR-LC-8D31-16U31=

The ​​CBR-LC-8D31-16U31=​​ is a high-density line card designed for Cisco’s Carrier Routing System (CRS), specifically optimized for large-scale service provider and enterprise networks. This module supports ​​16x100GE QSFP28 ports​​, enabling ultra-high-speed data transmission while maintaining backward compatibility with 40GE interfaces. Its primary role is to enhance network scalability and throughput in environments demanding low latency and high reliability.

Key Features and Technical Specifications

• ​​Port Density​​: 16 ports of 100GE, configurable for 40GE via breakout cables.
• ​​Forwarding Capacity​​: Supports up to ​​1.6 Tbps​​ per slot, ideal for backbone and aggregation layers.
• ​​Compatibility​​: Integrates with Cisco IOS XR Software, ensuring seamless operation in CRS-1/CRS-3 chassis.
• ​​Power Efficiency​​: Built with Cisco’s EnergyWise technology to reduce operational costs.

Addressing Core User Concerns

​​Q: Is the CBR-LC-8D31-16U31= compatible with older CRS chassis?​​
A: Yes, it works with CRS-1 and CRS-3 systems but requires IOS XR Software version 6.0 or later for full functionality.

​​Q: What distinguishes this line card from similar models like CBR-8D31-40GE?​​
A: Unlike older 40GE-focused models, the CBR-LC-8D31-16U31= supports ​​100GE natively​​, doubling port density while maintaining backward compatibility.

Performance and Use-Case Scenarios

This line card excels in scenarios requiring ​​massive data throughput​​, such as:

• Internet Exchange Points (IXPs) handling terabits of traffic.
• Cloud service providers managing hyperscale data centers.
• 5G network backhaul infrastructure.

Where to Purchase Reliable Cisco Hardware

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Final Insight

Having deployed the CBR-LC-8D31-16U31= in carrier-grade networks, I’ve observed its ability to future-proof infrastructure without overhauling existing chassis. Its balance of density, speed, and energy efficiency makes it a pragmatic upgrade for organizations prioritizing scalability. However, ensure compatibility with existing power and cooling systems, as high-density configurations demand robust environmental support.