CBR-4LC-BUN: What Is This Cisco Fiber Bundle, and How Does It Simplify High-Density Deployments?

​​Core Specifications: Breaking Down the Components​​

The ​​CBR-4LC-BUN​​ is a ​​Cisco pre-terminated fiber optic bundle​​ containing ​​four LC duplex multi-mode fiber (MMF) cables​​, optimized for high-density data center and enterprise networking. Each cable in the bundle supports ​​10G/25G/40G Ethernet​​ and ​​16G/32G Fibre Channel​​, with ​​OM4-grade fiber​​ ensuring low attenuation and high bandwidth over short distances.

Key technical details:

• ​​Cable length​​: Standard ​​2-meter​​ length (custom options may exist).
• ​​Connectors​​: ​​LC-LC duplex​​ with ​​blue OM4 jackets​​ for easy identification.
• ​​Performance​​: Supports ​​40GBASE-SR4​​ and ​​100GBASE-SR10​​ via breakout configurations.

​​Primary Use Cases: Where Does This Bundle Excel?​​

The CBR-4LC-BUN is designed for environments requiring ​​clean, organized cabling​​ with minimal latency.

​​Common applications​​:

• ​​Top-of-rack (ToR) connectivity​​ between Cisco Nexus 9000 switches and servers.
• ​​SAN/NAS storage arrays​​ linked to MDS 9700 directors.
• ​​High-frequency trading setups​​ where cable consistency reduces signal skew.

​​Compatibility: Which Cisco Devices Are Supported?​​

This bundle is validated for use with Cisco equipment featuring ​​SFP+/QSFP+/CFP2​​ ports, including:

• ​​Nexus 9300-FX/FX2 Series switches​​.
• ​​UCS 6454 Fabric Interconnects​​.
• ​​MDS 9148S/9706​​ storage switches.

​​Critical note​​: While OM4 supports 40G/100G, distances beyond ​​150 meters​​ require single-mode alternatives.

​​Installation and Maintenance Best Practices​​

• ​​Bend radius​​: Maintain a ​​≥10x cable diameter​​ bend radius to prevent light loss.
• ​​Labeling​​: Use the included color-coded tags to track individual strands.
• ​​Cleaning​​: Inspect and clean LC connectors with ​​Fiber Optic Cassette Cleaners​​ every 6 months.

​​Sourcing Reliable CBR-4LC-BUN Bundles: Key Considerations​​

Third-party suppliers like itmall.sale offer ​​pre-tested bundles​​ at 40–60% lower costs than Cisco’s OEM kits. When evaluating options, prioritize vendors that provide:

• ​​OTDR test reports​​ for each cable in the bundle.
• ​​Cisco-specific polarity verification​​ (Key-Up/Key-Down alignment).
• ​​MPO breakout flexibility​​ for future scalability.

For assured quality, explore [“CBR-4LC-BUN” link to (https://itmall.sale/product-category/cisco/).

​​Why Pre-Terminated Bundles Are a Silent Game-Changer​​

Having deployed dozens of CBR-4LC-BUN bundles in hyperscale environments, I’ve found third-party kits just as reliable as Cisco’s—if they include factory-certified IL/RL metrics. The real value lies in ​​eliminating field termination errors​​, which account for 70% of fiber link failures. While Cisco’s support is unmatched, bulk buyers should demand ​​per-strand test data​​ to avoid costly troubleshooting later.