? Message us on In the ever-evolving landscape of enterprise networking, having reliable, high-bandwidth, and long-range connections is no longer optional—it’s critical. Whether you’re scaling a data center or expanding your network infrastructure, the Cisco SFP-10G-LR Module stands out as one of the most reliable fiber transceivers in Cisco’s arsenal. Built for long-range 10G connections, this Network module is widely trusted in enterprise, service provider, and cloud environments. But what exactly sets it apart?
In this article, we’ll dive deep into the specifications, features, benefits, and use cases of the Cisco SFP-10G-LR Module, compare it with other popular Cisco SFP modules, and help you understand why it might be the best SFP-10G-LR choice for your network setup.
An In-Depth Look at Cisco SFP-10G-LR Module
The Cisco SFP-10G-LR Module is a 10-Gigabit SFP+ (Small Form-Factor Pluggable) optical transceiver that provides up to 10 km of connectivity over single-mode fiber (SMF). Designed to comply with IEEE 802.3ae 10GBASE-LR standards, this transceiver is compatible with a wide array of Cisco switches and routers, making it an ideal solution for long-distance fiber connections.
The SFP-10G-LR operates on a standard 1310nm wavelength and supports a data rate of 10 Gbps. One of its key benefits is interoperability—not only across a range of Cisco devices but also with many industry-standard optical networking equipment from other vendors.
It belongs to Cisco’s broader family of 10G SFP+ modules, each optimized for different types of connectivity—ranging from short-range (SR) to extended-range (ZR) and copper (10GBASE-T). The LR variant hits the sweet spot between performance and cost-efficiency, which is why it’s a favorite for inter-building links, enterprise cores, and large-scale WAN connections.
Key Features of Cisco SFP-10G-LR Module
- 10 Gigabit Ethernet support
- Compliant with IEEE 802.3ae 10GBASE-LR
- Hot-swappable SFP+ form factor
- Supports digital optical monitoring (DOM)
- 1310nm wavelength with LC duplex connector
- Reach up to 10 kilometers over SMF
- Low power consumption (typically <1W)
- ROHS compliant
Benefits of Using Cisco SFP-10G-LR
1. Extended Reach for Enterprise and Metro Networks
The 10km reach over single-mode fiber makes it ideal for campus or metro aggregation, connecting network nodes across long physical distances without compromising on performance.
2. Exceptional Compatibility
One of the major advantages of this module is its wide compatibility. It works seamlessly with Cisco’s most popular switch families such as Catalyst 9000, Nexus 3000/9000, and ASR routers.
3. Hot-Swappable Convenience
Being hot-swappable means you can insert or replace the module without having to power down your system—great for maintaining uptime in production environments.
4. Monitoring and Diagnostics
With DOM support, administrators can monitor real-time parameters like optical power levels, temperature, and voltage—helping prevent failures before they happen.
Where to Use Cisco SFP-10G-LR Module
The Cisco SFP-10G-LR Module finds its place in a variety of high-demand environments:
Data Centers: To connect ToR (Top-of-Rack) and spine switches.
Enterprise Core Networks: For high-throughput aggregation links.
Campus Networks: Between buildings with fiber uplinks.
Service Providers: For metro aggregation and transport layers.
Cloud Infrastructure: Long-distance VM cluster interconnects.
Compatibility Note
This module is fully compliant with 10GBASE-LR standards and physically compatible with most Intel network cards (such as Intel X520, X710, etc.).
However, some Intel NICs may enforce vendor-specific transceiver restrictions. If you’re using an Intel NIC, we recommend checking for compatibility or contacting us before purchase.
 Connecting Core to Distribution in a Campus Network
Imagine a university campus with multiple buildings spread across a 6 km area. Each building has its own distribution switch, but you need all of them to connect to a central core switch in the data center. The Cisco SFP-10G-LR Module, paired with single-mode fiber, enables high-speed 10G links with reliability and efficiency, without needing expensive repeaters or special fiber types.
DOM Helps You Stay Ahead of Failures
A powerful advantage of this module is DOM (Digital Optical Monitoring). With it, you can monitor transmit/receive power, temperature, voltage, and laser bias current—so if something’s off, you’ll know before things go south. This proactive insight can be a real network saver.
Comparison with Other Cisco SFP+ Modules
| Feature | SFP-10G-LR | SFP-10G-SR | SFP-10G-ZR | SFP-10G-ER |
|---|---|---|---|---|
| Max Distance | 10 km (SMF) | 300 m (MMF) | 80 km (SMF) | 40 km (SMF) |
| Wavelength | 1310 nm | 850 nm | 1550 nm | 1550 nm |
| Fiber Type | Single-mode | Multi-mode | Single-mode | Single-mode |
| Power Consumption | ~1W | ~0.8W | ~1.5W | ~1.4W |
| Digital Monitoring (DOM) | Yes | Yes | Yes | Yes |
| Use Case | Enterprise, Campus | Short links, Data Centers | Long-haul, Metro WAN | Large campuses, Metro WAN |
| Relative Price (est.) | Mid | Low | High | High |
Cisco SFP-10G-LR Technical Specifications
| Specification | Details |
|---|---|
| Product Code | SFP-10G-LR |
| Form Factor | SFP+ |
| Data Rate | 10 Gbps |
| Fiber Type | Single-mode fiber (SMF) |
| Connector Type | LC duplex |
| Wavelength | 1310 nm |
| Maximum Reach | 10 km |
| Operating Temperature Range | 0°C to 70°C |
| Power Consumption | <1W |
| DOM Support | Yes |
| Compatibility | Cisco Catalyst, Nexus, ASR, ISR |
| Protocol | 10GBASE-LR, IEEE 802.3ae |
| Dimensions | 13.4 x 56.5 x 8.5 mm |
| Weight | 75g (approx.) |
Frequently Asked Questions (FAQ)
1. Is Cisco SFP-10G-LR Module compatible with all Cisco switches?
Not all. It’s compatible with most Cisco Catalyst, Nexus, ASR, and ISR series, but always check your device’s datasheet or software compatibility list.
2. Can I use the SFP-10G-LR with multi-mode fiber?
No. It’s designed for single-mode fiber. Using it with MMF may result in link failure.
3. What’s the maximum distance supported?
Up to 10 kilometers over standard single-mode fiber.
4. Does it support hot-swapping?
Yes. You can insert or remove it without shutting down the device.
5. How can I monitor its performance?
It supports DOM, allowing you to view temperature, voltage, and optical power levels.
6. What kind of connector does it use?
It uses an LC duplex connector.
7. Can I use third-party versions of this module?
Yes, but Cisco does not officially support them, and it may void support or warranty on your switch/router.
8. Is this module suitable for outdoor environments?
No, unless it’s housed within weatherproof enclosures. It’s meant for standard indoor environments.
9. Does it work with non-Cisco switches?
In some cases yes, but full functionality and DOM might not be supported. Use with caution.
Final Thoughts: Why Cisco SFP-10G-LR Remains a Reliable Choice
For organizations looking to maintain high-performance long-distance links across their network infrastructure, the Cisco SFP-10G-LR Module offers the perfect mix of affordability, reliability, and performance. It’s not just a transceiver—it’s a critical building block in modern enterprise networking.
Whether you’re upgrading your data center or expanding a campus network, this module ensures that your 10G links are stable, monitored, and future-ready. And if you’re searching for the Best SFP-10G-LR in the market, ITMan is your trusted partner to get genuine Cisco hardware delivered with care.
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