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Description
Cisco 40GBase-LR4 QSFP Module for SMF with OTU-3 Data-Rate SupportElevate your data center bandwidth with Ciscos 40GBASE QSFP module designed for SMF (single mode fiber) networks and OTU 3 data rate support. This compact, high density transceiver delivers reliable 40 Gigabit Ethernet connectivity in enterprise cores, distribution layers, and service provider backbones while maintaining energy efficiency and low footprint. Built to align with Ciscos proven reliability and interoperability, the module fits seamlessly
Elevate your data-center bandwidth with Cisco’s 40GBASE QSFP module designed for SMF (single-mode fiber) networks and OTU-3 data-rate support. This compact, high-density transceiver delivers reliable 40 Gigabit Ethernet connectivity in enterprise cores, distribution layers, and service-provider backbones while maintaining energy efficiency and low footprint. Built to align with Cisco’s proven reliability and interoperability, the module fits seamlessly into Cisco switches and routers, delivering scalable performance for modern cloud, AI, and HPC workloads. With four parallel 10 Gbps lanes packed into a single QSFP package, it enables dense rack configurations, streamlined cabling, and simplified management — all while supporting OTU-3 mapping for efficient transport networks. Whether you’re stitching together campus interconnects, spine-leaf fabrics, or long-haul links, this LR4 module provides the long reach and robust optics needed to keep data moving at high speeds with exceptional precision and low latency.
- Compact, high-density design and scalable throughput: The Cisco 40GBASE-LR4 QSFP module consolidates four independent 10 Gbps transmit/receive channels into one QSFP+ form factor, delivering a total potential throughput of 40 Gbps. This enables dense rack designs, simplified patching, and easier cable management across data centers and HPC environments, while preserving investment in existing fiber infrastructure and switch ports.
- SMF reach with long-haul capabilities: Engineered specifically for single-mode fiber, this LR4 transceiver supports long-distance links up to 10 kilometers (subject to fiber type and installation conditions). It’s ideal for data-center interconnects, metro-area backbones, cross-building links, and campus deployments where fiber runs span multiple kilometers, enabling scalable, future-proof connectivity.
- OTU-3 data-rate support for carrier-grade transport: Designed to accommodate OTU-3 data-rate requirements, the module integrates smoothly with optical transport architectures and supports efficient data mapping for high-throughput services. It’s well-suited for tier-1 and tier-2 networks that demand reliable, predictable transport performance alongside 40G Ethernet.
- Ease of deployment, monitoring, and manageability: The hot-swappable design allows installation and replacement with minimal disruption to active networks on compatible Cisco platforms. Digital Diagnostics Monitoring (DDM) provides real-time visibility into critical operating parameters such as transmit power, receive power, temperature, and laser bias current, enabling proactive maintenance and faster fault isolation.
- Reliability, compatibility, and industry stewardship: Cisco’s LR4 QSFP module is engineered for consistent optical performance, thermal stability, and long-term reliability in demanding data-center, HPC, and service-provider environments. It adheres to universal QSFP specifications and is designed for interoperability with Cisco devices and a broad ecosystem of optics, helping simplify inventory and procurement while reducing risk during upgrades and expansions.
- Data rate: 40 Gbps
- Form factor: QSFP+ (Quad Small Form-Factor Pluggable)
- Media type: Single-Mode Fiber (SMF)
- Reach: Up to 10 km (distance depends on fiber quality and optical budget)
- Wavelength channels: 4 × 10 Gbps lanes (LR4); optimized for SMF with 1310/1550 nm operation
- Connector type: LC duplex
- OTU-3 data-rate support: Compatible with OTU-3 transport mappings
- Diagnostics: Digital Diagnostics Monitoring (DDM) capable
- Power consumption: Low-power design aligned with Cisco QSFP specifications
- Operating environment: Designed for standard commercial data-center temperature ranges; refer to datasheet for exact specs
- Installation: Hot-swappable with supported Cisco devices
How to install Cisco 40GBase-LR4 QSFP Module for SMF with OTU-3 Data-Rate Support
- Prepare the platform: Ensure you are using a Cisco device that supports 40GBASE-LR4 QSFP modules and verify that the firmware is up to date for optimal compatibility and feature support.
- Power and safety considerations: If your platform requires hot-swapping, follow the vendor’s hot-swapping guidelines. If you are unsure, power down the chassis according to your data-center procedures before installation to avoid unexpected behavior.
- Remove the existing module (if upgrading): Release the retention latch, carefully extract the existing transceiver from the QSFP port, and set it aside in an anti-static container.
- Install the new transceiver: Align the LR4 QSFP module with the port, slide it in straight until the retention latch locks, and confirm that the device recognizes the new module via the management interface.
- Connect the fiber and verify performance: Attach the SMF fiber pair to the LC duplex connectors, ensuring correct polarity and fiber type. Run basic link verification, view DDM data if available, and perform a throughput test to confirm link quality and stability.
- Q: Is this Cisco 40GBase-LR4 QSFP module compatible with non-Cisco equipment? A: This module is designed for Cisco platforms and is most reliably used within Cisco ecosystems. Interoperability with non-Cisco devices can vary; check vendor compatibility matrices and firmware requirements before mixing optics across brands.
- Q: What kind of fiber is required for LR4 with OTU-3 support? A: Single-Mode Fiber (SMF) with standard LC duplex connectors is recommended. Ensure proper fiber quality (e.g., low attenuation) and clean connectors to achieve maximum reach and best optical performance.
- Q: How can I monitor the transceiver’s health after installation? A: Use Digital Diagnostics Monitoring (DDM) to monitor optical power, temperature, and other critical metrics in real time. This helps you detect drift or degradation early and plan maintenance before issues impact service.
- Q: What is the typical reach for this module, and does it require any special fiber cable? A: Typical reach is up to 10 kilometers on standard SMF; the exact distance depends on fiber quality, splice loss, connector cleanliness, and overall network design. No special fiber beyond standard SMF is required.
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4.9 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Great
Size: Medium, Number of Items: 1
I need something that was soft for my three year old and this ball is super great, it not only is the right size but it also fits in his mouth just right. Although he is a super aggressive chewer, the ball toy hasn't been totally destroyed yet and it is easy on his gums. The ball is so durable that got two of these toys just for fun.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
The best!
UPDATE: 08/05/2025 - This is still one of my dog's 2 fav training/play toys. A couple of notes:
1. This is not a chew toy. If your pup is chewing up the rope, that's on you. That being said, you can get 100' of the poly cord rope at Home Depot for like $4.98. You can make nearly 100 ropes out of 100'. How hard is it to replace the rope?????
2. My pup is a now 15 month old Malinois. His original balls, purchase in September 2024 are still in everyday, multiple times per day, play. I did get careless and leave one where he got it and chew the rope. Easily replaced. Nothing to fret over. Yes, that was on me!
3.The foam ball is virtually indestructible! Replace the rope!
4. I noticed the price for the yellow large went from $12 each to $24. THIS will cause me to go elsewhere if they doubled in price. I LOVE these balls but not that much. I noticed they have a new yellow ball that has a strap vs. a rope. I might try that if I need one, but I have 6 of these balls, 2 never used yet, 2 that are virtually new looking, and 2 that have been in play since september 2024. I don't think I'll be buying more any time soon, but if I do need more, I hope they haven't gone up to $24 each.
One of my top, go-to training tools. Quality is great other than the shrink wrap around the string joint. It's junk but not essential.
Great tug and fetch toy. Essential to teaching a good "out" command (2 are recommended for this).
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Reviewed in the United States on January 11, 2025
★★★★★ 5
Best dog ball
This is our go to dog toy for our German shepherd. its great for training in sports as well as outings at the beach, considering it floats! Never had him destroy one, so its extremely durable. I like that its a bright color so its easier to locate when i accidently let go of the rope too late and end up whipping it 20 ft into the woods. Easy to clean, all around just a great toy. Also love the large size as having a dog accidently lodge a ball into its throat is a real fear of mine, I do not have to worry about that with this toy. I should also mention the rope is a must, as touching a slobbery ball isn't the greatest feeling in the world and it puts your hands out of harms way. I will forever order these.
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Reviewed in the United States on September 7, 2025
★★★★★ 4
Great ball, bad rope
Size: Medium, Number of Items: 1, Size: Medium, Number of Items: 1
My dog and I love the starmark ball on a rope tug toys. While this is one of the best tug toys we have found, I am continually disappointed with the quality of the rope. The plastic sleeve comes off the first day, and after that the stitching begins to weaken until the rope ends come apart and the rope slides out of the ball. Is there a way to improve this design so that this toy lasts longer? My dog is not left alone with the toy, it is only used as an interactive tug toy as a training reward.
I am updating my review now several months later. I reinforced the rope with a paracord braid and the toy now lasts a very long time. My dog and I play with this toy everyday on our morning hike. He is a large German Shepherd with high ball drive. He carries this ball in his mouth several miles on our morning hike. We play fetch in the fields near our home and in the lake beyond the fields with this toy every day. This toy is his reward in obedience training and we play a lot of tug with it every day. Reinforcing the handle has made a huge difference as the toy lasts and lasts now with the improved rope. Great ball, we will always have a collection of them at our house!
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Reviewed in the United States on September 19, 2020
★★★★★ 5
Great for training and play!
Size: Medium, Number of Items: 1
My German shepherd love this toy! Great to take on walks with you as light weight and can fit in your pocket. Stands up to the toughest of play. Great as reward toy for training in place of treats! We always have one on hand at home or out and about!
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Reviewed in the United States on March 18, 2026