Tag Archives: 100G

Transceiver Solutions for Cisco Catalyst 9300 Series Switch

This year, Cisco unveiled the Catalyst 9000 family, shaping the new era of intent-based networking. The Network. Intuitive. The Cisco Catalyst 9000 Series switches are the next generation of enterprise-class switches built for security, Internet of Things (IoT), mobility, and cloud. The Cisco Catalyst 9000 Series switches come in three main varieties: The Catalyst 9300, the Catalyst 9400 and the Catalyst 9500. Here, the post will give an emphasis on Cisco Catalyst 9400 series switches and transceiver solution for them.

Overview of Cisco Catalyst 9300

The Catalyst 9300 Series is the next generation of the industry’s most widely deployed stackable switching platform. Built for security, IoT, and the cloud, these network switches form the foundation for Cisco’s Software-Defined Access, the leading enterprise architecture. In addition, the Cisco Catalyst 9300-based models support a variety of uplink modules for both copper and fiber uplink support. These models add even more flexibility to the interface choices that you can make in a single Cisco Catalyst 9300 Switch or in a stack of Cisco Catalyst 9300 Switches.

cisco catalyst 9300

Supported Transceiver Modules for Cisco Catalyst 9300

The Cisco Catalyst 9300 Series Switches support optional network modules for uplink ports. All modules are supported across all 9300 platforms:

  • 4 x 1 Gigabit Ethernet network module
  • 4 x 1, 2.5, 5, or 10 Gigabit Ethernet network module
  • 8 x 10 Gigabit Ethernet network module
  • 2 x 40 Gigabit Ethernet network module

100G Solution

Model Number Transceiver Description Interface Max Cable Distance
CFP-100G-SR10 100GBASE-SR10 CFP form factor transceiver module for multi mode fiber, short wavelength over 10 lanes, in the 850-nm wavelength window MTP/MPO-24 Up to 100m on OM3/<150m on OM4
CFP-100G-LR4 100GBASE-LR4 CFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 10km
CFP-100G-ER4 100GBASE-ER4 CFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 40km
QSFP-100G-SR4-S 100GBASE-SR4 QSFP form factor transceiver module for multi mode fiber, short wavelength over 4 lanes, in the 850-nm wavelength window LC duplex 100m
QSFP-100G-CWDM4-S 100GBASE CWDM4 QSFP form factor Transceiver for single mode fiber, 4 CWDM-WDM lanes in the 12761-1331-nm wavelength window LC duplex 2km
QSFP-100G-PSM4-S 100GBASE PSM4 QSFP form factor transceiver module for single mode fiber, short wavelength over 4 lanes, in the 1195-1325-nm wavelength window MTP/MPO-12 500m
QSFP-100G-LR4-S 100GBASE-LR4 QSFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 10km

40G Solution

Model Number Transceiver Description Interface Max Cable Distance
QSFP-40G-SR4 40GBASE-SR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength MTP/MPO 150m on OM4
QSFP-40G-CSR4 40GBASE-CSR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength MTP/MPO 400m on OM4
QSFP-40G-SR4-S 40GBASE-SR4 QSFP+ transceiver module for MMF, 4-lanes, 850-nm wavelength MTP/MPO 150m on OM4
QSFP-40G-SR-BD 40G QSFP Bi-Directional transceiver module for duplex MMF LC duplex 150m on OM4/100m on OM3/30m on OM2
QSFP-40G-ER4 40GBASE-LR4 QSFP40G transceiver module for Single Mode Fiber, 4 CWDM lanes in 1310nm window Muxed inside module LC duplex 40km
QSFP-40GE-LR4 100GBASE-LR4 QSFP form factor transceiver module for SMF, 4 LAN-WDM lanes in the 1310-nm wavelength window LC duplex 10km
WSP-Q40GLR4L 40GBASE-LR4 QSFP40G transceiver module for Single Mode Fiber, 4 CWDM lanes in 1310nm window Muxed inside module LC duplex 2km

25G Solution

Model Number Transceiver Description Connector Type Cable Type
SFP-H25G-CU1M 25G Copper Cable 1-meter SFP28 to SFP28 Passive Copper Cable
SFP-H25G-CU2M 25G Copper Cable 2-meter SFP28 to SFP28 Passive Copper Cable
SFP-H25G-CU3M 25G Copper Cable 3-meter SFP28 to SFP28 Passive Copper Cable
SFP-H25G-CU5M 25G Copper Cable 2-mete SFP28 to SFP28 Passive Copper Cable
SFP-25G-SR-S 25GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength LC duplex MMF

10G Solution

Model Number Transceiver Description Interface Max Cable Distance
SFP-10G-SR 10GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength LC duplex 300m over OM3
SFP-10G-SR-S 10GBASE-SR SFP+ transceiver module for MMF, 850-nm wavelength LC duplex 300m over OM3
SFP-10G-SR-X 10GBASE-LRM SFP+ transceiver module for MMF and SMF, 1310-nm wavelength LC duplex 300m over OM3
SFP-10G-LRM 10GBASE-LRM SFP+ transceiver module for MMF and SMF, 1310-nm wavelength LC duplex 220m
SFP-10G-LR 10GBASE-LR SFP+ transceiver module for SMF, 1310-nm wavelength LC duplex 10km
SFP-10G-LR-S 10GBASE-LR SFP+ transceiver module for SMF, 1310-nm wavelength LC duplex 10km
SFP-10G-LR-X 10GBASE-LR SFP+ transceiver module for SMF, 1310-nm wavelength LC duplex 10km
SFP-10G-ER-S 10GBASE-ER SFP+ transceiver module for SMF, 1550-nm LC duplex 40km
SFP-10G-ZR 10GBASE-ZR SFP+ transceiver module for SMF, 1550-nm LC duplex 80km
SFP-10G-BX40D-I 10G SFP+ Bidirectional for 40km, downstream LC duplex 40km
SFP-10G-BX40U-I 10G SFP+ Bidirectional for 40km, upstream LC duplex 40km
DWDM-SFP10G-49.32 10GBASE-DWDM 1549.32 nm SFP+ (100-GHz ITU grid) LC duplex 40km
DWDM-SFP10G-60.61 10GBASE-DWDM 1560.61 nm SFP+ (100-GHz ITU grid) LC duplex 40km
CWDM-SFP10G-1470 CWDM 1470 nm SFP+ 10 Gigabit Ethernet Transceiver Module LC duplex 20km
CWDM-SFP10G-1490 CWDM 1490 nm SFP+ 10 Gigabit Ethernet Transceiver Module LC duplex 20km
XENPAK-10GB-ER 10GBASE-ER XENPAK transceiver module for SMF, 1550-nm wavelength SC duplex 40km
XENPAK-10GB-LR 10GBASE-LR XENPAK transceiver module for SMF, 1310-nm wavelength SC duplex 10km
X2-10GB-LR 10GBASE-LR X2 transceiver module for SMF, 1310-nm wavelength SC duplex 10km
X2-10GB-SR 10GBASE-SR X2 transceiver module for MMF, 850-nm wavelength SC duplex 300m over OM3 MMF
XFP-10GLR-OC192SR Cisco multirate XFP transceiver module for 10GBASE-LR Ethernet and OC-192/STM-64 short-reach (SR-1) Packet-over-SONET/SDH (POS) applications,SMF LC duplex 10km
XFP-10GER-OC192IR Cisco multirate XFP transceiver module for 10GBASE-ER Ethernet and OC-192/STM-64 intermediate-reach (IR-2) Packet-over-SONET/SDH (POS) applications, SMF LC duplex 40km

Conclusion

Digital disruption is changing how we think about our networks. Whether customers or employees, the “experience” has become a strategic imperative. The Cisco Catalyst 9300 Series fixed access switches are designed to help you change your network from a platform of connectivity to a platform of services. If you are in need of compatible optical transceivers for Catalyst 9300, give FS.COM a shot. FS.COM provides a wide range of supported optical transceivers for Cisco Catalyst 9300 series switch. Each one of them has been tested with assured 100% compatibility to them.

The Newly Released 25GbE Ethernet Standard

As the increasing bandwidth requirements of private and public cloud data centers and communication service providers, 25Gbps Ethernet over a single lane will have a significant impact on server interconnect interfaces. It may become the new upgrade path to 100G (10G-25G-100G instead of 10G-40G-100G). This article will give brief introduction about 25GbE Ethernet.

What’s 25GbE Ethernet

25GbE Ethernet standard is proposed for connectivity in the data centers. Because of the increasing demand for higher speed network performance and maintaining Ethernet economics, IEEE agreed to support the development of 25GbE standard in June 2014. 25G Ethernet is defined for 100GbE implemented as four 25Gbps lanes running on four fiber or copper pairs. 100G Quad small for-factor pluggable transceiver (QSFP28) have four lasers, each transmitting 25Gbps. The twisted pair pair standard was derived from 40GbE standards development. The following table shows the main upcoming interfaces for 25Gbps.

25G-strandard-interface

Number of Lanes 40G QSFP+ interface is constructed from four parallel links. Extending QSFP+ onto fiber requires four parallel 10Gb streams to transport this to the receiving QSFP+ parallel optics. The data transmission is achieved by four lanes which significantly reduce switch port density per switching chip and increases the cost of cabling and optics. While the 25GbE standard requires only a single lane, while delivering 2.5 times more throughput compared to current 10GbE solutions and significantly saving the cost compared to 40GbE solutions.

Form Factors The 25GbE physical interface specifications support the form factors including QSFP28 and SFP28. QSFP28 has four lanes and each lanes supports 25 Gbps speed. SFP28 has only one lane and it also supports 25 Gbps speed. Current switch doesn’t support 25G SFP28 port. So the solution for 25G is to use a breakout cable that allows four 25GbE ports to connect to a 100GbE QFSFP28 switch port.

Benefits of 25GbE Ethernet

First, more data and switch port density. Compared with 10G solution, 25GbE standard can provide 2.5 times more data. And it can also offer 4 times switch port density compared to 40G solution. Second, save the cost. Since it can provide greater port density, fewer ToR switches and cables are needed. In that way, it reduces the construction cost compared with 40GbE. Third, it features lower power and smaller footprint requirements. Due to these special benefits, 25GbE is believed to be popular in no time. According to a recent five-year forecast, it’s said that annual shipments of 25GbE ports will be 2.5 times greater than 40GbE ports by 2018.

25G-forecast

25G Solutions

Fiberstore (FS.COM) has released 25G DAC (direct attach copper) cables which include 100G QSFP28 to 4xSFP28 and 25G SFP28 to SFP28 with the length from 1 m to 5 m. QSFP28 refers to the 100G DAC cable using the QSFP+ form factor, and SFP28 refers to the 25G DAC cable using the SFP+ form factor. The form factor remains the same but the new standard will require improved cables and connectors capable of handling additional bandwidth. Existing QSFP+ and SFP+ cable assemblies are not compatible with QSFP28 and SFP28 ports. 25G DAC is designed as the low-cost copper connection for ToR switches.

25G-dac cable

It’s certain that Fiberstore will soon release 25GBASE-T interface equipment. 25GBASE-T can support 30 meters long reach with low cost. It’s a cost-effective solution for ToR server connections using point-to-point patch cords, and enable End of Row (EoR) or Middle of Row (MoR) by using the 30 meter structured cabling. The connection can be achieved with the common use of RJ45 plug and connector. Compared with 25G DAC, it seems to be a more suitable way.

Conclusion

25GbE can provide up to 2.5 times faster performance than existing 10GbE connections while maximizing the Ethernet controller bandwidth/ pin and switch fabric capability. It can also provide greater port density with lower cost compared to 40GbE solutions. It’s analyzed that 25G will limit the deployment of 40G QSFP+ ports. By now, FS.COM has released 100G QSFP28 to 4xSFP28 and 25G SFP28 to 25G SFP28 DAC cables for 25G network. In the near future, there will more equipment for 25G including 25GBASE-T transceiver. Let’s look forward to it.

WBMMF – Next Generation Duplex Multimode Fiber in the Data Center

Enterprise data center and cloud operators use multimode fiber for most of their deployments because it offers the lowest cost means of transporting high data rates for distances aligned with the needs of these environments. The connections typically run at 10G over a duplex multimode fiber pair—one transmit (Tx) fiber and one receive (Rx) fiber. Upgrading to 40G and 100G using MMF has traditionally required the use of parallel ribbons of fiber. While parallel transmission is simple and effective, continuation of this trend drives higher cost into the cabling system. However, a new generation of multimode fiber called WBMMF (wideband multimode fiber) is on the way, which can enable transmission of 40G or 100G over a single pair of fibers rather than the four or ten pairs used today. Now, let’s get close to WBMMF.

What Is Wideband Multimode Fiber?
WBMMF is a new multimode fiber type under development that will extend the ability of conventional OM4 multimode fiber to support multiple wavelengths. Unlike traditional multimode fiber, which supports transmission at the single wavelength of 850 nm, WBMMF will support traffic over a range of wavelengths from 850 to 950 nm. This capability will enable multiple lanes of traffic over the same strand of fiber to transmit 40G and 100G over a single pair of fibers and to drastically increase the capacity of parallel-fiber infrastructure, opening the door to 4-pair 400GE and terabit applications. Multimode fiber continues to provide the most cost-effective platform for high bandwidth connectivity in the data center, and with the launch of the WBMMF solution, that platform has been extended to support higher speeds with fewer fibers and at greater distances.

Wideband Multimode Fiber

What Is the Technology Behind WBMMF?
WBMMF uses short wavelength division multiplexing (SWDM) to significantly increase its transmission capacity by four times. WDM technology is well known for its use in single-mode transmission, but has only recently been adapted for use with vertical cavity surface-emitting lasers (VCSELs), which have been proven in high-speed optical communications and are widely deployed in 10G interconnection applications. SWDM multiplexes different wavelengths onto duplex MMF utilizing WDM VCSEL technology. By simultaneously transmitting four VCSELs, each operating at a slightly different wavelength, a single pair WBMMF can reliably transfer 40G (4x10G) or 100G (4x25G). The use of SWDM then enables WBMMF to maintain the cost advantage of multimode fiber systems over single-mode fiber in short links and greatly increases the total link capacity in a multimode fiber link.

SWDM WBMMF

Why Does WBMMF Make Sense?
In order to increase transmission speeds up to 10G or 25G, transceiver vendors simply increased the speed of their devices. When 40G and 100G standards were developed, transmission schemes that used parallel fibers were introduced. This increase in fiber count provided a simple solution to limitations of the technology available at the time. It was accepted in the industry and allowed multimode links to maintain a low cost advantage. However, the fiber count increase was not without issues. At some point, simply increasing the number of fibers for each new speed became unreasonable, in part because the cable management of parallel fiber solutions, combined with the increasing number of links in a data center, becomes very challenging. Please see the picture below. Usually, 40G is implemented using eight of the twelve fibers in an MPO connector. Four of these eight fibers are used to transmit while the other four are used to receive. Each Tx/Rx pair is operating at 10G. But if we use WDMMF, two fibers are enough. Each Tx/Rx pair can transmit 40G by simultaneously transmitting four different wavelengths. This enables at least a four-fold reduction in the number of fibers for a given data rate, which provides a cost-effective cabling solution for data center.

Parallel fibers vs WBMMF

Conclusion
WBMMF is born at the right moment to meet the challenges associated with escalating data rates and the ongoing need to build cost-effective infrastructure. Besides, WBMMF will support existing OM4 applications to the same link distance. Optimized to support wavelengths in the 850 nm to 950 nm range to take advantage of SWDM, WBMMF ensures not only more efficient support for future applications to useful distances, but also complete compatibility with legacy applications, making it an ideal universal medium that supports not only the applications of the present, but also those of the future.

Original article source: http://www.cables-solutions.com/wbmmf-next-generation-duplex-multimode-fiber-in-the-data-center.html

Fusion Splicing–A Popular Option for Data Center

Fusion splicingAs fiber deployment has become mainstream, splicing has naturally crossed from the outside plant (OSP) world into the enterprise and even the data center environment. Fusion splicing involves the use of localized heat to melt together or fuse the ends of two optical fibers. The preparation process involves removing the protective coating from each fiber, precise cleaving, and inspection of the fiber end-faces. Fusion splicing has been around for several decades, and it’s a trusted method for permanently fusing together the ends of two optical fibers to realize a specific length or to repair a broken fiber link. However, due to the high costs of fusion splicers, it has not been actively used by many people. But these years some improvements in optical technology have been changing this status. Besides, the continued demand for increased bandwidth also spread the application of fusion splicing.

New Price of Fusion Splicers
Fusion splicers costs have been one of the biggest obstacles to a broad adoption of fusion splicing. In recent years, significant decreases in splicer prices has accelerated the popularity of fusion splicing. Today’s fusion splicers range in cost from $7,000 to $40,000. The highest-priced units are designed for specialty optical fibers, such as polarization-maintaining fibers used in the production of high-end non-electrical sensors. The lower-end fusion splicers, in the $7,000 to $10,000 range, are primarily single-fiber fixed V-groove type devices. The popular core alignment splicers range between $17,000 and $19,000, well below the $30,000 price of 20 years ago. The prices have dropped dramatically due to more efficient manufacturing, and volume is up because fiber is no longer a voodoo science and more people are working in that arena. Recently, more and more fiber being deployed closer to the customer premise with higher splice-loss budgets, which results in a greater participation of customers who are purchasing lower-end splicers to accomplish their jobs.

More Cost-effective Cable Solutions
The first and primary use of splicing in the telecommunications industry is to link fibers together in underground or aerial outside-plant fiber installations. It used to be very common to do fusion splicing at the building entrance to transition from outdoor-rated to indoor-rated cable, because the NEC (National Electrical Code) specifies that outdoor-rated cable can only come 50 feet into a building due to its flame rating. The advent of plenum-rated indoor/outdoor cable has driven that transition splicing to a minimum. But that’s not to say that fusion splicing in the premise isn’t going on.

Longer distances in the outside plant could mean that sticking with standard outdoor-rated cable and fusion splicing at the building entrance could be the more economical choice. If it’s a short run between building A and B, it makes sense to use newer indoor/outdoor cable and come right into the crossconnect. However, because indoor/outdoor cables are generally more expensive, if it’s a longer run with lower fiber counts between buildings, it could ultimately be cheaper to buy outdoor-rated cable and fusion splice to transition to indoor-rated cable, even with the additional cost of splice materials and housing.

As fiber to the home (FTTH) applications continue to grow around the globe, it is another situation that may call for fusion splicing. If you want to achieve longer distance in a FTTH application, you have to either fusion splice or do an interconnect. However, an interconnect can introduce 0.75dB of loss while the fusion splice is typically less than 0.02dB. Therefore, the easiest way to minimize the amount of loss on a FTTH circuit is to bring the individual fibers from each workstation back to the closet and then splice to a higher-fiber-count cable. This approach also enables centralizing electronics for more efficient port utilization. In FTTH applications, fusion splicing is now being used to install connectors for customer drop cables using new splice-on connector technology and drop cable fusion splicer.

FTTH drop cable fusion splicer

A Popular Option for Data Centers
A significant increase in the number of applications supported by data centers has resulted in more cables and connections than ever, making available space a foremost concern. As a result, higher-density solutions like MTP/MPO connectors and multi-fiber cables that take up less pathway space than running individual duplex cables become more popular.

Since few manufacturers offer field-installable MTP/MPO connectors, many data center managers are selecting either multi-fiber trunk cables with MTP/MPOs factory-terminated on each end, or fusion splicing to pre-terminated MTP/MPO or multi-fiber LC pigtails. When you select trunk cables with connectors on each end, data center managers often specify lengths a little bit longer because they can’t always predict exact distances between equipment and they don’t want to be short. However, they then have to deal with excess slack. When there are thousands of connections, that slack can create a lot of congestion and limit proper air flow and cooling. One alternative is to purchase a multi-fiber pigtail and then splice to a multi-fiber cable.

Inside the data center and in the enterprise LAN, 12-fiber MPO connectors provide a convenient method to support higher 40G and 100G bandwidth. Instead of fusing one fiber at a time, another type of fusion splicing which is called ribbon/mass fusion splicing is used. Ribbon/mass fusion splicing can fuse up to all 12 fibers in one ribbon at once, which offers the opportunity to significantly reduce termination labor by up to 75% with only a modest increase in tooling cost. Many of today’s cables with high fiber count involve subunits of 12 fibers each that can be quickly ribbonized. Splicing those fibers individually is very time consuming, however, ribbon/mass fusion splicers splice entire ribbons simultaneously. Ribbon/mass fusion splicer technology has been around for decades and now is available in handheld models.

Ribbon/Mass Fusion Splicer

Conclusion
Fusion splicing provides permanent low-loss connections that are performed quickly and easily, which are definite advantages over competing technologies. In addition, current fusion splicers are designed to provide enhanced features and high-quality performance, and be very affordable at the same time. Fiberstore provides various types and uses of fusion splicers with high quality and low price. For more information, please feel free to contact us at sales@fs.com.

Original article source:
http://www.cables-solutions.com/the-era-of-fusion-splicing-is-coming.html