Spend Less on Building 100GbE Network With QSFP28 AOC

Currently 10GbE and 40GbE network are efficient and enough for some users. However, to some large-scale data centers, 40GbE Internet speed can’t meet their demands as the Internet continues to grow in size and traffic. According to research predicts, global data center Internet protocol traffic will grow by 31% every year within next five years. So 100GbE technology will become the mainstream in the near future. Cisco, Juniper, Arista provide 100GbE switches, routers and supported QSFP28 transceiver, QSFP28 AOC. But many enterprises still can’t upgrade to 100GbE network since the switch and QSFP28 AOC are quite expensive. Don’t worry about the high cost. This article will help you find a way to spend less on building 100GbE network with QSFP28 AOC.

QSFP28 AOC

100GbE QSFP28 AOC is composed of an OM4 multimode cable connecting two QSFP28 connectors on each end. The form factor design is easy for plugging and removal. The QSFP28 AOC is compliant to the QSFP MSA (multi-source agreement). QSFP28 AOCs support 100G QSFP28 standards and are available in various lengths (usually from 1-30 meters). 100G QSFP28 AOCs provide an affordable low-power alternative to interconnect 100G QSFP28 ports in data center applications. It’s useful for simplified intra rack and inter rack configurations. The following table lists 100GbE QSFP28 AOC of several famous brands.

QSFP28 AOC

Brands QSFP28 AOC Price
Cisco QSFP-100G-AOC (1m-30m) Above US$ 1,000
Arista AOC-Q-Q-100G (1m-30m) Above US$ 3,000
Juniper JNP-QSFP28-AOC (1m-30m) Above US$ 2,000
FS.COM QSFP28 AOC (1m-30m) From US$ 540 to US$ 630

Table 1. QSFP28 AOC Price Comparison

Switches Supporting QSFP28 AOC

Cisco, Arista, Juniper are three famous fiber optic transceiver manufactures. Transceiver modules and switches of these brands are very common in the market. As the demand for 100GbE data center keeps moving, these manufactures produce switches including 100GbE QSFP28 ports. Here I list four switches which can support QSFP28 AOC, Cisco Nexus 7700, Arista 7500R, Juniper QFX5110 and FS.COM S5850-48S2Q4C.

  • Cisco Nexus 3232C—The Cisco Nexus 3232C switch is a low latency, dense, high-performance 100GbE switch designed for data center. It can not only meet customers’ current network needs but also suitable for future applications such as big data, cloud and virtualization. Each of 32 100GbE QSFP28 ports can operate at 10, 25, 40, 50, 100 GbE.
  • Arista 7500R—Arista 7500R switches (7500R-36CQ, 7500R-36Q, 7500R-48S2CQ) is designed to lower power per 100GbE port and produce more reliable and dense network. The switches are available in a compact system design of 12, 8 and 4 slot. 7500R-36CQ has 36-port 100GbE QSFP line card. 7500R-36 owns 1/10GbE line card with two 100GbE QSFP28 ports. 7500R-48S2CQ is available with up to 6 100GbE QSFP28 ports.
  • Juniper QFX5110—Juniper provides two switches with 100GbE port: QFX5110-48S and QFX5110-32Q. QFX5110-48S is a 10GbE/100GbE data center access switch offering 48x10GbE SFP+ port and 4x100GbE QSFP28 ports. QFX5110-32Q offers up to 32x40GbE QSFP+ ports, or 20x40GbE QSFP+and 4x QSFP28 ports.
  • FS.COM offers two switches for 100GbE network: S5850-48S2Q4C and S8050-20Q4C. S5850-48S2Q4C provides 48x10GbE SFP+ ports, 2x40GbE QSFP+ ports and 4x100GbE QSFP28 ports. S8050-20Q4C has 2x40GbE QSFP+ ports and 4x100GbE QSFP28 ports.
Switch Brands Model Supported QSFP28 AOC Switch Price
Cisco Nexus 3232C QSFP-100G-AOC (1m-30m) About US$ 19,500.00
Arista 7500R-36CQ 100GBASE-AOC(3m to 30m)gggg Average US$ 60,000.00
7500R-36Q
7500R-48S2CQ
Juniper QFX5110-48S QSFP28 AOC (10 m)gg Above US$ 16,500.00
QFX5110-32Q
FS.COM S5850-48S2Q4C Generic QSFP28 AOC (1m-30m) US$ 6,900.00
S8050-20Q4C

Table 2. Price Comparison of Switches Supporting QSFP28 AOC

Spend Less With FS.COM Switches and QSFP28 AOC

Based on Table 1 and Table 2, to build a 100GbE network with QSFP28 AOC will cost a lot, especially when you require for products from Cisco, Arista and Juniper manufacturers. By comparison, you can see the price of FS.COM switches for 100GbE network and QSFP28 AOC is quite lower. So FS.COM can help you spend less on building 100GbE network with QSFP28 AOC. But if you have already owned Cisco, Arista or Juniper switches, you can buy compatible QSFP28 AOCs which are more cost-effective and have been tested to assure 100% compatibility.

Originally published at http://www.fiber-optic-equipment.com

How to Convert SFP+ to 10GBASE-T/RJ45?

When migrating to 10G data center, you may have two choices: SFP+ or 10GBASE-T technology. 10GBASE SFP+ interface has always been widely deployed for 10 Gigabit ToR (top of rack) witches due to low power consumption. Due to advanced technology, switch manufacturers significantly reduce the power consumption and cost of 10GBASE-T server and switch. According to some researches, the cost of 10GBASE-T (RJ45 interface) switches is much lower than that of SFP+ switches. So many users prefer to add 10GBASE-T/RJ45 switches. But the problem is how to convert SFP+ to RJ45 port. This article will to introduce a necessary optical equipment–SFP+ to RJ45 media converter.

Introduction to SFP+ to RJ45 Media Converter

The secret to realize SFP+ to RJ45 conversion is 10 Gigabit SFP+ to RJ45 media converter. This converter has one 10G pluggable SFP+ port and one RJ45 port. SFP+ port is compatible with any SFP+ transceiver such as 10G SR SFP, 10G LR SFP and so on, which is the best suitable for your network and link lengths. 10 Gigabit SFP+ to RJ45 media converter is a cost-effective way to convert copper to fiber, or fiber to copper. Since it can deliver fast and reliable network access at longer distances than copper-based networks, it’s ideal for the applications in server rooms, workstations in remote areas or in other buildings.

sfp+ to-rj45 card

How to Convert SFP+ to RJ45?

As the following figure shows, existing ToR switch only has some SFP+ interfaces. This switch is connected to an aggregation switch in the data center with multimode fiber patch cords. And the servers below are connected to the ToR switch with twinax DAC cables. Now considering that 10GBASE-T servers are less expensive, we decide to add new 10GBASE-T servers to the rack. Then we face a problem: how to integrate 10GBASE-T RJ45 ports servers into the the rack? To deal with this problem, we need to add 10 Gigabit Ethernet media converters to this rack system. First, connect the media converter with existing ToR switch by inserting one end of twinax DAC cables into the SFP+ port of the 10 Gigabit Ethernet media converter. Second, connecting media converter with the new 10GBASE-T servers by plugging Ethernet patch cords (better Cat6a) into RJ45 port of this media converter and 10GBASE-T servers.

sfp+ to rj45

As the 10GBASE-T servers are connected to 10 Gigabit SFP+ to RJ45 media converters over short Ethernet patch cords, so we can enjoy the advantage of 10GBASE-T short reach mode, which means all devices can operate at lower transmit power. Short reach mode, specified in the IEEE 10GBASE-T standard, conserves energy and produces less heat.

FS.COM SFP+ to RJ45 Media Converter Solutions
Part number Description
21024 1x 10GBase-T to 1x 10GBase-X SFP+, Unmanaged
35609 1x 10GBase-T to 1x 10GBase-X XFP Unmanaged
35432 1x 10GBase-T to 1x 10GBase-X SFP+, Card Type
35433 1x 10GBase-T to 1x 10GBase-X XFP, Card Type
35610 1x 10GBase-T to 1x 10GBase-X SFP+ Managed
35431 1x 10GBase-T to 1x 10GBase-X XFP Managed
Conclusion

SFP+ to RJ45 conversion may be a very common issue in 10G data center. To solve this problem, the most cost-effective way is SFP+ to RJ45 media converter. It can bridge the interface disparities between equipment with 10GBASE-T RJ45 ports and existing rack servers or switches with fiber optic ports. FS.COM offers various high-performance 10G SFP+ to RJ45 media converters. For more product details, please contact us via email sales@fs.com.

Related article: 10G SFP or 10GBASE-T SFP for 10GbE Network?

Originaly published at http://www.fiber-optic-equipment.com

How to Understand Tx Power and Rx Power of a Fiber Transceiver?

As we all know, single mode fiber optic transceiver is designed for long distance data transmission and multimode fiber optic transceiver is for short distance link. How to calculate the specific distance that a fiber optic transceiver can support at a certain occasion? What factors are crucial to the transmission distance? Do you have any idea of Tx (transmit) power and Rx (receive) power level of a fiber optic transceiver? This article will show you by introducing 10GBASE-SR SFP+ and 10GBASE-LR SFP module.

Tx Power and Rx Power of a Fiber Transceiver

First, let’s understand the most two important factors of the fiber optic transceiver: Tx power and Rx power. The optical Tx power is the signal level leaving that device and it should be within the transmitter power range. The Rx power is the incoming signal level being received from the far end device and it should fall within the receive power range.

10GBASE-SR SFP+ is a multimode fiber transceiver and can support the distance of 300 m over OM3 multimode fiber patch cable. While 10GBASE-LR SFP module is a single mode type and can run the network distance up to 10 km over single mode fiber patch cords. Before purchasing 10GBASE SFP+ module, you must carefully read the product details. The following lists the product details about 10GBASE-SR SFP+ and 10GBASE-LR SFP module from Fiberstore. As showing below, Tx power of this Cisco compatible 10GBASE-SR SFP+ is between -7.3 dB and 1 dB. The maximum receive power is below -11.1 dB. With regard to Cisco compatible 10GBASE-LR SFP module, Tx power is from -8.2 to 0.5 dB and the maximum Rx power is -14.4 dB

Tx Power and Rx Power of 10GBASE-SR SFP+

Tx Power and Rx Power of 10GBASE-SR

Tx Power and Rx Power of 10GBASE-LR SFP+ Module
Tx Power and Rx Power of 10GBASE-LR
Tx Power and Rx Power VS. Optical Power Budget

To calculate the specific distance of a fiber optic transceiver, we need to know its optical power budget (maximum allowable loss).

Optical power budget = Tx power – Rx power

Therefore, according to the Tx power and Rx power, we can calculate the maximum allowable loss of 10GBASE-SR SFP+ and 10GBASE-LR SFP module.

Optical Power Budget of 10GBASE-SR SFP+

Min Tx Power = -7.3 dB
Max Rx Power = -11.1 dB
Optical power budget (maximum allowable loss) = (-9.5 dB) – (-11.1 dB)=1.6 dB

Optical Power Budget of 10GBASE-LR SFP+ Module

Min Tx Power = -8.2dB
Max Rx Power = -14.4 dB
Optical power budget (maximum allowable loss) = (-8.2 dB) – (-14.4 dB)=6.2 dB

Tx Power and Rx Power VS. Transmission Distance

Except optical power budget, we have to consider other factors including the link length, fiber optical connectivity components, fusion splicing points and some unpredictable fiber attenuation caused by fiber patch cable bending (usually the attenuation is about 3 dB). The loss of each connector is 0.6 dB and 0.1 dB of each fusion splicing point. Suppose we use 10GBASE-LR SFP+ module to build a network covering 2 connectors, 4 fusion splicing points. This module is interfaced with LC single mode fiber patch cord. If the single mode fiber cable has the wavelength of 1310 nm, the cable loss is about 0.35 dB per kilometer.

The worst optical loss = Power Budget – Total Optical Power Loss=6.2 dB – 1.2dB (2×0.6 dB) – 0.4dB (0.1×4) – 3dB (safety factor) = 1.6 dB
Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/km]=1.6dB/0.35dB/km
So we can get 10GBASE-LR SFP+ module can support at least 4.57 km at this occasion. Data transmission distance is mainly influenced by the optical power budget and fiber cable loss. From the above content, the optical power budget of 10GBASE-SR SFP+ is smaller than that of 10GBASE-LR SFP+ module. The more the optical power budget, the further the fiber transceiver can support. What’s more, the cable loss of multimode fiber cable is larger than that of single mode fiber cable. Obviously 10GBASE-LR SFP+ module can support longer link distance than 10GBASE-SR SFP+.

network building

Note: The optical power budget is based on a theoretical calculation, and is just for reference. The transmission distance should be calculated based on the power budget of fiber transceiver module tested on the switch and some practical attenuation.

Conclusion

Tx power and Rx power level of a transceiver are the main factors of transmission distance. The more the optical power budget, the better the transceiver. Before purchasing a transceiver, you’d better calculate the optical power budget according to transceiver module details.

Originally published at http://www.fiber-optic-equipment.com

Why not Use Third-party Fiber Transceivers for Your Ubiquiti Switches?

Ubiquiti is famous for its switches such as Edge Switch, Edge Router, UniFi switch. Last year, this manufacturer officially released its own SFP and SFP+ fiber optic transceivers which are compatible with their switches. At the same time, it’s said that fiber transceivers from some fiber optic transceiver manufacturers such as Fiberstore can support Ubiquiti switches. This article will discuss what kind of third-party fiber transceivers are compatible with Ubiquiti switches and which fiber optic transceiver manufacturers is the most reliable.

Ubiquiti Fiber Transceivers

Ubiquiti switches are specially designed for 1G and 10G network. They didn’t produce their own fiber transceivers until last year. They only provide a small amount of single mode and multimode fiber transceivers. UF-MM-1G and UF-SM-1G-S are designed for SFP ports on Ubiquiti switches. And fiber transceivers like UF-MM-10G, UF-SM-10G, UF-SM-10G-S are for Ubiquiti switches’ SFP+ ports.

Third-party Fiber Transceivers For Ubiquiti Switches

Except their own SFP or SFP+ transceivers, those from other fiber optic transceiver manufacturers like Cisco, Dell, HP, Finisar, Brocade have been tested to be compatible with Ubiquiti switches by some users. Cisco, the world famous fiber optic transceiver manufacturer, has seven SFPs supporting Ubiquiti switches, Cisco GLC-LH-SM 30-1299-01 SFP, Cisco GLC-SX-MM, Cisco GLC-SX-MM 1000BASE-SX SFP, Cisco SFP-H10GB-CU1M, Cisco MGBSX1 Gigabit SX Mini-GBIC SFP Transceiver and Cisco GLC-T. Besides, for 10G network, Cisco SFP-10G-SR can be plugged in SFP+ ports on their switches.

Fiberstore Fiber Transceivers For Ubiquiti Switches

Fiberstore also has a wide variety of SFP and SFP+ transceivers compatible for Ubiquiti switches. Users have recommended some SFPs and SFP+s from Fiberstore, for instance, SFP1G-LX-31 1310nm (single mode SFPs), SFP-1G85-5M (multi-mode), SFP-GB-GE-T Module, SFP-10G85-3M (multi-mode).

Comparison Between Ubiquiti and Fiberstore Fiber Transceiver

There are so many third-party transceiver manufacturers providing compatible fiber transceivers fro Ubiquiti switches. But which fiber transceiver supplier should you choose? The answer is Fiberstore. Now let’s see why Fiberstore is more advantageous by comparing Ubiquiti with Fiberstore fiber transceiver.

    • Fiber Transceiver Category—Ubiquiti has only one single mode SFP and one multimode SFP. As to SFP+ transceivers, there only two single mode modules and one multimode module. The fiber transceiver category is very limited. While users have plenty of choices for SFPs and SFP+s from Fiberstore. As mentioned above, Ubiquiti switches support some fiber transceivers from third-party fiber optic transceiver manufacturers. Fiberstore offers many compatible brands like Cisco, Dell, HP, Finisar, Brocade, etc. Those SFPs and SFP+s have been tested to be suitable for Ubiquiti switches.
    • Fiber Transceiver Quality—Some fiber optic transceiver manufacturers produce SFP and SFP+ transceivers with low price. However, the quality of those fiber transceivers can’t be assured. In our test center, we have switches from Cisco, Dell, Extreme, Juniper and other famous brands. Every fiber transceiver offered by Fiberstore before shipping has to go through strict test to assure 100% compatibility and high performance.

fs fiber transceiver

    • Fiber Transceiver Price—Except fiber transceiver quality, fiber transceiver price is another important factor to be considered. Compare fiber transceiver price of Fiberstore with that of other fiber optic transceiver manufacturers, it’s obvious that Fiberstore has more advantages. That’s one of the reasons why Fiberstore wins popularity among customers. You can check the following screenshots about the the feedback from customers.


customer review2

Conclusion

If you have to purchase fiber transceiver for your Ubiquiti switches, you can get SFP or SFP+ from Ubiquiti. Or you can buy from third-party fiber optic transceiver manufacturers. How to choose a reliable supplier from so many fiber transceiver manufacturers? When buying fiber transceiver, the quality, price, and after-sales service should be considered. As one of fiber optic transceiver manufacturers, Fiberstore is suggested to be a good choice for fiber transceiver needs. For more information about FS.COM fiber transceiver, please visit our site http://www.fs.com or contact us via sales@fs.com.

Originaly published at http://www.fiber-optic-equipment.com