TP-Link T1700G-28TQ—An Economic Choice for SMBs

As new emerging networking standards, 40G and 100G network have been achieved initial success. But they are based on the 10G network. With the growing numbers of small business enterprises, 10G SMB switches are also in a large demand. TP-Link has introduced the T1700 Series 10G Smart Switches: the T1700X-16TS Full 10 Gigabit Smart Switch and the T1700G-28TQ Gigabit Stackable Smart Switch with 10G Uplink. They provide high levels of performance and the increased scalability that meet the requirements of SMBs. This article would introduce the T1700G-28TQ and its compatible optics.

TP-Link T1700G-28TQ Switch

As one of the TP-LINK’s Gigabit stackable smart switches, the T1700G-28TQ is able to provide reliable, cost-effective and resilient networking solutions for SMBs. The switch is equipped with 24 10/100/1000Mbps RJ-45 ports and 4 dedicated 10G SFP+ slots which can be used for uplinks and/or stacking, providing a strong interconnection between access and aggregation.

TP-Link T1700G-28TQ Switch

Figure1:TP-Link T1700G-28TQ Switch(Resource: www.TP-Link.com)

Features & Benefits
—Physical Stacking

The T1700G-28TQ supports rich L2 features, including 802.1Q tag VLAN, Port Isolation, Port Mirroring, STP/RSTP/MSTP, Link Aggregation Groups, and 802.3x Flow Control function. Besides, T1700G-28TQ supports L2+ feature static routing, which provides simple network segmentation by routing internal transmissions to make the ow of network traffic more efficient.

—Abundant L2 and L2+ Features

The stack system of T1700G-28TQs supports up to 40Gbps bi-directional stacking bandwidth with built-in redundancy and auto-failover. The switch supports up to 6 units in a stack, which allows it to provide up to 144 GE ports, 12 available 10G SFP+ uplinks and 768Gbps switching capacity, offering high-density developments as well as flexibility for future network expansion need.

—Secure Networking

The T1700G-28TQ supports IP-MAC-Port Binding, Port Security, Storm control, and DHCP Snooping, which help to protect the network from broadcast storms, ARP attacks, and more. And the switch supports 802.1X, which allows network clients to be authenticated through external Radius servers and the guest VLAN function allows non-802.1X clients to access specific network resources.

—Enterprise Level Management

The T1700G-28TQ is easy to use and manage. It supports various user-friendly standard management features, such as intuitive web-based Graphical User Interface (GUI), industry-standard Command Line Interface (CLI), SNMP (v1/2/3), and RMON. This allows the switch to provide valuable status information and send reports on abnormal events. Comprehensive IPv6 support management ensures a smooth migration to an IPv6-based network. It also supports Dual Image to provide improved reliability and network uptime.

Compatible Optics for TP-Link T1700G-28TQ

As being mentioned, the TP-Link T1700G-28TQ has 24 10/100/1000Mbps RJ-45 ports and 4 dedicated 10G SFP+ slots to achieve network connectivity. And it is a switch supports different optical modules and network cables. For the 10/100/1000Mbps RJ-45 ports, you can use 100BASE-TX or 1000Base-T optical transceiver with UTP category 5, 5e or above cable (maximum 100m) to achieve the link. Besides, you can also use 1000BASE-X with singlemode or multimode fiber cable to connect.

10G optics

Figure2: Optional choices for 10G network

As for the 10G SFP+ ports, there are two approaches to achieve transfer the data. You can choose 10G optical transceivers or 10G Direct Attach Copper (DAC) cables to transfer data. The TP-Link T1700G-28TQ support 10BASE-T with UTP category 3, 4, 5 cable (maximum 100m), 10GBASE-LR and 10GBASE-SR to connect. In addition, you can use TP-LINK TXC432-CU1M or TP-LINK TXC432-CU3M to achieve the link.

The main compatible optical modules and cables are listed in the below:

  • 10BASE-T: UTP category 3, 4, 5 cable (maximum 100m)
  • 100BASE-TX/1000Base-T: UTP category 5, 5e or above cable (maximum 100m)
  • 1000BASE-X: MMF, SMF
  • 10GBASE-LR
  • 10GBASE-SR
  • TP-LINK TXC432-CU1M
  • TP-LINK TXC432-CU3M
Conclusion

TP-Link T1700G-28TQ provides cost-effective solution for 10G SMB networking. This article mainly discussed about its definition, features and benefits as well as compatible optical modules and cables. If you are looking for its compatible optical modules and cables, FS.COM is a nice choice.

Broadcom or Intel Network Adapter for Dell PowerEdge Server?

The NDC, Network Daughter Card (also known as Select Network Adapters), is an innovation technology developed by Dell. As an advanced technology on server, the NDC provides the customers with a flexibility of choosing what they want ( 4 x 1GbE, 2 x 10GbE or 2 x Converged Network Adapter.) With this small, removable mezzanine card, we are no longer limited to use network interface cards (NICs) on the motherboard. And it has been used in the twelfth-generation Dell PowerEdge server. This article will focus on Broadcom or Intel network adapter for Dell PowerEdge Server.

About Select Network Adapter

Network adapter plays an irreplaceable role in a server system, as it can reduce CPU usage on the server, which improves the overall system performance. NDC is a paramount member of Dell PowerEdge Select Network Adapters family. There are two form factors of Select Network Adapters—blade servers and rack servers. (You can see the two servers clearly in the following figure.) The Blade Select Network Adapter provides dual port 10GbE from various suppliers. The Rack Select Network Adapter provides a selection of 1GbE and 10GbE port options, such as 1000Base-T, 10GBASET and 10Gb SFP+.

Rack Mount Servers & Blade Servers

Figure1: Rack Mount Servers & Blade Servers(Resource: www.DELL.com)

PowerEdge Platforms That Support Select Network Adapters

The Blade Select Network Adapter is offered on the PowerEdge M620 blade server.

The Rack Select Network Adapter is offered on the following PowerEdge platforms:

  • R620
  • R720
  • R720xd

PowerEdge R720 Rack Server

Figure2: PowerEdge R720 Rack Server(Resource: www.DELL.com)

Available NDC options
PowerEdge rack servers:
  • Broadcom 5720 Base-T
  • Intel I350 Base-T
  • Broadcom 57800 Base-T and SFP+
  • Intel x540 Base-T
PowerEdge blade servers:
  • Broadcom 57810S KR
  • Intel x520 KR
  • QLogic QMD8262 KR
Form factors of Blade Servers & Rack Servers

Blade servers: There are three form factors of blade servers offered by Dell: Intel x520 Dual Port 10Gb KR NDC, Broadcom 57810S Dual Port 10Gb KR NDC, and QLogic QMD8262-k Dual Port 10Gb KR NDC. Both the Broadcom and Intel blade NDCs will support both 1Gb and 10Gb speeds, while the QLogic blade NDC will run only at 10Gb speeds.

Rack servers: There are mainly two brands of NDC support rack servers—Intel and Broadcom, which would be further explained as follows:

Intel:
  • Intel Ethernet x540 Dual Port 10Gb BT + i350 DP 1Gb BT NDC: A quad-port rack NDC with 2 ports x 1GbE + 2 ports x 10GBASE-T based on the Intel I350 and x540 chipsets.
  • Intel Ethernet i350 Quad Port 1GbE NDC: A quad-port rack NDC with 4 ports x 1GbE based on the Intel I350 chipset.
    An Intel 2x1Gb + 2x10Gb Base-T rack NDC, as shown in the following figure, offers two types of interconnects to meet various connectivity needs.

Rack 2x1Gb+ 2x10Gb BT NDC

Figure3: Rack 2x1Gb+ 2x10Gb BT NDC

Broadcom:
  • Broadcom 57800S 2x1Gb+2x10Gb SFP+ NDC: A quad-port rack NDC with 2 ports x 1GbE + 2 ports x 10G SFP+ based on the Broadcom 57800S chipset. Just shown as the following figure.
  • Broadcom 5720 4x1Gb Base-T NDC: A quad-port rack NDC with 4 ports of 1GbE based on the Broadcom 5720 chipset.

Rack 2x1Gb+ 2x10Gb SFP+ NDC

Figure4: Rack 2x1Gb+ 2x10Gb SFP+ NDC

How to Choose the Optical Cables and Modules for Broadcom or Intel Network Adapter?

Just take Broadcom 57800S 2x1Gb+2x10Gb SFP+ NDC for example. A Broadcom 2 x 1G + 2 x 10G SFP+ NDC provides two 1000BASE-T ports and two 10G SFP+ ports as shown in Figure 6. We can plug two Dell compatible SFP transceivers into the two 1G ports on the Broadcom NDC respectively to achieve 1G network connection. Likewise, we can also connect Dell compatible SFP+ transceiver such as 10Gb Base SR connector to the 10G port on the Broadcom card for making 10G data transferring. Besides, we can also use Direct Attach Cable (DAC) to achieve 10G network connectivity, such as multimode 10Gb fiber optic cable, Dell 10G SFP+ DAC cable. DAC cables provide a cost-effective solution for very short transmission while 10G optical modules are more suitable for data transferring over long distance.

Broadcom 57800S NDC with Dell SFP+ module

Figure5: Broadcom 57800S NDC with Dell SFP+ module

Conclusion

As technology advanced and 10Gb Ethernet became more prevalent in the data center, there must be a prosperous market ahead for blade servers and rack servers. SFP+ modules and Direct Copper Attached is the current preference for 10GbE connectivity of rack servers. Boardcom and Intel are both famous vendors for providing NDCs for Dell PowerEdge Server, you can select a proper one for your server according to your port needs.

 

Which Do You Prefer: 10GBASE-T or SFP+ DAC?

A variety of technological advancements and trends are driving the increasing need for 10 GbE in the data center. IT managers are now faced with the challenge of selecting the appropriate 10-gigabit physical media, as 10 Gigabit Ethernet (10GE) is offered in two broad categories, optical and copper, with the latter being the most commonly used means for connectivity in data centers. This article addresses the tradeoffs between the effective choices in copper connectivity 10GBase-T and SFP+ direct attach cable (DAC).

What is 10GBASE-T and Why Choose It?

10GBASE-T is an IEEE 802.3an standard which supports the creation of technology that is capable of transmitting 10 Gigabit Ethernet up to 100 meters over four pairs of CAT-5 balanced copper cabling system. It is an exciting technology that provides end users with cost-effective media to achieve 10Gbps data rates.

Like all BASE-T implementations, 10GBASE-T works for lengths up to 100 meters, giving IT managers a far greater level of flexibility in connecting devices in the data center. With flexibility in reach, 10GBASE-T can accommodate either top of the rack, middle of row, or end of the row network topologies. This gives IT managers the most flexibility in server placement since it will work with existing structured cabling systems. Because 10GBASE-T is backward-compatible with 1000BASE-T, it can be deployed in existing 1 GbE switch infrastructures in data centers that are cabled with CAT6 and CAT6A (or above) cabling, enabling IT to keep costs down while offering an easy migration path to 10 GbE.

What is SFP+ DAC and the Benefits of It?

SFP+ direct attach cable (DAC) is a fixed assembly that is purchased at a given length, with the SFP+ connector modules permanently attached to each end of the cable. SFP+ DAC provides high performance in 10 Gigabit Ethernet network applications, using an enhanced SFP+ connector to send 10 Gbps data through one paired transmitters and receivers over a thin twinax cable or fiber optic cable. The 10G SFP+ DAC is designed to use the same port as an optical transceiver, but compared with optical transceivers, the connector modules attached to the cable leave out the expensive optical lasers and other electronic components, thus achieving significant cost savings and power savings in short reach applications.

SFP H10GB-CU5M

SFP+ DAC is a low cost alternative to traditional fiber and twisted-pair copper cabling in data center deployments. SFP+ DAC provides better cable management for high-density deployments and enhanced electrical characteristics for the most reliable signal transmission.

10GBASE-T vs 10GBASE SFP + DAC

SFP+ DAC has significantly lower overall cost when you include switch, NIC and cable, however 10GBase-T has more flexibility and can reach longer distance. For data centers, the advantages of SFP+ with DAC are a very good match for today’ s requirements and emerging trends. That’s why SFP+ DAC is being adopted rapidly as best practice for new data centers. For wiring closets, 10GBase – T will be the obvious choice once the demand for bandwidth becomes more acute and once the price and power for 10GBase-T technology comes down.

As one of the most professional optical manufacturers in China, Fiberstore’s solutions for 10 Gigabit Ethernet include 10G SFP+ direct attach fiber cable, 10G SFP+ direct attach copper cable. Besides, we also provide high-quality 10G SFP transceivers, like EX-SFP-10GE-LR, SFP-10G-LR-X, SFP-10G-SR-X, etc.

40G QSFP+ Direct Attach Copper Cables

With the wide deployment of 40 Gigabit Ethernet, the 40G QSFP+ direct attach copper cables are becoming more and more popular due to the compact size, low power and cost-effectiveness. 40G QSFP+ to QSFP+ direct attach copper cables and 40G QSFP+ to 4 x 10G SFP+ direct attach copper cables are hot pluggable and parallel passive / active copper cables for storage, data, and high-performance computing connectivity.

QSFP+ to QSFP+ Direct Attach Copper Cables

QSFP+ to QSFP+ direct attach copper cables are hot-removable and hot-insertable. A cable consists of a cable assembly that connects directly into two QSFP+ modules, one at each end of the cable. The cables use integrated duplex serial data links for bidirectional communication and are designed for data rates up to 40 Gbps. QSFP+ to QSFP+ direct attach copper cables are suitable for very short distances and offer a highly cost-effective way to establish a 40G link between QSFP+ ports of QSFP+ switches within racks and across adjacent racks. These cables connect to a 40G QSFP port of a switch on one end and to another 40G QSFP port of a switch on the other end.

EX-QSFP-40GE-DAC-50CM

QSFP+ to 4 SFP+ Direct Attach Copper Cables

The move from 10G to 40G Ethernet will be a gradual one. It is very likely that one may deploy switches that have 40G Ethernet ports while the servers still have 10G Ethernet ports. For that situation, we should use a QSFP+ to 4 SFP+ direct attach breakout copper cable. These cables connect to a 40G QSFP port of a switch on one end and to four 10G SFP+ ports of a switch on the other end, which allows a 40G Ethernet port to be used as four independent 10G ports thus providing increased density while permitting backward compatibility and a phased upgrade of equipment.

QSFP-4SFP10G-CU1M

Directions for Use

The 40G QSFP+ direct attach copper cables are used to connect switch to switch or switch to server. When we use a fiber optic transceiver and patch cable to establish a fiber link, we should firstly plug the transceiver to the switch and then plug the patch cable to the transceiver. But for a QSFP+ direct attach copper cable, both SFP+ connector and QSFP+ connector can be directly inserted into the switch and don’t need a transceiver at all, which provides a really cost-effective solution for interconnecting high speed 40G switches to existing 10G equipment or 40G switches to 40G switches.

40G-QSFP-Direct-Attach-Breakout-Copper-Cable

40G QSFP+ direct attach copper cables can provide inexpensive and reliable 40G speed connections using copper cables with distances reaching up to 30ft (~10 meters length). Cost of short reach connectivity is significantly reduced by avoiding the more costly fiber transceivers and optical cables. As the main fiber optical manufacturer in China, Fiberstore provides a good selection of 40G QSFP+ copper cables, both passive and active copper cables are available. For longer distances, active copper or optical cables are required. For more information or quotation, please contact us via sales@fs.com.

What Makes 40G QSFP+ AOC So Popular in Data Center

Existing and emerging network technologies are driving the need for high-density optical connectivity solutions to address the trends to optimized cable management and data center real estate usage. In order to satisfy the demands of higher bandwidth and more applications in a variety of cloud computing environments, active optical cable (AOC) has emerged. This article will introduce a very popular type of AOC —40G QSFP+ AOC in data center applications.

What Is 40G QSFP+ AOC

40G AOC, is a type of active optical cable for 40GbE applications that is terminated with 40GBASE-QSFP+ on one end, while on the other end, in addition to QSFP+ connector, it can be terminated with SFP+ connector, LC, SC, FC, and ST connector etc. The 40G QSFP+ AOC is a parallel 40Gbps quad small form factor pluggable (QSFP+) active optical cable, which supplies higher port density and total system cost. The QSFP+ optical modules provide four full-duplex independent transmit and receive channels, each are able of 10Gbps operation 40Gbps aggregate bandwidth of at least 100m multimode fiber. Most DAC assemblies have one module on each end of the cable. But there is a special kind of DAC assembly which may have 3 or 4 modules on one end of the cable. For instance, Cisco QSFP-4X10G-AOC5M compatible QSFP+ to 4SFP+ breakout AOC from Fiberstore has a single QSFP+ module rated for 40-Gbps on one end and four SFP+ modules, each rated for 10-Gbps, on the other end.

QSFP-4X10G-AOC5M

Applications of 40G QSFP+ AOC

Active Optical Cable (AOC) is used for short-range multi-lane data communication and interconnect applications. It uses electrical-to-optical conversion on the cable ends to improve speed and distance performance of the cable without sacrificing compatibility with standard electrical interfaces. The 40G QSFP+ AOC is a high performance, low power consumption integrated cable for short-range multi-lane data communication and interconnect applications, supporting 40G Ethernet, fiber channel and PCIE. It is compliant with the QSFP MSA and IEEE P802.3ba 40GBASE-SR4. It integrates four data lanes in each direction with 40 Gb/s aggregate bandwidth. Each lane is capable of transmitting data at rates up to 10Gb/s with lengths ranging from one to 100 m. With its benefits, 40G QSFP+ AOC is widely used in many fields as well as promoting the traditional data center to step into optical interconnection.

40G QSFP+ AOC vs QSFP+ Optics
  • Cost: 40G AOCs cost lower than SR4 modules and do not need to use with extra fiber patch cables. For instance, HP 720205-B21 compatible QSFP+ to QSFP+ active optical cables are suitable for very short distances and offer a very cost-effective way to establish a 40-gigabit link between QSFP ports of HP switches within racks and across adjacent racks. Besides, when using 40G AOC, there are no cleanliness issues in optical connector and there is no need to do termination plug and test when troubleshooting, which can help user save more time and money.
  • Insertion Loss & Return Loss: Under the same case of transmission distance, the repeatability and interchangeability performances of SR4 module interface are not good as 40G AOC. What’s more, when different fiber optic patch cables plug into the module, it will have the different insertion loss and return loss. Even for the same module, this issue is existed. Of course, the related metrics such as the testing eye pattern will have no significant changes so long as the variation in and conformed to the scope. In contrast, an AOC with good performance is more stable and has better swing performance than SR4 modules in this situation.
Fiberstore AOC Solutions

Fiberstore’s AOCs achieve high data rates over long reaches which are the best solutions for high-performance computing and storage applications. We supply AOC products such as 10G SFP+ AOCs, 40G QSFP+ AOCs, QSFP+ to 4 SFP+ AOCs, QSFP+ to 8 x LC AOCs and 120G CXP AOCs etc. In addition, custom cables are also available in various lengths. Recently, Fiberstore has cut the price of its direct attach cable (DAC) products in order to offer a more cost-effective high speed transmission solution for the old and new customers.