Author Archives: Miko.Wang

Wireless Network vs. Wired Network: Which One to Choose?

Our home networks rely on either wired (Ethernet) or wireless technology. Sometimes, we use both of them, especially when multiple Internet capable devices are set up in homes. Wireless networks enable multiple devices to use the same internet connection remotely, as well as share files and other resources. But it’s still hard to say wireless is better than wired, since each one has advantages and drawbacks. This article is meant to compare wireless and wired technology from three primary factors: mobility, reliability, and security.

wireless network anywhere

Wireless Network vs. Wired Network

wired network vs wireless network

Mobility

A wired LAN (Local Area Network) uses Ethernet cables to connect computers together directly or more commonly, through a hub, switch, or router. Wired connections typically cost much less and reduce battery drain on laptops and other mobile devices because Wi-Fi adapters use more power.

As for wireless network, users can move around freely within the area of the network with their laptops, handheld devices etc and get an internet connection. The popularity of Wi-Fi has also increased due to increased smartphone and tablet sales. Many of these devices are not capable of wired Ethernet connections and rely on wireless signals for Internet connectivity.

Reliability

Ethernet-based(wired) networks tend to be much more reliable than wireless networks. The backbone of any network relies on an Ethernet connection. The most common problem with wired network is loose cable connections. Because you have to lay lots of cables and put them through walls etc. A bundle of tangled wires can result in damage and performance degradation. Using Zip-Ties is an excellent way to keep cables out of the way and tangle-free.

For the most part, wireless technology is reliable. There are some concerns about interference from home appliances such as microwaves and cordless phones, but most wireless routers provide multiple channels that can mitigate this concern relatively easily.

Security

The security of a home-based Ethernet network is almost primarily dependent upon a firewall. Most broadband routers include a firewall already and software firewalls can also be installed on individual machines. Unlike wireless networks that broadcast data through the air, all data packets in a wired network safely travel through Ethernet cables. As long as the router is protected from intrusion using a firewall, your wired home network is safe.

The mobility of wireless networks is overshadowed in some respects by the lower security inherent to wireless. An unsecured wireless network can easily be compromised by a hacker or identity thief looking to intercept private information traveling through your wireless network. Although these risks are very real, many of them can be avoided with proper network installation. For example, using a secure password for logging into the wireless network. Although this does not make a wireless router completely safe, it certainly reduces the likelihood of unwanted guests gaining access to your information.

Summary of The Advantages and Disadvantages

Activity/Category Wireless Network Wired Network
Freedom of movement for users Users can access network from anywhere within range Users location limited by need to use cable and/or connect to a port
Sharing Files Easier with wireless network as you do not need to be cabled to network, though transfer speeds may be slower Generally less convenient as you have to be cabled in, but transfer speeds often faster
Cables Far less complicated, disruptive, and untidy cabling needed Lots of cables and ports needed which can be a headache
Business For businesses dealing with public, customers like and often expect wireless, so wireless can increase income Wired networks are not convenient for public use, but sometimes acceptable for a traditional office
Connection speeds Usually slower than wired Usually faster than wireless
Security Less secure than wired. Both bandwidth and information can sometimes be accessed More secure than wireless
Set up Upgrading to a wireless network can be difficult and expensive Can also be difficult and expensive to set up

Conclusion

Here, we do not mean to abandon one over the other. A good home network will often have both wireless and wired components. Ethernet connections are great for high-speed transfers on desktops or other devices that do not move. Your smart phone, tablet, or laptop will benefit from a wireless network that has been properly configured to ensure a secure browsing experience. Whether you choose a wired or wireless network, or a combination of the two, take time to configure it properly and add a firewall to protect your privacy and the integrity of your network while enjoying the benefits afforded by both technologies. If you need any Ethernet cables for wired network, or cost-effective Ethernet switches for wireless network, just give FS.COM a shot. For more information, please visit www.fs.com.

Cisco 2960X Series Switches vs. Huawei S5700 Series Switches

As we all know, Cisco System is one of the biggest multinational technology conglomerate in the world for decades. Its network devices, such as routers, switches..are popular in their customers. We can believe that Cisco will develop stronger, but new and strong competitors are arising, like Huawei. Huawei is one of the largest telecommunications equipment manufacturer in the world, having overtaken Ericsson in 2012. Both are the giants of switch manufactures. Both switches offer more than enough bandwidth to be capable of forwarding at line rate for all ports. Both switches are designed to use the minimum amount of power possible at all times, earning them Green designations. But which one should I choose? Read on to know more about these switches.

cisco vs huawei

Cisco Switches vs. Huawei Switches

Before we cut to the chase, let’s take a look at the comparison between Cisco switches and Huawei switches. Although the function of switch is the same, different brands have different features.

Switches Series

Now, Cisco switches have many series. The popular series, enterprise switches, are Catalyst series and Nexus switches. Cisco Catalyst series includes 2960 series, 3650 series, 3850 series, 4500E series, etc. Cisco Nexus series includes 9000, 7000, etc. Huawei switches also have various series. There are data center switches, campus switches and SOHO & SMB switches. The popular one is the campus switches. In all the campus switches, the S5700 series is the hottest switches in enterprises.

Product Code Rules

Except the different series, there are also differences of their switches product code rules. Take Cisco WS-C3850-24T-L and Huawei S5700-28X-LI-AC switches as an example.

Cisco WS-C3850-24T-L Code Introduction:

  • WS=Switch, C=catalyst, 3850=3850 series
  • 24=Ethernet Port Number
  • T=Ethernet Ports
  • L=LAN Base image

Huawei S5700-28X-LI-AC Code Introduction:

  • S=switch
  • 57=5700 Series
  • 00=5700 Sub Series like 5710 series
  • 28=the biggest number of data interfaces is 48, including uplinks and downlinks
  • Li=Lite software Image
  • AC=Ac power supply
Cisco 2960X Series Switches vs. Huawei S5700 Series Enterprise Switches

Here is a one-to-one mapping between cisco 2960x and huawei s5700 switches, covering the relationship of them and help you choose the best network switch for your need.

About Cisco Catalyst 2960-X Series Switches

Cisco Catalyst 2960-X Series are stackable Gigabit Ethernet Layer 2 and Layer 3 access switches that provide enterprise-class access for campus and branch applications. Designed for operational simplicity to lower total cost of ownership, they enable scalable, secure and energy-efficient business operations with intelligent services and a range of advanced Cisco IOS Software features.

Cisco Catalyst 2960-X Series Switches feature:

  • 4 or 48 Gigabit Ethernet ports with line-rate forwarding performance
  • Gigabit Small Form-Factor Pluggable (SFP) or 10G SFP+ uplinks
  • FlexStack-Extended capabilities for out-of-the wiring-closet distance stacking of up to 8 switches with 40 Gbps of stack throughput (optional)
  • FlexStack-Plus for stacking of up to 8 switches with 80 Gbps of stack throughput (optional)
  • Power over Ethernet Plus (PoE+) support with up to 740W of PoE budget
  • 4-port PoE fanless switch for deployment outside the wiring closet
  • Reduced power consumption and advanced energy management features
  • USB and Ethernet management interfaces for simplified operations
  • Application visibility and capacity planning with integrated Full (Flexible) NetFlow and NetFlow-Lite
  • AN Base or LAN Lite Cisco IOS software features
  • Enhanced Limited Lifetime Warranty (E-LLW) offering next-business-day hardware replacement
  • Identify, classify and control of trusted internal network traffic through Domain Name System as an Authoritative Source (DNS-AS)

Cisco Catalyst 2960-XR Series Switches also offer:

  • Power resiliency with optional dual field-replaceable power supplies
  • P Lite Cisco IOS software with dynamic routing and Layer 3 features
About Huawei S5700 Series Gigabit Enterprise Switches

The S5700 series gigabit enterprise switches are next-generation energy-saving switches developed by Huawei to meet the demand for high-bandwidth access and Ethernet multi-service aggregation. S5700 provides a large switching capacity and high-density GE ports to accommodate 10 Gbit/s upstream transmissions. The S5700 can be used in various enterprise network scenarios. For example, it can function as an access or aggregation switch on a campus network, a gigabit access switch in an Internet data center (IDC), or a desktop switch to provide 1000 Mbit/s access for terminals.

  • Dual power slot
  • Intelligent stacking(iStack), supporting a maximum of 9 switches in a stack
  • Hardware BFD, hardware Ethernet OAM
  • Netstream
  • Energy-Efficient Ethernet(EEE)
Comparison Chart of Cisco 2960-X and Huawei S5700

Comparison Chart of Cisco 2960-X and Huawei S5700

FS.COM White Box switches and Compatible Transceiver Modules

FS 40G/100G white box switches provide high performance, increased availability, low latency and better serviceability for next-generation data centers and enterprise networks in different applications. And they also support spine-leaf network topology that leverage commoditized hardware for the best price/performance, just as shown below.

100g-switches

Summary

Cisco Vs Huawei, we can’t say which one is better than the other. Cisco switches meet the needs of organizations and offices of all sizes and sorts. As for Huawei, it has several product lines that are similar to Cisco devices, but have their own network hardware lines and IT solutions for different network demands. It all depends on what you need and of course your budget. Also as a global high performance data center solutions provider, FS.COM provides various networking devices for your reference like optical transceivers, which are compliant with major brand, patch cables for customized service and also Ethernet switches.

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.

Why Should Choose Managed Switch Over Unmanged Switch?

Before we talk about managed and unmanaged switch, we should first and foremost figure out what a switch is. Switches are boxes that connect a number of other devices together on a Local Area Network (LAN) and utilize what is called packet switching to effectively forward data to and from connections. Generally, There are two types of switch—managed and unmanaged switch. Here we will discuss the differences between the two types and why managed switch is recommended.

What Is the Difference Between Manged Switch and Unmanaged Switch?

An unmanaged switch on the other hand behaves like a “plug and play” device. It cannot be configured and simply allows the devices to communicate with one another. They tend to be less expensive than managed switches, as they have lower capacity and less flexibility. Generally, they don’t see much use outside of smaller and less intensive networking environments. Managed switches are fully configurable, and can be monitored and adjusted at your discretion. Although the management method and degree of configuration varies, they are typically more expensive than unmanaged switches, but offer much greater flexibility.

difference between managed switch and unmanaged switch

Why Should Choose Managed Switch Over Unmanged Switch?

There are several reasons why a managed switch is recommended.

48 Ports Managed Business Gigabit PoE+ Switch

Remote Access/Control

Managed switches give you better control over your LAN traffic and offer advanced features to control the traffic. Managed switches have all the features of an unmanaged switch and additionally have the ability to configure, manage, and monitor your LAN. So this helps you to monitor and decide who should have access to your network and gives you greater control over data flow through your network.

Security

With a managed switch you can secure your network connections and also protect any unused ports on your switch. For example, if there is an unused port on your managed switch, you can disable that port or even apply MAC address filtering so as not to allow unauthorised users or devices to access the network by just plugging in. Managed switches also require additional authentication through password protection of the network.

Redundancy

Redundancy means to provide an alternate data path to network traffic to safeguard a network in case a connection or cable fails. Managed switches incorporate Spanning Tree Protocol or STP to provide path redundancy in the network. This provides redundant paths but prevents loops that are created by multiple active paths between switches. STP allows one active path at a time between two network devices, prevents loops, and establishes redundant links as backups so that there is lesser downtime. This makes job for a network administrator easier and also proves more profitable for a business.

Quality of Service (QoS)

The Quality of Service (QoS) feature of a managed switch also allows you to prioritize your network traffic by assigning a higher priority to the critical traffic. This helps to improve network performance and helps in better transmission of delay-sensitive data such as real-time voice. So by assigning highest priority to voice data you can ensure the voice packets don’t get dropped or delayed and mangled during transmission and you can hear crystal clear voice during a conversation.

Port Mirroring

Port mirroring is a feature used on managed switches which helps to diagnose network problems. A Managed Switch allows you to configure Port Mirroring to send copies of traffic to a single port on the same switch for analysis by a network analyser. The network analyser then allows you to diagnose and fix problems without taking the network out of service, reducing downtime.

Conclusion

A managed switch is more intelligent and offers more control, flexibility, and features, some you may not even know you need. So if you are still undecided between an unmanaged and a managed switch, then please do not hesitate in getting in touch with FS.COM. We will be more than happy to help with your networking needs.

Layer 3 Switch VS. Router: Which to Choose?

Speaking of layer 3 switch and router, everyone may be confused about the two terms, because they both take IP packets, examine the destination address and pass the packet according to routing rules. It seems that layer 3 switch is identical to a router in this way. Actually, they do have some difference not only in function, but also other aspects. This article will explain how they differ from each other and a better option will be suggested for your reference.

Basics About Layer 3 Switch and Router

In general, a Layer 3 switch (routing switch) is primarily a switch (a Layer-2 device) that has been enhanced or taught some routing (Layer 3) capabilities and it was conceived as a technology to improve on the performance of routers used in large local area networks (LANs) like corporate intranets.

A router is a Layer-3 device that simply does routing only. In the case of a switching router, it is primarily a router that may use switching technology (high-speed ASICs) for speed and performance (as well as also supporting Layer-2 bridging functions).

Comparison Between Layer 3 Switch and Router

Layer 3 Switch VS. Router

Performance versus cost—Layer 3 switches are much more cost effective than routers for delivering high-speed interVLAN routing. High performance routers are typically much more expensive than Layer 3 switches.

Port density—Layer 3 switches, have more higher port count. Routers on the other hand typically have a much lower port density.

Flexibility—Layer 3 switches allow you to mix and match Layer 2 and Layer 3 switching, which means that you can configure a Layer 3 switch to operate as a normal Layer 2 switch, or enable Layer 3 switching as required.

WAN technologies support—Layer 3 Switch is limited to usage over LAN environment where Inter VLAN routing can be performed. However, when it comes to working on WAN and edge technologies, Layer 3 Switch lags behind. Router is the front runner in such scenario where WAN technologies such as Frame Relay or ATM need to be fostered.

Hardware/Software decision making—The key difference between Layer 3 switches and routers lies in the hardware technology used to build the unit. The hardware inside a Layer 3 switch merges that of traditional switches and routers, replacing some of a router’s software logic with hardware to offer better performance in some situations.

Layer 3 Switch & Router: When and Where to Use

Now let’s look into the scenarios when should Layer 3 switch or router be used.

When A Layer 3 Switch is needed?

1. If you need to connect your Hub rooms and make a L3 decision and more Ethernet interfaces are required for direct server form connectivity, then you can use a switch.

2. If you need to connect your inter-offices via l2 circuits by the ISP you can directly terminate the link on the switch and configure routing on the same.

3. If you need more through-put and direct access and interVLAN communication, switch is the best option.

When A Router is Needed?

1. If you are connecting an ISP directly to provide internet, then router is the box you need to deploy.

2. If you need to build tunnels between your offices (connecting 2 offices over public internet securely ), then you need a router.

3. If you are a CE participating in MPLS configuration, then you need a router.

Conclusion

Having explained the mechanism of both a router and a Layer 3 switch, I guess you’ve already have an understanding of them. Simply put, they perform the same function but each have pro’s and con’s as to limitations. Generally, Layer 3 switches are primarily used in the LAN environment, where you need routing. Routers are used in the WAN environment. These days lots of people have started using layer 3 switches in WAN environment, like MPLS. If you are looking for switches or any fiber optic cables and optical transceivers for switches, take FS.COM as a consideration. Or if you have any question about your network deployment, feel free to contact tech@fs.com for help.

What Kind of Switches and Patch Cables Should I Choose for SFP Transceiver?

Gigabit Ethernet has supplanted Fast Ethernet in wired local networks and becomes ubiquitous throughout the world, serving as one of the most prevalent enterprise communication standard. The Gigabit Ethernet standard supports a maximum data rate of 1 gigabit per second (Gbps)(1000 Mbps), 10 times faster than Fast Ethernet, yet is compatible with existing Ethernet. To link your switches and routers to a Gigabit Ethernet network, you need a Gigabit Ethernet transceiver as a transmission medium. This article intends to introduce the most commonly used one—SFP transceivers.

sfp

What Is SFP Transceiver?

SFP, short for small form-factor pluggable is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. SFP transceiver can be regarded as the upgrade version of GBIC module. Unlike GBIC with SC fiber optic interface, SFP module is with LC interface and the main body size of SFP is only about half of GBIC so that it can save more space. SFP interfaces a network device mother board (for a router, switch, media converter or similar devices) to a fiber optic or copper networking cable. It is designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.

Types & Applications of SFP transceivers

SFP transceivers are available with various transmitter and receiver types, which facilitates users to select the appropriate optical transceiver for different optical reach and optical fiber type (single-mode fiber or multimode fiber) required by different link. SFP transceiver modules can be divided into several different categories:

Types Transmission Medium Wavelength Distance
1000BASE-T SFP Twisted-pair cabling / 100 m
1000BASE-SX SFP Multimode fiber 770-860 nm OM1-275 m/OM2-550 m
1000BASE-LX/LH SFP SMF & MMF 1270-1355 nm MMF-550 m/SMF-5 km
1000BASE-ZX SFP Single mode fiber 1550 nm 70 km
1000BASE-EX SFP Single mode fiber 1310 nm 40 km
1000BASE-BX10 SFP Single mode fiber 1480-1500 nm downstream, 1260-1,360 nm upstream 10 km
CWDM and DWDM SFP Single optical fiber various wavelengths various maximum distances

SFP transceivers are found in Ethernet switches, routers, firewalls and network interface cards. Storage interface cards, also called HBAs or Fibre Channel storage switches, also make use of these modules. Because of their low cost, low profile, and ability to provide a connection to different types of optical fiber, SFP transceiver provides such equipment with enhanced flexibility.

FS.COM Compatible SFP Transceivers for Popular Switches

FS.COM offers a full range of SFP transceivers compatible with major brands, such as Cisco, Juniper, Arista, Brocade, HPE, etc. All of these cost-effective compatible SFPs have been strictly tested to make sure 100% compatibility. The table below listed a small part of compatible SFPs supported on major branded switches.

Brand Switch Series Model Port Description
Cisco Catalyst 6500 Series WS-SUP720-3BXL 2 SFP Port
VS-S720-10G-3C 4 SFP Port
WS-X6724-SFP 24 SFP Port
Nexus 9000 Series N9K-C9396PX 48 SFP Port
IE3010 Series IE-3010-24TC 2 SFP Port
ASR 9000 Series Router A9K-MPA-20X1GE 20 SFP Port
Juniper EX 4200 Series EX4200-24T 2 SFP Port
EX4200-48T 4 SFP Port
EX4200-24T-DC 2 SFP Port
MX480 Router MX480 Router 4 SFP Port
SRX Series SRX210 1 SFP Port (Option)
QFX 5100 QFX5100-48S 48 SFP Port
Arista 7500 Series DCS-7504 48 SFP Port (Option)
DCS-7508 48 SFP Port (Option)
7050SX Series 7050SX-64 48 SFP Port
7100 Series DCS-7124S 24 SFP Port
Brocade VDX 6720 BR-VDX6720-16-R 16 SFP Port
BR-VDX6720-24-F 24 SFP Port
BR-VDX6720-40-F 40 SFP Port
SX Series SX-424F 24 SFP Port
SX-FI12GM-4-PREM 12 SFP Port
Brocade BI-RX-8 NI-MLX-1Gx20-SFP 20 SFP Port
HPE ProCurve 5400zl Series J8697A 2 SFP Port
J9548A 144 SFP Port
FlexFabric 5800 Series JC101B 4 SFP Port
JG225B 6 SFP Port
5400R zl2 Series J9584A 24 SFP Port
StorageWorks edge 2/12 348406-B21 12 SFP Port

FS.COM Patch Cables for SFP Transceivers

FS.COM offers comprehensive fiber patch cables for common and special types of SFPs, including singlemode & multimode, simplex & duplex, UPC & APC, lengths from 1 meter to 30 meters in large stocks. We also provides Cat 5e patch cables for 10/100/1000BASE-T SFPs.

Fiber Mode Connector Jacket
9/125 SMF LC Duplex PVC/LSZH/OFNP
9/125 SMF LC Simplex PVC/LSZH
9/125 SMF SC Simplex PVC/LSZH
50/125 OM2 LC Duplex PVC/LSZH
62.5/125 OM1 LC Duplex PVC
Cat5e Patch Cables Max Distance Data Rate
Unshielded (UTP) 100m 1000Mbps
Shielded (FTP) 100m 1000Mbps

Summary

This article offers switch and fiber patch cabling solution for SFP transceivers. Besides the major brands mentioned above, we also provide SFP transceivers compatible with other brands, such as Dell, Extreme, H3C, Huawei, Intel, IBM, Netgear, Ciena, D-Link, Avago, and so on. As to special requirements, please contact Sales@fs.com for suggestion.

25GbE–A New Trend For Future Ethernet Network

Nowadays, the requirement for bandwidth in cloud data centers is increasing strikingly. To meet the demand for higher bandwidth, networking and the Ethernet industry are moving toward a new direction. Discussions previously focusing on 10GbE and 40GbE are now shifting onto 25GbE. It seems that 25GbE is more preferred and accepted by end users, which poses a threat to 10GbE and 40GbE. Why does it happen? This post will lead you to interpret 25GbE in an all-sided perspective.

25GbE–A New Trend for Future Ethernet Network

25GbE—An Emerging Standard

25GbE is a standard developed by IEEE 802.3 Task Force P802.3by in July 2014, used for Ethernet servers and switches connectivity in a data center environment. The single lane design of 25GbE gives it a low cost per bit, which enables cloud providers and large-scale data center operators to deploy fewer switches and cables to meet the needs while still scaling their network infrastructure. The following table provides a summary of key upcoming IEEE standard interfaces that specify 25GbE.

25GbE–A New Trend for Future Ethernet Network

Figure 1: IEEE 802.3 standard Interfaces that specify 25GbE

Cloud Will Drive to QSFP28 and SFP28

The 25GbE physical interface specification supports two main form factors—SFP28 and QSFP28.
SFP28 is used for a single 25GbE port. The SFP28-25G-SR-S is an 850nm VCSEL 25GbE transceiver which is designed to transmit and receive optical data over 50/125µm multimode fiber (MMF) and support up to 70m on OM3 MMF and 100m on OM4 MMF.

The QSFP28 transceiver and interconnect cable is a high-density, high-speed product solution designed for applications in the telecommunication. The interconnect offers four channels of high-speed signals with data rates ranging from 25 Gbps up to potentially 40 Gbps, and will meet 100 Gbps Ethernet (4×25 Gbps) and 100 Gbps 4X InfiniBand EDR requirements.

100GBASE-SR4-with-four-25GBASE-SR-SFP28

Figure 2: FS.COM optical transceivers for 25GbE solution

Why Choose 25GbE

While 10GbE is fine for many existing deployments, it cannot efficiently deliver the bandwidth required by next-generation cloud and web-scale environments. And 40GbE isn’t cost-effective or power-efficient in ToR switching for cloud providers. Thus, 25GbE was designed to break through the dilemma.

Number of SerDes Lanes

SerDes is an integrated circuit or transceiver used in high-speed communications for converting serial data to parallel interfaces and vice versa. The transmitter section is a serial-to-parallel converter, and the receiver section is opposite. Currently, the rate of SerDes is 25 Gbps. That is to say, we can only use one SerDes lane at the speed of 25 Gbps to connect from 25GbE card to the other end of 25GbE card. In contrast, 40GbE needs four 10GbE SerDes lanes to achieve connection. As a result, the communication between two 40GbE cards requires as many as four pairs of fiber. Furthermore, 25 Gbps Ethernet provides an easy upgrade path to 50GbE and 100GbE networks, which utilize multiple 25GbE lanes.

Numbers of lanes needed in different Gigabit Ethernet

Figure 3: Numbers of lanes needed in different Gigabit Ethernet

Utilization of PCIe Lanes

At present, the mainstream Intel Xeon CPU only provides 40 lanes of PCIe 3.0. The lane bandwidth of a single PCIe 3.0 is about 8 Gbps. These PCle lanes are used for many connections. Therefore, it is necessary to consider the utilization of limited PCIe lanes by the network cards. Single 40GbE NIC needs at least one PCIe 3.0 x8 slot, so two 40GbE cards need to occupy two PCIe 3.0 x8 lanes. Even if the two 40GbE ports can run full of data at the same time, the actual lane bandwidth utilization is only: (40G+40G) / 8G*16= 62.5%. On the contrary, 25GbE card only needs one PCIe 3.0 x8 lane, and then the utilization efficiency is 25G*2 / (8G*8) = 78%. Apparently, 25GbE is significantly more efficient and more flexible than 40GbE in terms of the use of PCIe lanes.

10GbE vs 25GbE vs 40GbE

25GbE enables resellers and their customers to provide 2.5X the performance of 10GbE, making it a cost-effective upgrade to the 10GbE infrastructure. Since 25GbE is delivered across a single lane, it provides greater switch port density and network scalability compared to 40GbE, which is actually four 10GbE lanes. Thus, it costs less, requires lower power consumption and provides higher bandwidth. What’s more, 25GbE can run over existing fiber optic cable plant designed for 10, 50 or 100GbE and also 40GbE by changing the transceivers.

Bandwidth comparison for 25GbE and other Ethernet speeds

Figure 4: Bandwidth comparison for 25GbE and other Ethernet speeds

Summary

No matter the market research or the attitude of users, 25GbE seems to be the preferred option down the road. Actually, coming back to reality, there will be a significant increase in 100GbE and 25GbE port density in the next few years. If you need any optics and cabling solution for your 25GbE infrastructure, feel free to contact sales@fs.com.

Five Basics About Fiber Optic Cable

A fiber optic cable is a network cable that contains strands of glass fibers inside an insulated casing. They’re designed for high performance data networking and telecommunications. Fiber optic cable carry communication signals using pulses of light, faster than copper cabling which uses electricity. They are becoming the most significant communication media in data center. Then how much do you know about them? This post serves as a guide for beginners.

Fiber Components

The three basic elements of a fiber optic cable are the core, cladding and coating. Core is the light transmission area of the fiber, either glass or plastic. The larger the core, the more light that will be transmitted into the fiber. The function of the cladding is to provide a lower refractive index at the core interface, causing reflection within the core. Therefore the light waves can be transmitted through the fiber. Coatings are usually multi-layers of plastics applied to preserve fiber strength, absorb shock and provide extra fiber protection.

Fiber Components

Fiber Type

Generally, there are two basic types of fiber optic cables: single mode fiber (SMF) and multimode fiber (MMF). Furthermore, multimode fiber cores may be either step index or graded index.

Single mode and multi-mode fiber-optic cables

Single mode optical fiber is a single strand of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission. The index of refraction between the core and the cladding changes less than it does for multimode fibers. Light thus travels parallel to the axis, creating little pulse dispersion. It’s often used for long-distance signal transmission.

Step index multimode fiber has a large core, up to 100 microns in diameter. As a result, some of the light rays that make up the digital pulse may travel a direct route, whereas others zigzag as they bounce off the cladding. These alternative pathways cause the different groupings of light rays to arrive separately at a receiving point. Consequently, this type of fiber is best suited for transmission over short distances.

Graded index fibers are commercially available with core diameters of 50, 62.5 and 100 microns. It contains a core in which the refractive index diminishes gradually from the center axis out toward the cladding. The higher refractive index at the center makes the light rays moving down the axis advance more slowly than those near the cladding.

Fiber Size

Single mode fibers usually has a 9 micron core and a 125 micron cladding (9/125µm). Multimode fibers originally came in several sizes, optimized for various networks and sources, but the data industry standardized on 62.5 core fiber in the mid-80s (62.5/125 fiber has a 62.5 micron core and a 125 micron cladding. It’s now called OM1). Recently, as gigabit and 10 gigabit networks have become widely used, an old fiber design has been upgraded. 50/125 fiber was used from the late 70s with lasers for telecom applications. 50/125 fiber (OM2) offers higher bandwidth with the laser sources used in the gigabit LANs and can allow gigabit links to go longer distances. Laser-optimized 50/125 fiber (OM3 or OM4) today is considered by most to be the best choice for multimode applications.

Basic Cable Design

The two basic cable designs are loose-tube cable, used in the majority of outside plant installations, and tight-buffered cable, primarily used inside buildings.

loose-tube-or-tight-buffered-cable

The modular design of loose-tube cables typically holds up to 12 fibers per buffer tube with a maximum per cable fiber count of more than 200 fibers. Loose-tube cables can be all dielectric or optionally armored. The modular buffer-tube design permits easy drop-off of groups of fibers at intermediate points, without interfering with other protected buffer tubes being routed to other locations.

Tight-buffered cables can be divided into single fiber tight-buffered cables and multi-fiber tight-buffered cables. single fiber tight-buffered cables are used as pigtails, patch cords and jumpers to terminate loose-tube cables directly into opto-electronic transmitters, receivers and other active and passive components. While multi-fiber tight-buffered cables also are available and are used primarily for alternative routing and handling flexibility and ease within buildings.

Connector Type

While there are many different types of fiber connectors, they share similar design characteristics. Simplex vs. duplex: Simplex means 1 connector per end while duplex means 2 connectors per end. The following picture shows various connector styles as well as characteristics.

fiber cable connectors

Summary

Ultimately, what we’ve discussed is only the tip of the iceberg. If you are eager to know more about the fiber optic cable, either basics, applications or purchasing, please visit www.fs.com for more information.

FS UPS–Save Your Power

Imagine that you are working overnight for a project planning on your computer, and all of a sudden, you see a blank screen due to power cut. And what’s worse, all of your documents, important data and information are lost, and all of your efforts are in vain. It does sound like a devastating tragedy, right? However, with FS UPS power supply, you won’t worry about the issue of lost information. You can still move on with your work even if there is a power blackout. Why it’s so magic? Let’s check it out.

Power System On-Line Single-Phase 1kVA 800W Double-Conversion UPS

Three Operational Modes of UPS System

An uninterruptible power supply, also known as uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. A modern UPS system has three general categories: on-line, line-interactive and standby/offline.

A standby/offline UPS charges its battery and then waits for the mains power to drop off. When that happens, the Standby UPS mechanically switches to the battery backup. This switch over takes about 20-100 milliseconds, which is generally well within the tolerance threshold of most electronics.

A line-interactive UPS has a similar design to a standby UPS, but includes a special transformer. This special transformer makes line-interactive UPS better at handling brownouts and power sags without consuming the limited reserve battery power.

An online UPS completely isolates the devices attached to it from the wall power. Instead of jumping into action at the first sign of power cut or voltage regulation issues like the standby and line-interactive UPS, the online UPS continuously filters the wall power through the battery system.

When A UPS is Needed

UPS power supply can not only solve the problem of power outages, but also the following power quality problems.

1.Power surge—The effective value of the output voltage is 110% higher than the rated value and such condition lasts for one or more cycles.

2.High voltage spike—A voltage with a peak value of 6000V and duration from 1/10000 second to 1/2 cycles (10ms).

3.Switching transient—An impulse voltage whose peak voltage reaches up to 20000V, but duration sustains within millionth of a second to one in ten thousand second.

4. Power sags—It refers to a low voltage state whose mains voltage is between 80% and 85% of the rated value, and lasts for one to several cycles.

5. Electrical line noise—It refers to Radio Frequency Interference (RFI), Electromagnetic Interference (EFI) and other kinds of high frequency interference.

6. Frequency variation—The change of mains voltage frequency exceeds more than 3Hz.

7. Brownout—The effective value of the mains voltage is continuously below the rated value for a long time.

8. Power fail—The interruption of the power supply and lasts for at least two cycles to several hours.

What Kind of UPS Can FS Offer

FS mainly deals with online UPS, including one-phrase and three-phrase type. FS online UPS always provides power from the battery, so the load always gets clean power regardless of any power problems. Therefore, FS online UPS is recommended for sensitive and critical electronic devices. The online UPSs offered by FS act as advanced power managers, ensuring the availability of an uninterrupted power supply to protect hardware (such as computers, data centers, telecommunication equipment or other electrical equipment) and mission critical applications. As is shown in the picture below, FS online UPS can be divided into eight parts and each of them has its unique function.

FS online UPS

Summary

High-quality UPS plays an important role in safeguarding against many potential energy issues. If you are investigating the best system for your own requirements, speak to one of our technical specialists who will be able to provide free advice on the most appropriate solution. Feel free to contact us via tech@fs.com.

Cisco Catalyst 9000 Series Switches: What’s New?

Recently, 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. These switches form the foundational building block for Cisco Software Defined Access (SD-Access). And what’s more, they also support full IEEE 802.3at Power over Ethernet Plus (PoE+), and Universal Power over Ethernet (UPoE). These switches enhance productivity by enabling applications such as IP telephony, wireless, IoT, and video for a true borderless network experience. This post will take a closer look at Catalyst 9000 switches and some highlights of them.

Members of the Cisco Catalyst 9000 Family

The Cisco Catalyst 9000 Series switches come in three main varieties.

Members of the Cisco Catalyst 9000 Family

  • The Catalyst 9300 is top fixed-access enterprise network switch series, stacking to 480Gbps. The Cisco Catalyst 9300 switches feature a fixed number of switch ports (1G 48-port, 1G 24-port, or 24 ports of 1G/2.5G/5G/10G).
  • The Cisco Catalyst 9400 is the leading modular-access switches for enterprise, which can support up to 9Tbps. It features 7-slot and 10-slot variety.
  • The Catalyst 9500 is the industry’s first fixed-core 40Gbps switch for the enterprise. It comes in three different varieties, a 24 port 40G switch, a 12 port 40G switch, and a 40 port 10G switch with 10/40G uplinks. The Cisco Catalyst 9500 is meant for distribution and core use.
New Design

The Catalyst 9000 series have some special design choices, which make Catalyst 9000 the industry’s most aesthetic switches.

  • Rounded frame without sharp corners, changing the traditional switch outline.
  • Ergonomic pullout handles on the Catalyst 9400 enable better weight distribution. You don’t have to carry it on your back or worry about breaking your back when lifting these switches!
  • Innovative slide-out ejectors with latch on the uplink modules of Catalyst 9500. Screwdrivers can be abandoned!
  • Molded plastic covers ejectors, screws and handles on field replaceable units. Gloves are needless!
  • Industry standard icons now advertise the capabilities of the switch–a truly universal switch!
  • The Catalyst 9400 chassis introduces user-configurable dual serviceable fan-tray design, allowing users to service the same fan-tray from the front and rear of the chassis.
  • The Catalyst 9300 Series switches support a blue beacon LED for easy identification of the switch being accessed.

new design choices

New Software

The new Cisco Catalyst 9000 switches use an Intel x86 processor to help create a network that constantly learns and adapts. Above the feature, Cisco adopts a central software console called the Cisco Digital Network Architecture (DNA) Center that replaced the obsolescent and deprecated command-line interface (CLI). DNA is about bringing the power of automation, ease of management, and predictable performance to networks while driving down cost.

New Packaging

The Catalyst 9300 Series introduces new licensing packaging: Network Essentials and Network Advantage, which feature vastly simplified base network packages. Additionally, there are two licensing levels for Cisco DNA, namely Cisco DNA Essentials and Cisco DNA Advantage, which are hardware and term-based software packages used as mandatory add-ons. In addition to on-box capabilities, the Cisco DNA packages unlock additional functionality in Cisco DNA Center (in APIC-EM), enabling controller-based software-defined automation in your network. License consumption is further simplified with the package combinations of Essentials and Advantage.

Transceiver Options for The Catalyst 9000

The following diagram lists the supporting detailed transceiver options for Catalyst 9300 Series. Take C9300-NM-4G as an example, this module has four 1G SFP module slots. Any combination of standard SFP modules are supported.

Model ID Description
11773 Cisco GLC-T Compatible 1000BASE-T SFP Copper RJ-45 100m Transceiver
34976 Cisco GLC-TA Compatible 10/100/1000BASE-T SFP Copper RJ-45 100m Transceiver
12622 Cisco SFP-GE-L Compatible 1000BASE-LX/LH SFP 1310nm 10km DOM Transceiver
48928 Cisco SFP-GE-S-2 Compatible 1000BASE-SX SFP 1310nm 2km DOM Transceiver
39297 Cisco GLC-TE Compatible 1000BASE-T SFP Copper RJ-45 100m Transceiver
15413 Cisco Linksys MGBT1 Compatible 1000BASE-T SFP Copper RJ-45 100m Transceiver
12624 Cisco SFP-GE-Z Compatible 1000BASE-ZX SFP 1550nm 80km DOM Transceiver
39370 Cisco Meraki MA-SFP-1GB-SX Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver
28299 Cisco ONS-SE-ZE-EL Compatible 10/100/1000BASE-T SFP Copper RJ-45 100m Transceiver


Summary

The Catalyst 9000 Family solves some persistent challenges of enterprise networks by utilizing platform innovations built around four key areas: security, Internet of Things (IoT) convergence, mobility and cloud readiness. There is no doubt that Catalyst 9000 is leading us to a new era of faster and securer network. And if you need any transceiver or cables for mating Cisco Catalyst 9000 series, please contact us via sales@fs.com. All the products offered by FS.COM are tested before shipping to ensure superior quality.