博文

目前显示的是 二月, 2016的博文

Introduction to Three 10G Cabling Standards

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The accelerating growth of worldwide network traffic is forcing service providers, enterprise network managers and architects to look to ever higher-speed network technologies, just as the cabling technologies that support them are changing continually. Both IEEE802.3 standards and the associated 10G cabling technologies have assumed many forms in order to determine what 10G cabling strategy best suits a particular organization. The 10GbE standards outlined below help define and optimize the environment in which they operate and the cabling technologies over which they communicate. After going through this passage, you may find a suitable cabling for your 10G network. IEEE802.3ae
Ratified in June 2002, the IEEE802.3ae LAN standard was developed to update the preexisting IEEE802.3 standard for 10GbE fiber transmission. With the new standard, seven new media types were defined for LAN, metropolitan area network (MAN) and wide area network (WAN) connectivity: 10GBASE-SR—uses the lowest cos…

What Does DOM Mean for a SFP Transceiver?

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If you take a look at the description of a SFP transceiver module, you will see the “DOM support” appeared in the product details. What does it mean? In fact, DOM or Digital Optical Monitoring as the words implies, is used for monitoring some parameters of the transceiver, which can help to identify the location of the fiber link failure, simplify maintenance, improve system reliability. Obviously a SFP with DOM function is high-ender than one without it. This is why most of modern optical SFP transceivers support DOM functions. To have a further understanding of DOM, some detailed information will be introduced in the following passage. What Is DOM Support?
As noted before, DOM is a feature allowing users to monitor parameters of the transceiver module in real-time, such as temperature, supply voltage, laser bias current as well as transmit and receive optical power. Measurement of these parameters can help network administrators to check and ensure that the module is functioning cor…

How Transceiver Help Support Big Data

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Optical transceiver market is growing rapidly and expected to be worth billion dollars. Network designers confirm that big data technology in data center is a major contributor to this growth. A transceiver, as a necessary component in data center can help executives to get their data in real-time, thus people can make immediate decisions. This is why it’s so important to be aware of how transceivers help to support big data. Transceivers Are Supporting Big Data in Data Centers
Big data technology nowadays is the overwhelming trend because people can have access to data at all times and at everywhere. Greater bandwidth is necessary to support video and other types of data. Recently, 40GbE network has replaced 10G Ethernet network and has been used worldwide. 40GbE network is typically comprising of a pair of transceivers connected with cable. The transceivers, in turn, are plugged into either network servers or a variety of components including interface cards and switches. Transceiver…

40GbE – A Logical Step for 100GbE

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2010 witnessed the ratification of 40GbE and 100GbE standard, which is a great breakthrough of telecommunication industry. This standard is developed by the IEEE 802.3ba Task Force to support sending Ethernet frames at 40 and 100 gigabits per second. They also address physical layer specifications for communication across backplanes, copper cabling, multimode fiber and single-mode fiber. In 2016, 40GbE will continue to enjoy its popularity of aggregation links in data center networks. With four times the capacity and the ability to cost-effectively migrate to 100GbE, 40GbE is regarded as the next logical step in the evolution of data network. 40GbE has been utilized worldwide, and 100GbE will become popular soon, we can’t help looking forward to the advent of higher-bandwidth network like 400GbE. A Closer Look at 40GbE
40GbE network, just like 1GbE or 10GbE network layer, is mainly comprising of a pair of transceivers connected by a cable. The transceivers, in turn, are plugged into ei…

Three Common Types of HP 40G Modules

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40G QSFP+ (quad small form-factor pluggable plus) module is a compact, hot-pluggable transceiver used for data communications applications. It is the high-density interface addressing deployment of high-performance computing in data center clouds by using four independent optical transmit and receive channels. Compatible HP QSFP+ transceivers provided by Fiberstore are third-party optical modules certificated to be fully compatible with HP Switch/Router product line. HP compatible QSFP+ transceivers have the same functionality with the original. HP 40GBASE QSFP+ modules in this article are mainly introduced in three different types—40G LR4 QSFP+ transceiver, 40G SR4 QSFP+ transceiver and 40G CSR4 QSFP+ transceiver. HP 40GBASE-LR4 QSFP+ Transceiver
The 40G LR4 QSFP+ transceiver together with the LC connector can support an optical link length up to 10 kilometers over single-mode fiber. 40G LR4 QSFP+ transceivers offer 4 independent transmit and receive channels. In order to realize the …

Shedding Light on the Ethernet

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Ethernet is the most widely used LAN technology up to now, connecting more than 85 percent of the world’s LAN-connected PCs and workstations. Ethernet refers to the family of computer networking technologies covered by the IEEE 802.3 standard, and can run over both optical fiber and twisted-pair cables. Over the past years, Ethernet has steadily evolved to provide additional performance and network intelligence. This continual improvement has made Ethernet an excellent solution for industrial applications. Understanding how Ethernet developed can provide a foundation that will improve your understanding of networking in general. Figure 1 shows how systems might be connected to an Ethernet network. Ethernet—A Brief History
The original Ethernet was developed as an experimental coaxial cable network in the 1970s by Xerox Corporation to operate with a data rate of 3 Mbps using a carrier sense multiple access collision detect protocol for LANs (CSMA/CD )with sporadic but occasionally heavy…

40 Gigabit Ethernet in the Enterprise

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With the ratification of the IEEE 802.3ab in 2010, 40GbE has displaced 10GbE as the next network speed evolution in the enterprise. As was the case with the migration to 10GbE, the two main factors to widespread deployment of 40GbE are deployment costs and supporting technologies and tools. In the 10G era, the network monitoring switch emerged as one of the technologies that helped enterprises clear the hurdles to High-Speed Ethernet deployment, which is also poised to play an even greater role in the 40GbE era. The following picture shows a migration path of Ethernet and relevant devices. Need for Speed in the Enterprise
The next network speed evolution in the enterprise is 40 gigabits per second. Until now, Ethernet speed has increased from 10Mbps to 100Mbps, to 1000Mbps and eventually to 10Gbps. However, this time around the 802.3 Higher Speed Study Group (HSSG) found that computing and network aggregation applications were growing at different rates and determined that two new rate…