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Multipath implements LUN device name persistence. I. additional knowledge based on different transmission protocols, the network card can be divided into three types: An Ethernet card, an FC network card, and an iSCSI Network card. (1) Ethernet adapter: The learning name EthernetAdapter. the transmission protocol is the IP protocol. Generally, the persistence of the LUN device name is realized through optical fiber cables or dual Multipath. according to different transmission protocols, network

Quidway S1700 series enterprise network switches Product OverviewQuidway®S1700 series enterprise network switches (hereinafter referred to as S1700) are the next-generation green and energy-saving Ethernet access switches launched by Huawei. For various applications of enterprise customers, S1700 provides simple and convenient installation and maintenance methods and rich business features to help users build secure, reliable, and high-performance networks. S1700 can be widely used in small busi

optical module Mainly includes Optical electronic devices, functional circuits and optical interfaces, etc., is an important device in optical communication Now let fast fiber optics (feisu.com) I. Look at the demandIt's good to see. whether the requirements are met , such as clothes have many styles, light modules also have many kinds of, mainly divided into: GBIC, SFP, SFP +, XFP, SFF, CF

MPO/MTP high-density optical fiber pre-connection system is mainly used in three fields: application of high-density environment in data centers, application of optical fiber to building, application of optical fiber to optical splitter, 40G, 100g sfp, connection applications of SFP + and other optical transceiver devices. This article focuses on why MPO/MTP high-density optical fiber pre-connection system

interface. What can I do? Because a Cisco TFTP Server upgrade requires that the Cisco switch fail to be connected to a PC with a TFTP Server installed on the network. After some look, finally found that the super engine 720 above a RJ-45 look like the interface, next to the words Link, play! The result is a try with the network cable, and the indicator light is not on. I thought that I had a hope and fell into the bottom, but I cannot give up. This interface is the only hope. Otherwise, I woul

, play! The result is a try with the network cable, and the indicator light is not on. I thought that I had a hope and fell into the bottom, but I cannot give up. This interface is the only hope. Otherwise, I would be discouraged from using xmodem to transmit 41 MB of IOS. Because I used xmodem to transmit a cisco Switch Failure IOS, it would take more than two megabytes. It took two hours. 41 MB? It can take up to 30 hours! So I started surfing the Internet to find information ......, Finally f

Object: String-to-value ing; self-contained attributes; inherited attributesString, number, and Boolean value: they are not objects. When their attributes are referenced, JS will call new XXX () to convert them into objects. When the reference ends, the temporary object (wrapped object) will disappear. Attribute assignment is ignored. You can also display the packaging object. Typeof: object. No practical significanceOperate on objects through referenceVaR x = {Name: '

"); PageUserservice.findalluser (Domain.getdomainid (), name, page, pageSize); Simplefilterprovider SFP=NewSimplefilterprovider (); Sfp.addfilter ("Userfilter", Simplebeanpropertyfilter.serializeallexcept ("Rechargerecords")); String JSON=Jacksonutil.objtojson (list, SFP); WriteString (JSON, RES); }View Code@Override PublicPageLongDomainid, String name,intPageintpageSize) {String hql=NULL

Multipath implements LUN device name persistence. I. Additional knowledge based on different transmission protocols, the network card can be divided into three types: an Ethernet card, an FC network card, and an iSCSI network card. (1) Ethernet Adapter: an Ethernet Adapter. The transmission protocol is an IP protocol. It is generally connected to an Ethernet switch through an optical fiber cable or twisted pair. Interfaces can be divided into optical ports and electrical ports. Optical interface

Today there are user Cisco 3850 Insert multimode Gigabit module after error log as follows:*oct 13:48:54:%platform_pm-6-module_errdisable:the inserted SFP MODULE with interface name GI1/0/18 was not suppor Ted*OCT 13:48:54:%pm-4-err_disable:gbic-invalid error detected on GI1/0/18, putting GI1/0/18 in err-disable state*oct 13:48:56:%LINK-3-UPDOWN:INTERFACEGIGABITETHERNET1/0/18, changed state-to-downCisco official website to view the document after proc

Today in the Webmaster station to see a netizen to write the photo album program, the function is quite simple, see he used the aspjpeg to generate thumbnails, not to recall using aspupload upload, so spent one hours to perfect his code. The following code has a simple comment, if you do not understand, please look at AspJpeg and AspUpload documentation (E, hope to have psychological preparation), can not understand the ask me. Here's the code: Copy Code code as follows: If sessio

H3C S5500-28c-ei H3C: Manufacturer Brand s represents the switch, if the SR represents the business router The first 5 represents the gigabit switch, if 3 represents the gigabit uplink, the hundred trillion downlink. If 7 represents a high-end box switch. 9 represents the core box-type switch The second 5 represents a three-tier exchange or a two layer, greater than or equal to 5 is a routing switch, and less than 5 is a two-tier switch 00 is to distinguish the same category of multiple ser

.), or with other network devices (storage devices, servers, workstations, etc.) to connect , thus forming a network of hardware devices. So, the fiber-optic network card is the name in the end is the fiber port HBA card? In fact, the fiber-optic network card that you often refer to is the HBA card in the Fibre Channel networks. Because of the different transmission protocol, the network card can be divided into three kinds, one is Ethernet cards, the other is FC network card, the third is iS

of transmission products and provides interfaces such as Ethernet over SDH and CWDM. Therefore, R8000 can use a single device to implement the functions of multiple devices, maximizing the cost of network construction and maintenance for operators. R8000 adopts the network processor-based distributed forwarding architecture and has fully programmable capabilities. It can implement flexible service generation and customization functions and provide ne

service ports of the aggregation Layer Nodes and reduce network costs. At present and in the future, the TDM business will remain the most important source of revenue for telecom operators, and there is still room for growth. When the business needs are dominated by TDM business, create a convergence layer for the Metro Transmission Network to use MSTP. If the existing SDH network still has a large amount of remaining capacity, it can meet the needs of future TDM business development, and when

is also the main working band of the current practical optical fiber communication system. The main parameters of 1310nm conventional single-mode optical fiber are determined by the ITU ITU-T in G652 recommendations, so this kind of optical fiber is also called G652 optical fiber. As mentioned above, because of the absorption effect of OH peaks (Water peaks), 900 ~ 1300nm and 1340nm ~ There is a loss peak in the 1520nm range, which is called a water peak. Currently, the TeraSPEEDTM zero-water p

require long-distance, high-density, GB embedded optical connections. MSA uses coarse Wavelength Division Multiplexing (CWDM) technology to provide four 25G Single-Mode Optical Fiber (SMF) link channels. Similarly, the OpenOptics MSA organization launched by Ranovus and Mellanox Technologies will focus on developing a data center that supports 2 km and GB. In the past, the speed improvement promoted the development of most network components. Today,

interoperability. In short, where fiber resources are scarce, where can be used WDM transmission system, not only to solve the problem of resource shortages, but also can greatly solve the rental of optical fiber or laying optical cable more cost savings. Next, I will give you a few very typical WDM transmission system application scenarios. 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/6E/FE/wKiom1WOTjSBaqjwAAEu6ILl5JI543.jpg "title=" Point-to-point wavelength division multiplexin

features of the ATM network and is the most mature PON technology. GPON protocol:In ITU, the uplink/downlink rate is increased to 2.5 Gb/s through the GPON passive architecture standard, and is encapsulated using the general frame-based protocol (green code, in this way, value-added services such as voice, data, video, e-commerce, distance education, and telemedicine are more effectively supported on the GPON platform. The direction from the OLT To The ONU/ont is the downstream direction, and

three kinds of RPR, manufacturers have introduced the corresponding products. The independent 2-layer RPR implementation scheme is mainly applicable to the access layer and the aggregation layer of IP metropolitan Area Network, and is the most mature solution at present. Some manufacturers combine multiprotocol label Switching (MPLS) technology, clock synchronization technology, CWDM technology and TV video broadcasting technology with this 2-tier im