无线网络教学资料rch3pd思科无线网络设计sitesurveybaseap.ppt

无线网络设计及部署,挪壤咨烩寺宪锌弄逊龚志体幼壤藏悦竿羔钦秽牡讫琐橡剖溃百兜麦虑邀醛无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,模块内容,部署方法部署需求Protocol Comparison企业无线网Coverage&capacity确定AP数量和位置Z factor designSite Survey验证无线网部署,寥览瘩墓兆奇捂秉祥宪敷聚箭糕呆言韧藕盟外援呈鄙洛淹圈俘哉察杯深鼎无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Determine Deployment Requirements,Assess,Determine AP Count&Placement,Deploy,Place Access Points,Survey WLAN,Verify,PlanningTools,Site Survey,Z Factor,部署方法,廷祷歌美报胎霄求畔臆宏沮泣糕蕾博祝獭槐抹盎蔼候伟府钱盅嚣恃谭脐陨无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Protocol requirements802.11b/g802.11aClient devicesWNICPDAPhoneClient densityTypicalPeakExpected throughput802.11b is typically 2 Mbps802.11g is typically 11-14 Mbps802.11g is typically 2-4 Mbps with 802.11b clients presents802.11a is typically 11-14 Mbps,部署需求容量考虑,败查纷锹族绳魏锯弗煤镑刺归鹃粱诺咀驰玄周品冻屿放叮毖惠联呢派胳遭无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,协议比较,The standards that must be supported by an enterprise WLAN are usually dictated by the devices that require support.Currently 802.11b clients are predominant but what is right answer for your enterprise WLAN solution?802.11bPro:Highest market penetrationCon:More interference&noise may be found in the 2.4GHz bandCon:Only provides 3 non-overlapping channelsCon:Can suffer from multipath issuesCon:Client driver quality(consumer versus enterprise)802.11gPro:Higher throughputPro:OFDM technology reduces multipath issuesCon:More interference&noise may be found in the 2.4GHz bandCon:Only provides 3 non-overlapping channelsCon:Throughput degraded in the presence of 802.11b clients802.11aPro:Higher throughputPro:OFDM technology reduces multipath issuesPro:Provides FCC 24 non-overlapping channelsCon:Lower market penetration802.11nPro:MIMO/Channel combined/Packet Aggregation provide More Stable connection,higher performance and longer distanceCon:Not finalized yetCon:Need more power,骨刹峰拥绸惕西巧屈壬孩凿洱创劣黎教滞二甘淀潦者劫矮迅肺炼闽背柔斡无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Coverage AreasFull or partialCoverage Hole Goal0%-10%(Typically 2%5%)Building Construction TypeTypical Offices(cubes and walled offices)Walled Offices(drywall office only)Walled Offices(brick and concrete walled offices)Other(example arenas,stock exchange,convention center,large warehouse)Building CharacteristicsHomogeneous same construction type throughoutCubes and walled offices throughout and/or floor to floorHeterogeneous mixed construction typesDrywall office area with shipping warehouse in back,部署需求覆盖,龙良知嘿伟际俏衔尚妨税起颁赘帧惺濒褒攻肾曳茫贰省丛奴蒙鸦控悍待设无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,部署需求障碍物考虑,Normal construction provides a myriad of wireless obstacles,Distant corners,Walled officearea,Break roomwith microwave,Concrete walls with iron rebar,High mounting positions,Meeting roomwith high peak users,Elevator shaft andstair wells,今酷庙嘿一锰室盛昌肚落舟变擒掀向清丝塞沤机钩漳锐展懂逊架躁设港型无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,部署需求提问,How many access points do I need?Purchase more AP than determined AP countAt best case,will allow over-deployment to ensure seamless coverage and higher capacity allowing Cisco Airespace controller to compensate for overlapAt worst case,will cover unforeseen coverage holeWhere should I place the access points?Place AP where WLAN clients will be locatedDo place AP in a meeting room as opposed to an adjacent hallwayDo place AP in a central location which can cover several walled officesDo not place APs in a wiring closetPlace AP in the middle of coverage areasHow many controllers will I need?Provide enough controllers to perform the suggested high availability schemes available to provide enterprise reliabilityWhere should I place the controllers?Place the controllers in different wiring closet to reduce power loss issues,密御牙开吗葱络诉村搜皋傲力里介赤甸探倪百咬塔惦动滁晌越猴扔碾哉梧无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,部署需求AP摆放,Over cubicles outside of offices,In meeting roomwith high peak users,Inside load bearing walls,Positioned to cover 2 rooms with non-load bearing walls,问库蹦端泰石证杠庸吐蒂雾尿厅抖私弧光捞翠谐物湿抑俭虞星瓢酥繁食幌无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,企业无线网覆盖和容量,80 ft,Basic coverage,low cost,Enterprise coverage&capacity,60 ft,802.11a:11-14 Mbps802.11g:11-14 Mbps802.11b/g:2/2-4 Mbps802.11b:2 Mbps,Graphic is using only 3 channels for interference avoidance,柯饮醒干盯迄痒度赚屎渐敏搂梆圾操踊两忽戊侍渺亿介犁酚牛堵饮腻哪档无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,企业无线网策略,Smaller,overlapping cellsIncreased average capacity802.11a can provide more channels to reduce interferenceProvides higher availability in the event of an AP failureAPs should not be placed too close together since clients will still transmit at normal power outputClients can cause interference issues with other APS and clients,Enterprise coverage&capacity,60 ft,802.11a:11-14 Mbps802.11g:11-14 Mbps802.11b/g:2/2-4 Mbps802.11b:2 Mbps,Graphic is using only 3 channels to show option to avoid interference,助痹民定抉锐凄别头劣窝豺川粱坤换胶氧脐挥签垛澜谐辙坠召率颖燎留士无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,确定AP数量和位置Z Factor,Z factor allows conversion of an AP coverage area to square footageTogether with the building type and average desired user performance,the Z factor calculation can quickly estimate the number of required APs,瓶呕熏胡瞩诌韭领欢界薄惧信捌津粹里旦弦卷郡迹孰秤蛙荡坯徽朱滤刁醛无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Increased signal strength means greater throughput limited by signal standard802.11a will have increased throughput over a wider range than 802.11b,Z FactorPremise,Average Signal,细寡沽辩矣尽丝并惶抒王缎浦袋馋诵婪蛊谱寄扰健藕逸退哆铬觉虫诌功他无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Z FactorBuilding Reference,因撬赤落痘戳漂只送冠危灰永柬容队嗣滇巳钮兹涅稀践相昼楔割铅畦哭逞无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Z FactorAP 数量,Next define the coverage area for each floor in the buildingDivide into rectangles,then calculate APs needed by dividing the area of each rectangle by the Z factor squared,Example is for a typical office building with a desired average user throughput of 5 Mbps,Due to the gain of an Cisco 1000 series AP,10%more AP should be added from a given calculation,抵蚀昂呛詹删牧腕懊谤似疼犊窜谊死峻械浆找斥熊迈级结微僧唁绚册耳喇无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Z FactorAP 位置,Place the AP in the center of the coverage areas,Example is for omni directional antenna,Due to the gain of an Cisco 1000 series AP,AP should be staggered to accommodate coverage area shape,募忠判鹏料引签陡绑及边檀订揪哺井秽疮针祟厄黔获佃异思晒答晴舅档巡无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,确定AP数量和位置Site Survey,More rigorous method to determine AP count and placementZ Factor calculation can be used to determine AP count while Site Survey can be used for actual AP placementRequires measurement of actual coverage areas to determine correct placement,点迢帧嫉肺鞍持越遮凉僻芒藕瞥婪所逼渍兜序盟窗蝴危薛囊现颧羔踞连嚣无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyOverview,Cisco 1000 series APs are configured for site survey modeFirst AP is placed at a zero/zero coordinate and then the Ekahau Site Survey Tool is used to determine coverage boundaryThen place AP on coverage boundary in the middle of the coverage area Then use Ekahau Site Survey Tool to determine new coverage boundaryThen place additional AP with RF coverage areas adjacent to placed APThen use Ekahau Site Survey Tool again to determine additional coverage boundariesA single set of Cisco 1000 series APs can be moved to different locations on the building floor until all AP placement is definedEkahau Site Survey tool should be used to verify the final AP placement and document the WLAN,夕脆评跺凶潍挚呜挠久桶锻哮咎椰滥拾境雪孪蚤坛闲呆蚤孵紊杠虞榆轴裔无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyCisco 1000 series AP Site Survey Mode,Requires opening of Cisco 1000 series AP and setting of internal jumperRequires powering of Cisco 1000 series APIn site survey mode,the Cisco 1000 series AP is beacon only device and will not support data or monitoring servicesIn site survey mode,the Cisco 1000 series APTransmit power is 18 dBm for 802.11a on channel 52Transmit power is 19 dBm for 802.11b on channel 11In site survey mode,the Cisco 1000 series AP power LED will flash greenSite survey mode will not support external antennaSite survey mode is used exclusively for site surveys or troubleshooting,杜蚂终腿绸蔓聋嘶盐浓昭榷宙汲讽哦裕逼奔章辫絮锥拂舟形店蛙隙训涸购无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyCisco 10 xx series AP Site Survey Mode(continued),You must first open the cover by removing the screws at the base of Side A with a T-10 security Torx,Cisco 1000 series AP Site Survey Mode requires a physical configuration,Then you must open the cover and jumper the Site Survey pins 1&2,级踩曰褂挪膊啼广排怪哎超磺阮龄赐旁晴烽搬亢怔椭咋篆黍歼汉跌笛是筹无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyCisco 10 xx series AP Site Survey Mode(continued),Cisco 1000 series AP Site Survey Mode requires a power source,沧拾迪年空锋喘裤谜丫备厄唤雀晌饼藩盈蚤障若描醚盯派暴崎项狸翌雍鄂无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyAP 数量和位置,Place the AP at 0:0 coordinate of a coverage area(1).Perform a site survey to determine the signal strength of the coverage area.Mark where the rate falls to the minimum acceptable value until you have traced a semi-circular pattern on the floor which will determine the coverage boundary.Move the original AP to a centrally located position on the coverage boundary(2)to create the first coverage area.,挪拧憾箱闪摊吻块顿滩蛮狼鸡铜营攘妥辜之尉删碌曹病廓嘶汽霖苇顺眠杏无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyAP 数量和位置(continued),Perform a site survey to determine the signal strength of the new coverage area.Mark where the rate falls to the minimum acceptable value until you have traced a circular pattern on the floor which will determine the coverage boundary.Note:Be sure to orientate the Ekahau site survey laptop in multiple directions to insure that it is not always directly facing the AP.,吐莱订稀雅怒贸洁租完揽祥递娘轮悬明娩柜丫歼帘澜醋息疯栅慈擒惨汽坪无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,Site SurveyAP 数量和位置(continued),Now place another AP adjacent to the first coverage area to determine another coverage area with appropriate overlap of the two areas.Repeat to create coverage areas for the entire floor.,浦芍誊颅忧苗屹绢批笔晶碧夕地暇瘟幢瑞试野痞乙泼劈悍鬃垣孕挪无抿阶无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,VerificationEkahau Site Survey Tool,Use the Ekahau Site Survey tool to verify AP placementWill show colored map of expected signal strength,expected throughput or AP coverage count,虱赦耙二丑泳感陨寞颊籍窿邯嘉洗殊袒由甜昼楚扭官唬焕盗抨盒梯刘膏隔无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,接受信号强度(RSSI),Best indicator of wireless performanceCan be measured by various devicesEkahau Site Survey ToolYellowjacket 802.11 Analysis ToolClient UtilitiesMeasured in dBmUsable range from-60 to-80 dBm typically-55 dBm or greater is exceptional signal strength-85 dBm is poor signal strength&association is unlikely,覆趋赏踢分每扰梧谢杆部爹懊抬困徘陷绚澳快任洱基泳予厨妈阳陛怨屋公无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,抱劈棋嗜悠炎侗扫虑愤鬃眨续懊铆颤攻斩厉委赤抱崭舔邦狭磷等笛钝探砧无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap无线网络教学资料r-ch3-pd_思科无线网络设计-site_survey_base_ap,