【科普系列】交换机知识知多少
<section style="background-color: rgb(255, 255, 255); box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="background-color: rgb(160, 160, 160); height: 1px; box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin: 15px 0%; transform: translate3d(0px, 0px, 0px); -webkit-transform: translate3d(0px, 0px, 0px); -moz-transform: translate3d(0px, 0px, 0px); -o-transform: translate3d(0px, 0px, 0px);box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; width: 15%; padding-right: 1px; padding-left: 1px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-right: 0%; margin-bottom: 10px; margin-left: 0%; text-align: center; transform: translate3d(0px, 0px, 0px); font-size: 17.6px;box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; border-left: 1px solid rgb(160, 160, 160); border-right: 1px solid rgb(160, 160, 160); padding-right: 5px; padding-left: 5px; color: rgb(70, 187, 231); box-sizing: border-box;"><p style="display: inline-block; width: 1em; margin-right: 0.2em; margin-left: 0.2em; float: right; clear: none; box-sizing: border-box;">前言</p><p class="" style="line-height: 0; box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section><section class="" style="display: inline-block; vertical-align: top; width: 85%; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" transform: translate3d(0px, 0px, 0px); -webkit-transform: translate3d(0px, 0px, 0px); -moz-transform: translate3d(0px, 0px, 0px); -o-transform: translate3d(0px, 0px, 0px);box-sizing: border-box; "><section class="" style="text-align: justify; color: rgb(102, 102, 102); font-size: 15px; line-height: 1.8; box-sizing: border-box;"><p style="white-space: normal; box-sizing: border-box;">关于交换机，你知道多少？今天，小编就跟大家一起唠嗑唠嗑有关交换机方面的一些小知识吧！</p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="background-color: rgb(160, 160, 160); height: 1px; box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(255, 228, 200); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">我想问下POE交换机与普通交换机的区别?</strong></p></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em; text-align: right;box-sizing: border-box; "><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(188, 227, 249); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" text-align: left;box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;">传统的交换机只能实现数据传输，而POE交换机支持通过网线给终端供电。相对而言，使用POE交换机后，减少了大量电源线连接，在一定程度上提高了用电安全。POE技术通过网线传输直流电，针对输出电流在网线中的传输采取了一系列安全保护措施（短路、过载、浪涌防护等）。同时POE交换机可智能检测终端是否支持POE，在接入非POE终端时不会供电，从而很好的兼容了普通交换机的功能。</p></section></section></section></section> </section><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;">康康</p></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(255, 228, 200); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">POE交换机功率如何计算的呢？</strong></p></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em; text-align: right;box-sizing: border-box; "><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(188, 227, 249); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" text-align: left;box-sizing: border-box; "><section class="" style="text-align: right; box-sizing: border-box;"><p style="text-align: left; box-sizing: border-box;">以海康POE交换机为例，通过查询交换机Spec表，得到相关型号的POE参数</p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="text-align: left; box-sizing: border-box;"><p style="box-sizing: border-box;">以型号DS-3E0326P-E举例</p><p style="box-sizing: border-box;">①n个802.3at的终端，m个802.3af的终端</p><p style="box-sizing: border-box;">②单台受电端（通常指IPC）功率≤25.5W</p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="text-align: left; box-sizing: border-box;"><p style="box-sizing: border-box;">通过以上计算，我们就可以知道相关型号的POE交换机到底可以接入多少路不同功率的IPC了。<br style="box-sizing: border-box;"></p></section></section></section></section> </section><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;">康康</p></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(255, 228, 200); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">什么是交换容量？</strong></p></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em; text-align: right;box-sizing: border-box; "><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(188, 227, 249); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" text-align: left;box-sizing: border-box; "><section class="" style="text-align: right; box-sizing: border-box;"><p style="text-align: left; box-sizing: border-box;">交换容量是交换机接口处理器或接口卡和数据总线间所能吞吐的最大数据量。它标志了交换机总的数据交换能力，单位为Gbps(框式交换机称为背板带宽，盒式交换机称为交换容量)</p><p style="text-align: left; box-sizing: border-box;">计算方法：端口数*相应端口速率*2（全双工模式），如果总带宽≤标称背板面宽，那么在背板带宽上是线速的。以交换机DS-3E2326-H举例说明，其端口规格为24个百兆电口+2个千兆光电复用口，其理论交换容量为24*0.1*2+2*1*2=8.8Gbps，查询产品SPEC我们可以得知该款型号实际交换容量达64Gbps，因此DS-3E2326-H这款交换机是线速转发的。</p></section></section></section></section> </section><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;">康康</p></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(255, 228, 200); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">什么是包转发率?</strong></p></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em; text-align: right;box-sizing: border-box; "><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(188, 227, 249); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" text-align: left;box-sizing: border-box; "><section class="" style="text-align: right; box-sizing: border-box;"><p style="text-align: left; box-sizing: border-box;">交换机的包转发率标志了交换机转发数据包能力的大小。单位一般为pps(包每秒)。包转发速率是指交换机每秒可以转发多少百万个数据包（Mpps），即交换机能同时转发的数据包的数量。</p><p style="text-align: left; box-sizing: border-box;">计算方法：包转发率=千兆端口数量*1.488Mpps+百兆端口数量*0.1488Mpps+其余类型端口数*相应计算方法</p><p style="text-align: left; box-sizing: border-box;">还是以DS-3E2326-H举例说明，其理论包转发率应该为24*0.1488Mpps+2*1.488=6.5472Mpps</p></section></section></section></section> </section><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;">康康</p></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em;box-sizing: border-box; "><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(255, 228, 200); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">交换容量与包转发率的区别？</strong></p></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 0.5em; margin-bottom: 0.5em; text-align: right;box-sizing: border-box; "><section class="" style="display: inline-block; width: 75%; box-sizing: border-box;"><section class="" style="display: inline-block; width: 85%; margin-top: 11px; border-radius: 16px; background-color: rgb(188, 227, 249); padding: 16px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" text-align: left;box-sizing: border-box; "><section class="" style="text-align: right; box-sizing: border-box;"><p style="text-align: left; box-sizing: border-box;">包转发率以数据包为单位体现了交换机的交换能力，透过该值我们知道交换机单位时间内同时能处理的数据包有多少。</p><p style="text-align: left; box-sizing: border-box;">交换容量是以数据总量为单位体现交换机的交换能力，透过该值我们知道交换机单位时间内能够处理的最大数据量是多少。</p><p style="text-align: left; box-sizing: border-box;">二者并无直接关系，只是从不同的维度对交换机的性能做了一个参照描述而已。</p></section></section></section></section> </section><section class="" style="display: inline-block; width: 60px; vertical-align: top; box-sizing: border-box;"> <section class="" style="font-size: 12.8px; color: rgb(62, 62, 62); text-align: center; box-sizing: border-box;"><p style="box-sizing: border-box;">康康</p></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; width: 20%; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-right: 0%; margin-left: 0%;box-sizing: border-box; "></section></section></section><section class="" style="display: inline-block; vertical-align: top; width: 80%; padding-left: 5px; box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style=" box-sizing: border-box; "><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" margin-top: 10px; margin-bottom: 10px; transform: translate3d(0px, 0px, 0px); -webkit-transform: translate3d(0px, 0px, 0px); -moz-transform: translate3d(0px, 0px, 0px); -o-transform: translate3d(0px, 0px, 0px);box-sizing: border-box; "><section class="" style="display: inline-block; vertical-align: top; margin-bottom: -10px; box-sizing: border-box;"><section class="" style="border-bottom: 2px solid rgb(0, 175, 236); background-color: rgb(254, 255, 255); padding-right: 5px; padding-left: 5px; box-sizing: border-box;"><p style="box-sizing: border-box;">好啦~今天的唠嗑就此结束啦！相信大家一定get到了一些新技能了吧！</p><p style="box-sizing: border-box;">扫描二维码，下载我吧</p></section><section style="display: inline-block; text-align: center; vertical-align: top; margin-top: -2px; box-sizing: border-box;"><section style="width: 0px; border-top: 8px solid rgb(0, 175, 236); border-left: 8px solid rgb(0, 175, 236); border-right: 8px solid transparent !important; border-bottom: 8px solid transparent !important; box-sizing: border-box;"></section><section style="width: 0px; border-top: 6px solid rgb(255, 255, 255); border-left: 5px solid rgb(255, 255, 255); margin-top: -16px; margin-left: 2px; border-right: 5px solid transparent !important; border-bottom: 6px solid transparent !important; box-sizing: border-box;"></section></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style=" box-sizing: border-box; " powered-by="xiumi.us"><section class="" style=" text-align: center; margin-top: 10px; margin-bottom: 10px;box-sizing: border-box; "></section></section></section><p><br></p>
页:
[1]