Juniper高性能交換機(jī)產(chǎn)品介紹

Juniper高性能交換產(chǎn)品介紹陳劍2010.3.2高性能的EX系列交換機(jī)平臺(tái)EX4200EX8216EX8208EX2200EX3200EX4500OperationalSimplicityCarrier-classReliabilityIntegratedSecurityEX8216

21RU(1/2rack),25”deep模塊化結(jié)構(gòu)JUNOSsoftware1+1RoutingEngines8塊交換矩陣63kWpowersuppliesTwofantrays高性能12.4T交換容量1.92Bpps所有端口二層三層線速所有包長(zhǎng)線速無(wú)阻塞矩陣高密度線速端口最大768GbE,128線速10GbEports100GreadyFanTray(side-sideairflow)LCD顯示屏16個(gè)320G交換容量的線卡插槽1+1冗余的路由引擎6PSUbaysforN+1ACorN+NDCredundancy(12000Wmax)FanTrayEX8208–ChassisOverview背板帶寬6.2T包轉(zhuǎn)發(fā)率960Mpps最大384個(gè)千兆或64個(gè)萬(wàn)兆線速接口高度14RU,深度21″每個(gè)標(biāo)準(zhǔn)機(jī)柜可安裝三個(gè)機(jī)框所有組件在前面板LCD控制板輕松的系統(tǒng)識(shí)別和監(jiān)控兩種發(fā)貨選擇基本配置:1SRE,1SF,風(fēng)扇盤(pán),

22kWAC電源冗余配置:2SRE,1SF,風(fēng)扇盤(pán),

62kWAC電源EX4500高密度萬(wàn)兆匯聚交換機(jī)40個(gè)固定萬(wàn)兆SFP+端口，2個(gè)上聯(lián)端口擴(kuò)展槽960Gbps交換容量，720Mpps包轉(zhuǎn)發(fā)能力上聯(lián)端口模塊4個(gè)萬(wàn)兆SFP+端口模塊JUNOS操作系統(tǒng)與EX4500之間256G或更高的虛擬背板連接與EX4200128Gbps虛擬背板互連可支持最多10臺(tái)設(shè)備擴(kuò)展最多端口數(shù)可達(dá)480萬(wàn)兆LCD顯示2RU高EX4200集群交換系列24或4810/100/1000固定端口，靈活的上聯(lián)端口擴(kuò)展槽上聯(lián)端口模塊4個(gè)千兆SFP端口模塊2個(gè)萬(wàn)兆XFP端口模塊JUNOS操作系統(tǒng)冗余熱插拔內(nèi)部電源和風(fēng)扇系統(tǒng)*支持標(biāo)準(zhǔn)的class3POE供電(15.4W)128Gbps虛擬背板互連可支持最多10臺(tái)設(shè)備擴(kuò)展最多端口數(shù)可達(dá)2010GbE+48010/100/1000LCD顯示1RU高#PortsPortTypePoE

PortsMaxPowerConsumption(incl.PoE)2410/100/1000B-T8190(320)W2410/100/1000B-T24190(600)W24100B-FX/1000B-XN/A190(190)W4810/100/1000B-T8190(320)W4810/100/1000B-T48190(930)WRouteEngineLineCard為什么選擇模塊化交換機(jī)？高可靠性冗余引擎冗余矩陣冗余電源和散熱易于管理一個(gè)OS一個(gè)配置一個(gè)管理地址性能和可擴(kuò)展性模塊化大容量的背板和插槽模塊化交換機(jī)與EX4500、4200的集群交換技術(shù)比較上述一切，EX4200的VC完全具備，除此以外，VC還具備物理部署的靈活性按需采購(gòu)的靈活性更加節(jié)能更少的散熱要求更少的空間要求

128Gb/sbackplane典型應(yīng)用場(chǎng)景——數(shù)據(jù)中心機(jī)架上聯(lián)交換機(jī)每個(gè)機(jī)柜部署一臺(tái)EX4200通過(guò)VC技術(shù)將最多10臺(tái)EX4200虛擬為一臺(tái)一個(gè)邏輯交換機(jī)作為10個(gè)機(jī)柜的上聯(lián)交換機(jī)最大可支持480GbEserverportsand1610GbEuplinks2+8MasterredundancySpatialseparationofMasterandBackupRE10GbEUplinks10GbEVirtualChassisExtension64GbEDedicatedVirtualChassisRE0RE1LCVirtualChassisMasterVirtualChassisBackupVirtualChassisLineCardRow1Uplink(LAG1)Uplink(LAG2)Rack1Rack2Rack3Rack4Rack5RE0LCLCLCLCRow2Uplink(LAG1)Uplink(LAG2)Rack1Rack2Rack3Rack4Rack5LCLCLCLCRE1如同管理一個(gè)單一機(jī)箱典型應(yīng)用環(huán)境——園區(qū)網(wǎng)樓宇間互聯(lián)EX3200固定端口系列24或4810/100/1000固定電口，靈活的上聯(lián)端口擴(kuò)展槽上聯(lián)端口模塊4個(gè)千兆SFP端口模塊2個(gè)萬(wàn)兆XFP端口模塊JUNOS操作系統(tǒng)可拆卸更換的電源和風(fēng)扇支持標(biāo)準(zhǔn)的class3POE供電(15.4W)支持外接的冗余供電系統(tǒng)LCD顯示1RU高#PortsPortTypePoE

PortsMaxPowerConsumption

(incl.PoE)2410/100/1000B-T8190(320)W2410/100/1000B-T24190(600)W4810/100/1000B-T8190(320)W4810/100/1000B-T48190(930)WEX2200固定端口系列固定接口配置24or48ports可選PoE型號(hào)4SFPuplinks與高端一致的JunOS操作系統(tǒng)軟件所有接口全部線速千兆三層接入#PortsPortTypePoE

PortsFixedUplinksMaxPowerConsumption

(PoEPower)2410/100/1000B-T04SFP100(0)W2410/100/1000B-T244SFP550(450)W4810/100/1000B-T04SFP100(0)W4810/100/1000B-T484SFP550(450)W*Roadmap推薦JuniperEX的X大理由優(yōu)異的性能、良好的擴(kuò)展能力：保障您若干年的穩(wěn)定使用。電信級(jí)的模塊化OS：維護(hù)不再中斷應(yīng)用從桌面到核心的L3Ready能力：使您領(lǐng)先下一步改造。全模塊化的先進(jìn)硬件設(shè)計(jì)：靈活配置，處理優(yōu)化。NSM統(tǒng)一網(wǎng)管系統(tǒng)：集中控管，一目了然。配合在網(wǎng)其他Juniper產(chǎn)品，構(gòu)造內(nèi)網(wǎng)控管：UACReady。LeveragesJUNOSInfrastructure:模塊化架構(gòu)控制平面和轉(zhuǎn)發(fā)平面完全分離線速轉(zhuǎn)發(fā)JUNOSCLI:hierarchical,2-phasecommitLeveragesScreenOSSecurity久經(jīng)考驗(yàn)的安全EXArchitecture精細(xì)的QoS功能SAP;Oracle;HTTP;IPTelephoVoicemail;VideoConferencing;InstantMessaging;ERP;HR;CRM;BackupReplication:E-mail:VideoNetworkManagement;SAP;ERP;Oracle;HTTP;IPTelephony:Voicemail;VideoConferencing;InstantMessaging;ERP;HR;CRM;BackupReplication:E-mail;OracleNetworkManagement;SAP;Oracle;HTTP;IPTelephony:8queuesperport

onallportsMarkatLayer2(802.1p)orLayer3(ToS,DSCP)Classifyatlayers2–4Today’sapplicationmixrequires8queues:Real-time,transaction,bulkdata,voice,videoconferencing,controlplanemanagement,buildingmanagementQoSACLscanbeactivatedpersessionwithUACConsistentQoSconfigurationtoolsacrossJUNOSdevices7.NetworkControl…

6.Real-timeApplications…5.VoiceTraffic…4.Video…3.TransactionApplications…2.BuildingManagement…1.BestEffort…0.SNMP電信級(jí)的精髓Junos軟件

SwitchesRoutersModule

XAPI2Q089.11Q089.04Q078.5OneOSOneReleaseOneArchitecture電信級(jí)的精髓

JUNOS軟件:高性能業(yè)務(wù)的網(wǎng)絡(luò)操作系統(tǒng)自1998年起開(kāi)始部署首款高性能網(wǎng)絡(luò)操作系統(tǒng)十余年的創(chuàng)新和開(kāi)發(fā)

整合路由器、交換機(jī)和安全平臺(tái)

卓越的高性能操作每年按計(jì)劃進(jìn)行4次升級(jí);數(shù)千種特性為要求最嚴(yán)苛的客戶提供服務(wù)40余家頂級(jí)服務(wù)供應(yīng)商高性能企業(yè)和公共部門(mén)客戶單一模塊軟件架構(gòu)

單機(jī)模塊內(nèi)存受保護(hù)，更穩(wěn)定

無(wú)覆蓋兼容錯(cuò)誤能夠迅速進(jìn)行錯(cuò)誤隔離獨(dú)立重啟實(shí)現(xiàn)靈活創(chuàng)新模塊n模塊3模塊1核心控制層模塊4模塊2High-LevelArchitecture封包

轉(zhuǎn)發(fā)轉(zhuǎn)發(fā)服務(wù)物理接口轉(zhuǎn)發(fā)層控制層和封包轉(zhuǎn)發(fā)隔離

確保性能提升彈性實(shí)現(xiàn)冗余防火墻控制層

強(qiáng)大的統(tǒng)一接入控制UACAgent802.1X

SwitchFirewall受控訪問(wèn)資源通過(guò)EX-series交換機(jī)以及SSG/ISG防火墻實(shí)現(xiàn)安全策略部署IC可以基于用戶帳號(hào)和設(shè)備端口動(dòng)態(tài)推送配置策略給EX交換機(jī)。EX交換機(jī)基于RadiusVSA擴(kuò)展屬性，可以動(dòng)態(tài)的根據(jù)userprofile定義的信息，動(dòng)態(tài)部署QOS，時(shí)間策略，vlan分配以及其他端口配置參數(shù)，從而實(shí)現(xiàn)高級(jí)別的業(yè)務(wù)能力。AAA動(dòng)態(tài)的策略部署身份識(shí)別及資料AAA用戶，終端策略部署統(tǒng)一接入控制標(biāo)準(zhǔn)的802.1X支持，同時(shí)擴(kuò)展功能：可以基于交換機(jī)靜態(tài)MAC地址表進(jìn)行認(rèn)證?；赗adius，實(shí)現(xiàn)動(dòng)態(tài)VLAN功能。支持GuestVLAN支持VoiceVLAN基于RadiusVSA屬性，實(shí)現(xiàn)三層防火墻/IDS動(dòng)態(tài)聯(lián)動(dòng)支持IPtelephones的802.1X認(rèn)證。SupplicantsVLANID10VLANID9Switch(802.1Xenabled)AuthenticationServer

開(kāi)放的統(tǒng)一通信平臺(tái)Auto-senseIPphonesLLDP,LLDP-MEDPoweroverEthernetFullClass3(15.4W)802.1XAccesscontrolMultiplesupplicantsperportGranularQoS8queuesperportonallportsStrictpriorityqueueingCarrier-classavailabilityRedundantcomponentsJUNOSsoftware8PoEportsinthe

24Tand48Tmodels靈活的PoEinEverySwitchFullClass3PoERequiresonlyonepowersupplyIPTelephonydeploymentsneedallPoEportsLowercostswiththe“T”skusforlowdensityPoEWirelessaccesspointsSurveillancecameras24or48PoEportsinthe24Pand48Pmodels廣泛支持的網(wǎng)管平臺(tái)Telnet

SSH

XMLHTTP

HTTPS

XMLNetConf

DMI

Syslog

SflowSNMP

SyslogJuniperEX-seriesOpen,Standards-basedManagementJUNOSCLITelnet,SSHJUNOScript:AutomatedConfiguration,OperationsJ-WebQuickSetupwithTemplatesDashboardViewPerformanceMonitoringJuniperNSMDiscovery&ConfigurationPolicyManagementInventoryManagementLogManagementDeviceManagementNetwork&SecurityManagementThirdpartyNMSJuniperSTRMThreatDetectionEventLogManagementCompliance&ITEfficiency網(wǎng)元管理：J-WebEasyInitialSetupEnablesfastdeploymentwith

minimumconfigurationstepsDashboardwithChassisViewDynamicstatusupdate

ofsystem&portsFeatureConfigurationTemplates:VLAN,802.1X,Security&QoSNetworking:VLAN,PoE,LLDP,LinkAggregation,Chassis,PortMirroringSecurity:802.1X,ACLPerformanceMonitoringReal-timeMonitoringGraphsSystem,ports,VLAN,PoE,Chassis802.1X,PortSecurityTroubleshooting&MaintenanceFirmware&confupgrade/rollbackBasictroubleshootingtasks

統(tǒng)一網(wǎng)管平臺(tái)：NSMandNSMXpress?DevicemanagementDevicediscovery&deploymentRoleBasedAdministrationURLlinktoJ-WebConfigurationManagementTemplatebasedconfigurationofoneorseveralswitchesConfigurationversionmanagementInventoryManagementHardware&softwareinventoryAutomatedoron-demand

inventoryupdatesViewingdevicelicensesMonitoring&TroubleshootingLogFiltering&ReportingStatusmonitoring廣泛的第三方網(wǎng)管平臺(tái)無(wú)縫集成

VENDORPRODUCTDESCRIPTIONOpenViewNNMv7.5Devicediscovery,collectionoftrapsandalarms,anddevicehealthmonitoringOpsWareNetworkAutomationCentralizedconfiguration&changemanagementTivoliNetViewv7.1.5Devicediscovery,collectionoftrapsandalarms,anddevicehealthmonitoring,launchofJ-WebdevicemanagerTivoliNetCoolOmniBusv7.1Centralizedfaultmanagementincludingdiscovery,andtrapandalarmcorrelationanddevicemonitoringTivoliIPNetworkManagerv3.7IPbasedlayer3networkvisualizationandtopologybasedeventcorrelationSpectrumv8.1Centralizedfaultmanagementincludingdiscovery,andtrapandalarmcorrelationanddevicemonitoringeHealthv6.0CentralizedperformancemanagementVistaInsightv3.0CentralizedperformancemanagementSmartsv7.03Centralizedfaultmanagementincludingdiscovery,alarmcorrelation競(jìng)爭(zhēng)分析JuniperEXvs.CiscoCatalystEX2200主要競(jìng)爭(zhēng)型號(hào)：C2960G和C3560/GEX3200主競(jìng)爭(zhēng)型號(hào)：C3560E和3560GEX4200、EX4500主競(jìng)爭(zhēng)型號(hào)：C3750E和3750G和C4948、C4900M、C4500系統(tǒng)EX8200競(jìng)爭(zhēng)型號(hào)：Nexus7000、Catalyst6500，EX2200vsC296024P/24T48P/48T24/48TS24/48PS48TC24TC交換容量56Gbps104Gbps32Gbps32Gbps32Gbps32Gbps包轉(zhuǎn)發(fā)率42Mpps77Mpps38.7Mpps38.7Mpps39Mpps35.7MppsQoS每端口隊(duì)列884444PoE支持24/048/0No24/48NoNo三層功能YYYYNN接口數(shù)量24+4SFP48+4SFP24或48+4SFP24或48+4SFP24（4個(gè)combo）24（4個(gè)combo參數(shù)型號(hào)EX2200C3560GC2960EX3200vsC3560G/E24P/24T48P/48T24/48TS24/48PS24/48TD24/48PD交換容量88Gbps136Gbps32Gbps32Gbps64Gbps64Gbps包轉(zhuǎn)發(fā)率65Mpps101Mpps38.7Mpps38.7Mpps95Mpps95MppsQoS每端口隊(duì)列88444410GE22NoNo22PoE支持8/248/48No24/48No24/48模塊化風(fēng)扇支持支持不支持不支持不支持不支持參數(shù)型號(hào)EX3200C3560GC3560EEX4200vsC3750G/E24P/24T48P/48T24/48TS24/48PS24/48TD24/48PD交換容量88Gbps136Gbps32Gbps32Gbps160Gbps160Gbps包轉(zhuǎn)發(fā)率65Mpps101Mpps38.7Mpps38.7Mpps65.5/101.2Mpps65.5/101.2Mpps堆疊背板帶寬128Gbps128Gbps32Gbps32Gbps64Gbps64GbpsQoS每端口隊(duì)列884444主備引擎支持支持不支持不支持不支持不支持堆疊數(shù)量1010999910GE22NoNo22PoE支持8/248/48No24/48No24/48VLAN數(shù)量4k4k1k1k1k1k冗余電源支持支持外置外置外置外置模塊化風(fēng)扇支持支持不支持不支持不支持不支持參數(shù)型號(hào)EX4200C3750GC3750EEX4200vsC494848P/48TC4948C4948-10G交換容量136Gbps96Gbps136Gbps包轉(zhuǎn)發(fā)率101Mpps72Mpps102Mpps堆疊數(shù)量1000主備引擎支持不支持不支持10GE2No2PoE支持8/48NoNoVLAN數(shù)量4k4k4k冗余電源支持支持支持參數(shù)型號(hào)EX4200-48C4948C4948-10GEX4500vsC4900MEX4500C4900M交換容量960Gbps320Gbps包轉(zhuǎn)發(fā)率720Mpps250MppsIPv4125MIPv6堆疊數(shù)量100主備引擎支持不支持10GE4824GE4840VLAN數(shù)量4k4k冗余電源支持支持參數(shù)型號(hào)EX4200vsC4500E24P/24T48P/48TC4500C4500E交換容量88Gbps136Gbps64G/136G320Gbps包轉(zhuǎn)發(fā)率65Mpps101Mpps48M/101Mpps250Mpps單槽吞吐88G136G12G48GQoS每端口隊(duì)列8848主備引擎支持支持支持支持轉(zhuǎn)發(fā)方式分布式分布式集中式集中式10GE2020234非線速PoE支持8/248/4824/4824/48空間電源制冷節(jié)省空間，按需增加板卡空間體積固定，占有面積大節(jié)省電力能源電力能源消耗大空調(diào)制冷消節(jié)省電能空調(diào)制冷消耗電能大參數(shù)型號(hào)EX4200C4500EX8208與Cisco上一代交換機(jī)產(chǎn)品比較JuniperEX8208作為全新一代的核心交換機(jī)產(chǎn)品，產(chǎn)品無(wú)論從單板性能，還是整機(jī)性能來(lái)看，與Cisco上一代的旗艦產(chǎn)品相比有非常明顯的優(yōu)勢(shì)。

JuniperEX8208CiscoCat6509整機(jī)交換帶寬6.20Tbps720Gbps@Sup720整機(jī)包轉(zhuǎn)發(fā)率IPv4：960MppsIPv6：960MppsIPv4：400Mpps@Sup720+67XX模塊+DFC子卡IPv6：200Mpps@Sup720+67XX模塊+DFC子卡單槽交換帶寬320Gbps120Mpps40Gbps@Sup72044Mpps@Sup720接口緩存512MB/萬(wàn)兆42MB/千兆256MB/萬(wàn)兆1MB/千兆線速端口數(shù)384千兆或64萬(wàn)兆280個(gè)千兆或28萬(wàn)兆JuniperEX8208與CiscoNexus7010比較JuniperEX8208CiscoNexus7010整機(jī)交換帶寬6.20Tbps7Tbps整機(jī)包轉(zhuǎn)發(fā)率IPv4：960MppsIPv6：960MppsIPv4：480MppsIPv6：240Mpps接口槽位88單槽交換帶寬320Gbps230Gbps接口緩存512MB/萬(wàn)兆42MB/千兆萬(wàn)兆：共享模式下每端口1MB輸入緩沖，加每4個(gè)端口65MB共享輸入緩沖，每4個(gè)端口80MB輸出緩沖千兆：每端口7.56MB輸入緩沖和6.15MB輸出緩沖線速端口數(shù)384千兆或64萬(wàn)兆384個(gè)千兆或64萬(wàn)兆（64字節(jié)和128字節(jié)大小數(shù)據(jù)包非線速）JuniperEX8216與CiscoNexus7018比較JuniperEX8216CiscoNexus7018操作系統(tǒng)軟件JunOS（成熟運(yùn)用12年以上），界面與原有產(chǎn)品完全一致NX-OS4.0

（基于SANOS開(kāi)發(fā)，與原有產(chǎn)品完全不兼容，界面與IOS不同，沒(méi)有成熟運(yùn)用）整機(jī)交換帶寬12.4Tbps15Tbps整機(jī)包轉(zhuǎn)發(fā)率IPv4：1920

MppsIPv6：1920MppsIPv4：960MppsIPv6：480Mpps接口槽位數(shù)1616單槽交換帶寬320Gbps230Gbps接口緩存512MB/萬(wàn)兆42MB/千兆萬(wàn)兆：共享模式下每端口1MB輸入緩沖，加每4個(gè)端口65MB共享輸入緩沖，每4個(gè)端口80MB輸出緩沖千兆：每端口7.56MB輸入緩沖和6.15MB輸出緩沖線速端口數(shù)768千兆或128萬(wàn)兆768個(gè)千兆或128萬(wàn)兆（64字節(jié)和128字節(jié)大小數(shù)據(jù)包非線速）路由表容量IPv4：512KIPv6：128kIPv4：128kIPv6：2kJuniper與Cisco數(shù)據(jù)中心解決方案比較CISCO傳統(tǒng)的三層結(jié)構(gòu)設(shè)計(jì)Nexus2000必須通過(guò)Nexus進(jìn)行數(shù)據(jù)交換，即使數(shù)據(jù)包在同一rack內(nèi)額外的Nexus2000作為接入層，增加了

延時(shí)，超算比，接口投入同一Nexus2000僅能被一臺(tái)Nexus5000管理，存在單點(diǎn)故障Forthe64bytespacketsize:Nexus2klatency=2μsNexus5klatency=5μsNexus7klatency=21μsReference:CiscoNexus5000SeriesSwitchesDataSheetJUNIPER簡(jiǎn)化數(shù)據(jù)中心部署——二層結(jié)構(gòu)

SinglecontrolplaneusingVirtualChassisVirtualized

securityMSeriesEX8208SRX5800Highdensity,wire-rate10GbEExtendVirtualPrivateLANswithMPLSWANEdgeCoreLayerAccess

Layer低延時(shí)1增加帶寬，減少超算比2節(jié)約空間和電力損耗3易于管理4更好的可靠性和安全性5

Forthe64bytespacketsize:EX4200latency=2.6μsPFE-to-PFElatency=1μsEX8200latency=10μs延時(shí)比較：同一rack內(nèi)同一VLAN間兩臺(tái)server交互Layer3boundaryisontheaggregationlayerNexus7000Port-to-portlatencywithCiscoisasfollows:(2xNexus2000latency)+(1xNexus5000latency)=2*2+5=9μs延時(shí)比較：同一rack內(nèi)同一VLAN間兩臺(tái)server交互SinglecontrolplaneusingVirtualChassisVirtualized

securityMSeriesEX8208SRX5800Highdensity,wire-rate10GbEExtendVirtualPrivateLANswithMPLSWANEdgeCoreLayerAccess

LayerLayer3boundaryisonthecorelayerEX8200Port-to-portlatencywithJuniperisasfollows:localswitchingontheEX4200=2.6μs–28.9%oftheCiscosolution!延時(shí)比較：同一rack內(nèi)不同VLAN間兩臺(tái)server交互Layer3boundaryisontheaggregationlayerNexus7000Port-to-portlatencywithCiscoisasfollows:(2xNexus2000latency)+(2xNexus5000latency)+(1xNexus7000latency)=2*2+5*2+21=35μs延時(shí)比較：同一rack內(nèi)不同VLAN間兩臺(tái)server交互（接入為二層）SinglecontrolplaneusingVirtualChassisVirtualized

securityMSeriesEX8208SRX5800Highdensity,wire-rate10GbEExtendVirtualPrivateLANswithMPLSWANEdgeCoreLayerAccess

LayerLayer3boundaryisonthecorelayerEX8200Port-to-portlatencywithJuniperisasfollows:(2x(EX4200latency+PFE-to-PFElatency)+(1xEX8200latency)=2*(2.6+1)+10=17.2μs–49.1%oftheCiscosolution!延時(shí)比較：同一rack內(nèi)不同VLAN間兩臺(tái)server交互（接入為三層）SinglecontrolplaneusingVirtualChassisVirtualized

securityMSeriesEX8208SRX5800Highdensity,wire-rate10GbEExtendVirtualPrivateLANswithMPLSWANEdgeCoreLayerAccess

LayerLayer3boundaryisonthecorelayerEX4200Port-to-portlatencywithJuniperisasfollows:localswitchingontheEX4200=2.6μs–7.4%oftheCiscosolution!延時(shí)比較：不同rack內(nèi)同一VLAN間兩臺(tái)server交互Layer3boundaryisontheaggregationlayerNexus5000Port-to-portlatencywithCiscoisasfollows:(2xNexus2000latency)+(1xNexus5000latency)=2*2+5=9μs延時(shí)比較：不同rack內(nèi)同一VLAN間兩臺(tái)server交互