22_端口聚合实验解读

1、中山丸辱警示计算机网络实验报告1. 实验报告如有雷同，雷同各方当次实验成绩均以0分计。2. 当次小组成员成绩只计学号、姓名登录在下表中的。0分计。3. 在规定时间内未上交实验报告的，不得以其他方式补交，当次成绩按4. 实验报告文件以PDF格式提交。院系软件学院班级电政一班组长狄志路学号12330072学生狄志路实验分工狄志路设计方案，实现操作，撰写 实验报告【实验题目】端口聚合实验【实验目的】 理解链路聚合的配置及原理。【实验内容】(1) 完成实验教程第三章实例3-5的实验，回答实验提出的问题及实验思考。(P99-102)(2) 端口聚合和生成树都可以实现冗余链路，这两种方式有什么不同？(3)

2、 你认为本实验能实现负载平衡吗？如果不能，请讨论原因并设计方法，进行实验验证。【实验要求】一些重要信息信息需给出截图，注意实验步骤的前后对比。【实验记录】(如有实验拓扑请自行画出,)(1) 【实验名称】端口聚合提供冗余备份链路。【实验目的】理解链路聚合的配置及原理。【背景描述】假设某企业采用两台交换机组成一个局域网，由于很多数据流量是跨过交换机进行转发的，因此需要提高交换机之间的传输带宽，并实现链路冗余备份， 为此网络管理员在两台交换机之间采用两根网线互连，并将相应的两个端口聚合为一个逻辑端口，现要在交换机上做适当配置来实现这一目标。【技术原理】端口聚合(Aggregate-port )又称链

3、路聚合，是指两台交换机之间在物理上将多个端口连接起来， 将多条链路聚合成一条逻辑链路。从而增大链路带宽，解决交换网络中因带宽引起的网络瓶颈问题。 多条物理链路之间能够相互冗余备份，其中任意一条链路断开，不会影响其他链路的正常转发数据。端口聚合遵循IEEE 802.3ad协议的标准。【实现功能】增加交换机之间的传输带宽，并实现链路冗余备份。【实验设备】S3760 (两台)、PC (两台)、直连线(4条)【实验拓扑】按照拓扑图连接网络时注意，两台交换机都配置完端口聚合后，再将两台交换机连接起来。如果 先连线再配置会造成广播风暴，影响交换机的正常工作。计算机网络实验报告SwitchASwitchB【

4、实验步骤】步骤1.（1）按照上图构建网络拓扑结构图注意：利用“图标管理”功能配置的交换机用 C2691的IOS进行模拟。（2）配置模块交换机（Switch A），如下图所示：10 Eoutera,a,a Swi tehASwitchA 节点全局插槽內存磋黑高级交换机（Switch B）-1 Router1,4Swi tchBSwitchB 节点全局适配卡插搏 直级内存磁盘slotslotPC1机，如下图所示：（注意：各 PC机间的本地端口和远程端口号应不同）计算机网络实验报告PC2机，如下图所示:步骤2 标注端口及配置信息:源设备源接口介质类型目标接口目标设备SwitchAF1/1Fastet

5、her netNIO-UDPPC1虚拟机SwitchAF1/2Fastether netF1/2（SwitchB）SwitchBSwitchAF1/3Fastether netF1/3（SwitchB）SwitchBSwitchBF1/1Fastether netNIO-UDPPC2虚拟机步骤3.交换机Switch A上的VLAN配置右键点击交换机Switch A图标，选中“ con sole”，等待交换机初始化后，开始进行如下 配置：计算机网络实验报告SwitchA>enSwitchAvlan d电 Hatalng; It is recoMnended to configure VLA

6、N fram conlig mode/ as VLAN database inode is being- deprecated* Please consult user document at ion for configuring VTP/VL AN m config inode.SwitchA(vlan)vlan 10VLAN 10 modified:SwitchA(vlaa)#exitAPPLY completed.Exiting. *SwitchAconf tEnter conf igurat-ion cormnnds, one per line. End with CNTL/ 1.S

7、witchA(config)int £1/1SwicchA (conf ig-i±) switchpori： access vlan 10SiuitchA(conf ig-if) #exitSmitchA(conf ig) #exit.Swit-chA吉Nrr 1 00:03:13,13: %SYS-5-C0NyIG I: Conf igured frow console by consoXe $却ituhA鄴mhDW rrunning查看配置好的vlan信息，显示如下图:interface Fas匸芒匸11皂匸11巴匸1/1siffitchport- access vla

8、n 10步骤4交换机Switch B上的VLAN配置右键点击交换机Switch B图标，选中“ con sole”，等待交换机初始化后，开始进行如下 配置：SwitchB>enSwiCchB#vlan dWarning: It. is uecomnended to con±igure VLAN fcom confmode, as VLAN database mode is being deprecated Please consulc user docuirientac ion foe conf lgur ing VTP/VLAN in coni mode >Switch

9、B (Talari) #vlan 10VLAN IO added:Maine : VL ATJOOIOSwitchB(vlan)#vlan 10vlan io inodified;SvitchB(vlan)#ex itAPPLY coxtip le teci, Exiting. . * .SwitchBconf tEnter configuration commaiids, one per 1 ine. End with CWTL/ Z .SwitchB(canf ig)#int f1/1SwitchB( con± ig- if) #swivctiporv access vin io

10、SwitchB(con± ig-i±)#ex it SvitchB(con±ig)icSvitchBshou*Mar 1 OO : 07 : 03,3 47 : SYS-SCONF IG_I: G 口 nf iguired from cons 口丄已 loy consol 已 SwitchBsliow running查看配置好的vlan信息，显示如下图:interface FastEtliernet 1/ 1SMitcliport access vlan 10计算机网络实验报告步骤5.交换机Switch A上的端口聚合配置查看f1/2接口状态信息SwitrChAs

11、how inv £1/2 suitcliportName:Fl/2Switchport: EnabledAdminisrearive Mode: static access Operational Hode: sta'Cic access1 (default.)Wat ive Mode VL ATJ:1 (default)VLAMs Enatoled;: ALLVLANs Actlv皀：1fouframes: 0vl an tag pr i ciirit;”： F ALSEAdrrinistrat ive 丁匸口nkzing Encapsulation : dot lq Op

12、erational Trunking Eneapsulation: nat ive Wegotiation of Trunkingi DisatoledAccess Hocle VLAN:Tr unkrincrTr unkimgTrunking Prior ivyOv已匸匕ideVoice VLAN: noneAppliance trust: none查看f1/3接口状态信息SuitchAshow int f1/3 switchportNaine : Fal/ 3Switcliport: EnabledAdministrativs Node: static access Opeuational

13、 Mode: stat ic access Administrative TrunKin Encapsulation: du匸lcj Operational Trunking- Encapsulat icn： native Negot iat ion of Truntring-: D issto led1 (lieiiault-)Native Kode VLAN: 1 (default) VLANs Enabled: ALLVLANs Active:1£or ujitagged frames: 0 vlan tag priorlty: FALSEAccess Mode VLAN:Tn

14、nnking T 匸 uniting Trunking Prlorlty OverrideVoice VLAN: ncne Appliance trust: none将接口 f1/2-3加入到端口聚合链路1中，如图所示SuitchA#conf vEnter configuration corttmandsr one per Line. End with CMTL/Z, SwitcliA (conf ig) #int port-channe 1 1SwitchA(conf ig-if)#*Mar 1 00:12:45牙吒3: LINEPROTO-5-UPDOWN: Line protocol o

15、n Intertac ellf changed stave vo downStfitChA fconX ig-if )# switchport, mode trunkISwitchA (conf ig-if) switch trunk encapsulation dot lq SuitchA(config-if)no shutdownS¥itchA(conf1-if)exitSwitch A (conf igr- if) tfint r amge T 1/ 23SwitcliA con.± lr- 1£-range) tfswlcch. mode trunicSw

16、itch A confif-匚 ange') #uha.mieJLg匸1 me de onSwi tchA ( gqh£ ig if cangre J Afend咒山丸辱计算机网络实验报告SwitchA(config-if-range) #*Har 1 口口 口 .231: DTP-5-TRUNKPORTCN: Port Fal/2-3 has become datlq trunlc Swi匸uhJL(uon土丄旺一i.土一e會nye) #ciEl注nn亡丄一专rtiup 1 mode on.SwitchA(config-if-range)#*Mar 1 00: 11:00.

17、947 : % EC-5-EUNDLE : Interface Fs.1/2 joined porr-chemne 1 Pol *Har 1 00:11:01.027: % EC-5-BUNDLE: Interface Fal/3 joined port-channe1 Pol SwitcIiA(conf ig-if-range) #engMar 1 00:11:03,963: % LINEPROTO-5-UPDOW: Line protoco1 on Interface Port-chann ell, changed state to upSwicchA(config-i±-ran

18、ge)#undSwicchA#*Mar 1 00： 11 ：08T251 SYS-5CONFIG I: Confxureci from console by coftsole查看此时f1/2接口状态信息Sv it ch A# show int fl/ 2 s witcliport Maine: ral/ESvitchpott: EnabledAditiinist rat ive Ho de: trunkOp erat- io nal Mo de : tr unk Crrteinber £ bund Le Pol) AdmirListrat ive Trunking Encapsula

19、tion: dot lqTr unKin EncapBulat-ion: dot lqOperationalNat±v& Mode VLAW: 1 (default) VLATJs Enabled: ALLVLANs Aet ive! none£oe unvagged frames: 0 vlan ta prlorlty: FALSEMegotiation of Trunking: Disabled Access Hade VLAN: 0 (Inactive) Tr unitingTtunki口孑 Tr unking Pr ior ivy Overr ideVo i

20、ce VLAN: noneApp1lance trust: none查看此时f1/3接口状态信息SviiLcliA#slioiiT imt fl/ 3 sisritcliporiL Name: Fal/3SviiLcliporit: EnatoleclAdiwinist-rat ive Mode ; trunkOperational Mode: 匸runk member of toundle Pol) Ac±minist-rat ive Tr unking Encapsulation: dot lq Operational Trunking Encapsulat ion: dlot

21、lq Nego匸i曰匸口n 口壬 Trunking: DisatoledAccess Mode VL AI'-J: O ( (Inacts ive )i JTr unkingr Tr unkingr Tr unkingr Pr ior ity Overr ideMative Mode VL AI'J :1( def ault)VLAlls Enabled: ALLVLAlls Active : nonefor umsagged frames:0vlan 匸日g priority: FALSEVoice VLAIJ: noneAppliance trust: none查看端口聚合

22、链路1的接口状态信息，以及绑定到此接口的物理端口号 ，如下图所示:计算机网络实验报告StiitchA#show interrace port-channel 1Potv-cliannel 1 is up, line puotoco 1 is upHardware is Eth皀匸匚hannel, address is cOOZ * OaeO.f102 (bia c002 * OaeO.f102) MTU 1500 bytes, BW 200000 Kbit, DLY lOOO usee,reliability 255/255, txload 1/255, rxload 1/255Encapsu

23、Lat ion. ARPA, 1 oopback not ser.Keepalive set (10 secFull-duplex, 100Mb/sMeiribers in this channe 1: 7al/2 T'al/SARP type: ARPARP Timeout 04:00:00Last input 00 i 00 : 00 f Otlt-p lit- never T output hang亡匕Last cleaing o£ ,rsliow iiri,cer£ace,r counters neveuInput queue: 0/75/0/0 (size

24、/rtiax/drops/f lustues) ; Total output drops: 0 Queueing strategy: ±1£qOutput- queue: /40 (si£e/itiax)5 minute input rate 0 foit.s/ sec, 0 packets/ sec5 minute utpuv rate bits/secf 0 packets/sec0 packets input, 0 bves, 0 no bufferReceived broadcasts, 00 giants,0 throtvles input errors

25、, 0 CRC, 0 frsittie, D overrun, 0 ignored input packets uith dribble cQndition detected口 packe匸m output, bytes, 0 underruns output errors, 0 collisions 1 interlace resets0 babbles, 0 late callision, 0 deferred步骤6.交换机Switch B上的端口聚合配置查看f1/2接口状态信息SwitrChBSaliow int- £1/2 switchportDlaane: Fal/2Swi

26、cchpoct: Eneib ledAdininist cat ive Mode : st at ic accessOperational Mode: static access1 (default)Nat ive Mode VLAN:1(defaultJVLANs Eneibled: ALLVLANs Act ive:1for untaed fratnes i 0 vlan tag priarity: FALSEAdiriinistrative Trunking Encapaulation: dotlq Op er at ional Tr uniting Encapsulation : na

27、t ive Megotiarion of Trunkingi DisatoledAccess Node VL ATJ :Tr unkingTrunkingTr nil IcingPrlorltyOvert ideVo ice VL AH: noneAppliance trust: none查看f1/3接口状态信息pui'tchBshow int ±1/2 switchport Name: Fal/3Switcltipor t : Enato丄亡dAdministrative Mode: static accessOperational Mode: static accessA

28、dminisiLriL ive Trun托ing Encapsulav ion: do匸lq Operat ional Truniting Encapsulat ion: nat-ive Negor.iar.lon of Trunking: Disato丄亡ciAceesc Hode VLAN:1(default)TrianJcin Trunking TrunkingPr ior ity OverrideNative Hode VLAN: 1(default)VLANs Enabled: ALLVLANs Act ive i 1for untagged frsunes : vlan tag p

29、riority; FALSEVoice VLATJ: noneAu口 丄ianuE匸izu已t : ncinE将接口 f1/2-3加入到端口聚合链路1中，如图所示计算机网络实验报告SwitchE#uonl tEnter conf igurat ion co(inmandsf one per Line . End with. CNTL/ Z .SwitchE(config)#int port-channel 1SvitchB(config-if)witch*Mar 1 00:35:29*939: % LINE PROTO-5-UP DOWN: L ine protocol oil Interfa

30、ce ell, changed state to downSwitchE (conf ig-if) sujitchport mode trunkSuitchB (conf ig-ii) suit-ch ttunk encapsulation dotLqSvit-chB (config-iTi no shuvdovnSvit.chB (con±ig-if) in匸 range ±1/2 一3SvitchB(config-if-range)switch mode trunkSuitchB(config-if-range)样*Mar 1 00:3 6:50.443: DTP-5-

31、TRUNKPORTOW: Fort Fal/2-3 has become dotlq trunk SwitcliB (ccnfig-if-range) Sclianne 1-group 1 mode anSwitchB(config-if-range)channel-group 1 mode onSwicchB(config-if-range) #Har 1 00:21:26.371: %EC-5-BUNDLE: Interface Fal/2 joined port-clianiiE 1 Pol*Mar 1 00:21:26.489: EC-5-BUNDLE: Interface Fal/3

32、 joined port-channe1 Po1 SuitchE(con±ig-if-range) #*Mar 1 00:2 1:29« 387 : L INE PROTO-5-UPDO VTJ: Line protoco 1 on Interface Port-chann ell, changed state to upSwitchB (conf if-ranged #endSvitchE*Mar 1 00:21:39. 199 : SYS-5-C0NFIG I: Configured from conso 1 亡 by console查看此时f1/2接口状态信息Swit

33、chBshow int f 1/2 stfitchp口匸t IJame: Fal/2Swivchport: Enab LedAdministr at-ive Mode : stat ic accessOperat ional Hode :ic accessAdministrative Trunking Encapsulation: dotlq Operational Trunking Encapsuletion: native Wegot-iation of Trunking: Disab丄亡日Access Mode VLAN: Trunking Trunking Tit unking Pr

34、icr ity Cverr ide1(default)Nar ive Made VLAN:1(default)VLANs Enaloled: ALLVLANs Active: 1for untagged fram&3: vLan tag prioi-!ty; FALSEVoice VLAN: noneAppliance trust: nene查看f1/3接口状态信息Maine: Fal/3Switchport: EnabledAdm ini st. rat. ive Mode:匸 runkOperational Mode: trunk (menibar oi bundle Pol) A

35、dministrative Trunking Eneapsultion: dotlq Operational Trunking Encapsulation: dotlq IJegotiation of Trunking: DisabledAccess Mode VLAN: 0 (Inactive)TrunkingTrunkingTrunkingPriority OverrideHat ive Mode VL1N: 1 (defaultj VLANs Enabled: ALLVLANs 直匚匸 ive: nonefor untagged frames: 0 vlanprlerity: FALSE

36、Voice VLAN: noneAppliance trust: none计算机网络实验报告查看端口聚合链路1的接口状态信息，以及绑定到此接口的物理端口号，如下图所示:SvitchBshow int port-channel 1Port-dianneil is up, line protoco1 is upHardware is EtherChannel, address is c003,OaeO(bia c003.OaeO.f102)MTU 1500 bytes, BU 300000 Kbit, DLY 1000 usee,reliatoility 2S5/2S5, txlcad 1/2S5

37、, rxload 1/255Eneapsnlat:ion ARPAr loopback ruot setKeepalive set (10 sec)Fui1-duplex, lOOMb/sHembets in this channe1; Fal/2 Fal/3ARP type: ARPA, ARP Timeout 04:00:00LasL- i nput 00 ; 00 ; 007 out put; neer f output h&ng neve 匚Last clearing of nshov int-erfacer, counters neverInput que ue : 0/ 7

38、S/ 0/ 0 (size/max/drops/f lushes ; Total our pur cirops: 0Queueing strategy: £i£oOutput queu皀：0/40 (slEe/tiiaxJ5 minu-ce inpu rate D bits/aec, D pacRets/aec5 minute output rate 0 bits/sec, 0 packets/sec0 p cKets input r 0 layt-es f 0 no bufferReceived 0 broadcasts, 0 runt-sf 0 giants, 0 th

39、rottles0 Input errors, 0 C口匚0 framer 0 ovetrun, 0 iruored0 input packets with driloble condition dete匚tmd0 packets output, C toytes, 0 underruns0 output errors, D collisions 1 interface resets匚 I ki 說_ ：，_ 二 “ l： _ 丄 2 J二亠 _ 丄 _b_ 工L 1.步骤7通过VPCS虚拟机，为每个PC机配置IP地址虚拟机名IP地址子网掩码PC1192.168.2.1255.255.255.0

40、PC2192.168.2.2255.255.255.0UPCS19> 1UPCSriJ> ip 192.1&8.2.1PCI : 192.16S.21 255 2££.2名5.聊 upcsru> 2UPCSt2> ip 192168.22PC2 : 192.168.2.3 255.25S-2S5 . UiUPCS12J> save shian4- done步骤8.用Ping命令检查主机间的连通性，PC1和PC2可以互相ping通,显示如下图:UPCStl J> 2UPCSt21> plug 192.168,2.1 丄7216

41、8.2.1 icRp_seqwl 111=64 192.16S«2,1 icnp_seq=2 111 =64 丄92 16S .2 丄 icmp_3eq=3 111 =64 192-168-2-1 icnp_seq=4 111=64 192 _ 168 _2： _ 1 icmp_seq=5 111 =fi4tIRC r79-000 me tine 141 00眄 ms t ime =94-H00 mst ine =203.80101 ns t line =125.000 msUPCS L2J> 1192-168-2_2192-168-2-2192.168.2.21S2-168-

42、2.2工92.168.t.Zicnp_seq*l tt 1=64 icnp_seq«2 tt1»64 icmp_seqw3 111-64 icnpseq=4 111 =&4 icnp_seq=5 11J =6 4t line -=125.000 ms t imc lS?.000 m鼻 t irte -109.00fi ms t ine=125 0冈防 ms t ine=141-msUPCSriJ> ping 192.168-2.2计算机网络实验报告步骤9(1)选择断开链路 SwitchA ( F1/2) > SwitchB(F1/2)，保留链路 Swit

43、chA ( F1一> SwitchB(F1/3),测试PC1和PC2间的连通性；SwitchA(config)f1/2SwitchA(contig-if)shutdownSwitchA(con£ig-if)轉*Mar 1 00;52:57EC-S-UNBUNDLE: Interface Fal/2 left the port-channel Pol *Mar 1 00:52:58%DTPS-NONTRUNKPORTON: Port Fal/2 has become nan-trunk SiffitchA(config-if) #*Mar 1 00:52:59.455: %LIN

44、K-5-CHANGED: Interface FastE匸H已匸n已匸：L/Zchanged state to swlministrat. ive Ly down*Mar 1 00:53:00,455: %LIMEPROTO-5-VPDOW: Line protocol on Interface FastEthern 己匸1/2 changed 耳匸盘匸巳 to downPC1向PC2发送数据包，直到用Crtl+C来中断，如下图所示:WPCS21> 1192-168-2-2192.168.2.2192.168.2.2192.168-2-2 192 .lt8_2_2 192_lfc8_2_

45、2 192.lfc8.2-2 192.lfc8.2-2 192_lfc8_2_2icnp-seq-l imeouicmp_seq=2 icmp_se(i=3 icfnp_seq«4 icnp_seq«5 icmp_se(i"6 icnp_seq=7 icfip_seq=8 icrnf _seq=9tt1=64 time =219.000 timeout：tt1-64 t imc-109.000 timeouttt1»64 time"156.000 timeouttt1=64 time=109.000 timeoutms ms ms msIUPC

46、Sri> pin<j 192.168.2.2 -tE2icmp._seq=10192.1*18,2t.2icnp._seq=ll1.2icnp_seq=121922icnp_seq=13tt1=64 t ine =219-000 ns t imeouttt1=64 tine =94000 ms t ineout在发送第65个数据包(即icmp _ seq=65)的时候，重新连好链路 Switch A( F1/2)> Switch B(F1/2)，一段时间后链路状态恢复正常，如下图所示：Switch!(config-ifJ int f1/2SwitchA(config-if)n

47、o shutdownSwitchA(con±ig-if)肄*Mar 1 00:51;16.839: EC-5-BUNDLE: Interface Fal/2 joined pdrt-channel Pol*Mar 1 00:54:17 339; DTP-5-TRUTJKPORTON: Port Fal/2 has become dotlq trunk SwitchA(config-if)矜*Mar 1 00 : S4 :19.767 :irJEPROTO-S-UPDOW: Line protcco 1 on Interface FaatEthernetl/2, changed stn

48、te t口 up192.18-2,2icmpseq =8：2tt1=64tIme =±8Sms19216輕-2.2ic mp_seq-8：3imeou192.1&8.2.2i.c mp_sei3( =84tt 1-64t ime-141.000PIS1S2.168ic mp_se(j=85timeout192.16«_2.2icmp_seq"86ttl-64t ime =«78 _000 1mis192.1&6-2-2ic mp_seq=H7t; imeomt192 168icmp_seq=88tt 1=64t line =109000m

49、s192.1&8_2.2±cmp_seq=89ttl=64t ime -78 -000 inis192 -l&Sic mp_se(i=90tt 1=64t ime =78 .000 iims：192.166-2.2ic mp_seq-91ttl=64t ime -"172.000192.1&8-2-2icmpsetf =92tt 1=64t ime =171.00MIDS192 168Ic mp_se(i=93tt 1 =64time =78 *A00 l祁192.1G8.2.2ic mp_seq-94ttl=64t line =141.000ms1

50、92.18_2,2icnp_seq =95tt1=64tIme =94,008 inhs中山丸辱计算机网络实验报告(2)选择断开链路 SwitchA ( F1/3) > SwitchB(F1/3)，保留链路 SwitchA ( F1一> SwitchB(F1/2)应该会出现和上述类似的结果。SwitchA(config-if)#int f1/3SwitchA(config-if)shutdown SwitchA(config-if)#*Kar 1 00;57:06.127: EC-5-UNBUNDLE: Interface Fal/3 leit the port-channel P

51、ol Kar 1 00:57:064 527j DTP-5-NONTRUTJKPORTOM: Port Fal/3 has b皀匚oitie non-trunk SwitchA(config-if #*Har 1 DO ; 57: 08,071 ： LINK-S-CHANGEI): Interface FastEthernetl/3 f changed state to adiriinistrat ively down*Hai:1 00 ;57: 09.071; LINEPROTO-5-UPDOWN: Line protocol on Interface FascEthernmt 17 3 ,

52、 匚hetii口亡d stairs 七口 downtjPCSri> pins 192.ItS.2.2 -t192.168.2.2icmp_seq=2tt1=64 t ime =140-000 ns192.168.2.2icrnp_seq=3 timeout±92.168.2.2192.168.2.21?2.168.2.2icrtp_5eq-4 icnp_seq=5 icnp_seq=6tt 1=64 t ine=63.000 (nst line outCt 1=64 time=10?.000 ns192.168.2.2192.168.2.2l?2.ie8.2.2icnp_5eq=? icnp_seq=8 icnp_seq=9t imeout111=64 t ine-110-000 ns tineouticmp_Sfeq=l tineoutSwitc hA(conf ig-if)#no SwitchA(config-if)# *Har 1 00:59:56.343: Har 1 00:69:56.643: SvitchA(config-if) #frMar1 00:59:59.25