PingingLab传世经典系列《CCNA完全配置宝典》-4.5 PPP Multilink

4.5 PPP Multilink
实验目的：
1、掌握PPP多链路捆绑的基本配置。
2、理解PPP多链路捆绑的功能。

实验拓扑：



实验步骤：1、依据图中拓扑，为R1和R2的各个串口部署PPP封装，配置如下：R1上R1(config)#int s0/0R1(config-if)#no shutdownR1(config-if)#encapsulation pppR1(config-if)#int s0/1R1(config-if)#no shutdownR1(config-if)#encapsulation pppR1(config-if)#exitR2上R2(config)#int s0/0R2(config-if)#no shutdownR2(config-if)#encapsulation pppR2(config-if)#int s0/1R2(config-if)#no shutdownR2(config-if)#encapsulation pppR2(config-if)#exit2、部署PPP捆绑，配置如下：R1上R1(config)#int s0/0R1(config-if)#ppp multilink[PL1]R1(config-if)#ppp multilink group 1[PL2]R1(config-if)#int s0/1R1(config-if)#ppp multilinkR1(config-if)#ppp multilink group 1R1(config-if)#exitR2上R2(config)#int s0/0R2(config-if)#ppp multilinkR2(config-if)#ppp multilink group 1R2(config-if)#int s0/1R2(config-if)#ppp multilinkR2(config-if)#ppp multilink group 1R2(config-if)#exit3、为逻辑捆绑口配置IP地址，如下：R1(config)#int multilink 1[PL3]R1(config-if)#ip add 12.1.1.1 255.255.255.0R1(config-if)#exitR2(config)#int multilink 1R2(config-if)#ip add 12.1.1.2 255.255.255.0R2(config-if)#exit4、测试PPP多链路捆绑，如下：①查看接口IP状态R1#show interfaces multilink 1Multilink1 is up, line protocol is up Hardware is multilink group interface Internet address is 12.1.1.1/24 MTU 1500 bytes, BW 3088 Kbit,[PL4]DLY 100000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, LCP Open, multilink Open Open: IPCP, CDPCP, loopback not set Keepalive set (10 sec) DTR is pulsed for 2 seconds on reset Last input 00:00:10, output never, output hang never Last clearing of "show interface" counters 00:10:04 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 32 packets input, 5126 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 32 packets output, 5496 bytes, 0 underruns 0 output errors, 0 collisions, 2 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions 可以看到，逻辑捆绑链路的带宽是原来Serial的2倍。②查看接口IP信息R1#show ip int briefInterface IP-Address OK? Method Status ProtocolSerial0/0 unassigned YES unset up up Serial0/1 unassigned YES unset up up Serial0/2 unassigned YES unset administratively down down Serial0/3 unassigned YES unset administratively down down Multilink1 12.1.1.1 YES manual up up③测试连通性R1#ping 12.1.1.2Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 12.1.1.2, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 16/33/48 ms 测试成功，说明通过部署PPP多链路捆绑，可以实现链路冗余和带宽聚合，此实验完成。[PL1]开启PPP多链路捆绑。
[PL2]将接口放入捆绑组，这里的group用于区分本地多个捆绑组，是本地标识。
[PL3]进入逻辑口，为其分配IP地址。
[PL4]Serial口为1544kbit,逻辑口刚好是其2倍。
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