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 s0/0
R1(config-if)#no shutdown
R1(config-if)#encapsulation ppp
R1(config-if)#int s0/1
R1(config-if)#no shutdown
R1(config-if)#encapsulation ppp
R1(config-if)#exit
R2上
R2(config)#int s0/0
R2(config-if)#no shutdown
R2(config-if)#encapsulation ppp
R2(config-if)#int s0/1
R2(config-if)#no shutdown
R2(config-if)#encapsulation ppp
R2(config-if)#exit
2、部署PPP捆绑,配置如下:
R1上
R1(config)#int s0/0
R1(config-if)#ppp multilink[PL1]
R1(config-if)#ppp multilink group 1[PL2]
R1(config-if)#int s0/1
R1(config-if)#ppp multilink
R1(config-if)#ppp multilink group 1
R1(config-if)#exit
R2上
R2(config)#int s0/0
R2(config-if)#ppp multilink
R2(config-if)#ppp multilink group 1
R2(config-if)#int s0/1
R2(config-if)#ppp multilink
R2(config-if)#ppp multilink group 1
R2(config-if)#exit
3、为逻辑捆绑口配置IP地址,如下:
R1(config)#int multilink 1[PL3]
R1(config-if)#ip add 12.1.1.1 255.255.255.0
R1(config-if)#exit
R2(config)#int multilink 1
R2(config-if)#ip add 12.1.1.2 255.255.255.0
R2(config-if)#exit
4、测试PPP多链路捆绑,如下:
①查看接口IP状态
R1#show interfaces multilink 1
Multilink1 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 brief
Interface IP-Address OK? Method Status Protocol
Serial0/0 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 up
③测试连通性
R1#ping 12.1.1.2
Type 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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