CCNP(BSCI)实验：配置EIGRP等价负载均衡扣非等价负载

CCNP(BSCI)实验：配置EIGRP等价负载均衡扣非等价负载

R2(config)#int lo0R2(config-if)#ip add 2.2.2.2 255.255.255.0R2(config-if)#int s2/1R2(config-if)#ip ad 12.0.0.2 255.255.255.0R2(config-if)#no shR2(config-if)#int s2/2R2(config-if)#ip add 23.0.0.2 255.255.255.0R2(config-if)#no sh

R3(config)#int lo0R3(config-if)#ip add 3.3.3.3 255.255.255.0R3(config-if)#int s2/1R3(config-if)#ip add 23.0.0.3 255.255.255.0R3(config-if)#no shR3(config-if)#int f0/0R3(config-if)#ip add 13.0.0.3 255.255.255.0R3(config-if)#no shR3(config-if)#

实验过程：第一步：在各路由器上启用EIGRPR1(config)#router eigrp 11R1(config-router)#net 1.1.1.1R1(config-router)#net 12.0.0.0 R1(config-router)#net 13.0.0.0R1(config-router)#no au

R2(config)#router eigrp 11R2(config-router)#net 2.2.2.2R2(config-router)#net 12.0.0.0R2(config-router)#net 23.0.0.0R2(config-router)#no au

R3(config)#router eigrp 11R3(config-router)#net 3.3.3.3R3(config-router)#net 13.0.0.0R3(config-router)#no au第二步：查看R3的路由表和拓朴表R3#sh ip rou……………………12.0.0.0/24 is subnetted, 1 subnetsD 12.0.0.0 [90/2172416] via 13.0.0.1, 00:01:11, FastEthernet0/013.0.0.0/24 is subnetted, 1 subnetsC 13.0.0.0 is directly connected, FastEthernet0/0

R3#sh ip eigrp topology ……………………P 12.0.0.0/24, 1 successors, FD is 2172416via 13.0.0.1 (2172416/2169856), FastEthernet0/0via 23.0.0.2 (2681856/2169856), Serial2/1P 13.0.0.0/24, 1 successors, FD is 28160via Connected, FastEthernet0/0P 23.0.0.0/24, 1 successors, FD is 2169856via Connected, Serial2/1

第一种：通过修改延迟来使之实现等价负载均衡第一步：查看R3上f0/0的延迟信息R3#sh int f0/0FastEthernet0/0 is up, line protocol is up Hardware is DEC21140, address is ca93.0b98.0000 (bia ca93.0b98.0000)Internet address is 13.0.0.3/24MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, reliability 255/255, txload 1/255, rxload 1/255……………………………………

第二步：修改S2/1的延迟并查看R3(config)#int s2/1R3(config-if)#delay 10 （更改后，接口会down）

R3(config-if)#do sh int s2/1Serial2/1 is up, line protocol is up Hardware is M4TInternet address is 23.0.0.3/24MTU 1500 bytes, BW 1544 Kbit, DLY 100 usec, reliability 255/255, txload 1/255, rxload 1/255Encapsulation HDLC, crc 16, loopback not set第三步：关闭cef并ping12.0.0.1R3(config)#no ip cef

*R3#p 12.0.0.1

Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 12.0.0.1, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 8/28/72 msR3#Nov 17 15:28:57.751: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3Nov 17 15:28:57.799: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3（不同的路径）Nov 17 15:28:57.815: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3Nov 17 15:28:57.823: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3Nov 17 15:28:57.839: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3*

第二种:通过offset-list来使之实现负载均衡第一步：做访问控制列表R3(config)#access-list 10 permit 12.0.0.0R3(config)#router eigrp 11R3(config-router)#offset-list 10 in 509440 f0/0R3(config-router)#exit第二步：查看eigrp拓扑R3#clear ip eigrp neiR3#sh ip eigrp topCodes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,r - reply Status, s - sia Status

P 1.1.1.0/24, 1 successors, FD is 156160via 13.0.0.1 (156160/128256), FastEthernet0/0P 2.2.2.0/24, 1 successors, FD is 2297856via 23.0.0.2 (2297856/128256), Serial2/1P 3.3.3.0/24, 1 successors, FD is 128256via Connected, Loopback0P 12.0.0.0/24, 2 successors, FD is 2681856via 23.0.0.2 (2681856/2169856), Serial2/1via 13.0.0.1 (2681856/2679296), FastEthernet0/0P 13.0.0.0/24, 1 successors, FD is 28160via Connected, FastEthernet0/0P 23.0.0.0/24, 1 successors, FD is 2169856via Connected, Serial2/1R3#

第三步：在R3 Ping 12.0.0.1并看看其结果R3#ping 12.0.0.1

Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 12.0.0.1, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 8/36/88 msR3#s Nov 17 15:50:28.151: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3Nov 17 15:50:28.243: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3Nov 17 15:50:28.271: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3Nov 17 15:50:28.283: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3Nov 17 15:50:28.295: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3R3#*

第三种：非等价负载第一步：在R3上varianceR3#conf tEnter configuration commands, one per line. End with CNTL/Z.R3(config)#router eigrp 11R3(config-router)#variance 2 （此值为 2681856÷2172416取大于此值的整数） R3(config-router)#endR3#sh ip rouGateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnetsD 1.1.1.0 [90/156160] via 13.0.0.1, 00:00:04, FastEthernet0/02.0.0.0/24 is subnetted, 1 subnetsD 2.2.2.0 [90/2297856] via 23.0.0.2, 00:00:04, Serial2/13.0.0.0/24 is subnetted, 1 subnetsC 3.3.3.0 is directly connected, Loopback023.0.0.0/24 is subnetted, 1 subnetsC 23.0.0.0 is directly connected, Serial2/112.0.0.0/24 is subnetted, 1 subnetsD 12.0.0.0 [90/2172416] via 13.0.0.1, 00:00:04, FastEthernet0/0[90/2681856] via 23.0.0.2, 00:00:04, Serial2/1//我们在这里看到有两条路由13.0.0.0/24 is subnetted, 1 subnetsC 13.0.0.0 is directly connected, FastEthernet0/0

为什么会有2条路由，我们查看eitgrp的拓扑表R3#sh ip eigrp topology ……………………P 12.0.0.0/24, 1 successors, FD is 2172416via 13.0.0.1 (2172416/2169856), FastEthernet0/0via 23.0.0.2 (2681856/2169856), Serial2/1可以看出非等价在这里体现出来了P 13.0.0.0/24, 1 successors, FD is 28160via Connected, FastEthernet0/0P 23.0.0.0/24, 1 successors, FD is 2169856

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