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CCNP(BSCI)实验:配置EIGRP等价负载均衡扣非等价负载

运维开发网 https://www.qedev.com 2020-10-12 10:17 出处:51CTO 作者:starshomes
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

这个实验并不重要,但这个理念很好

R1、R2、R3预配置

R1(config)#int lo0

R1(config-if)#ip add 1.1.1.1 255.255.255.0

R1(config-if)#int s2/1

R1(config-if)#ip add 12.0.0.1 255.255.255.0

R1(config-if)#no sh

R1(config-if)#int f0/0

R1(config-if)#ip add 13.0.0.1 255.255.255.0

R1(config-if)#no sh

R2(config)#int lo0

R2(config-if)#ip add 2.2.2.2 255.255.255.0

R2(config-if)#int s2/1

R2(config-if)#ip ad 12.0.0.2 255.255.255.0

R2(config-if)#no sh

R2(config-if)#int s2/2

R2(config-if)#ip add 23.0.0.2 255.255.255.0

R2(config-if)#no sh

R3(config)#int lo0

R3(config-if)#ip add 3.3.3.3 255.255.255.0

R3(config-if)#int s2/1

R3(config-if)#ip add 23.0.0.3 255.255.255.0

R3(config-if)#no sh

R3(config-if)#int f0/0

R3(config-if)#ip add 13.0.0.3 255.255.255.0

R3(config-if)#no sh

R3(config-if)#


实验过程:

第一步:在各路由器上启用EIGRP

R1(config)#router eigrp 11

R1(config-router)#net 1.1.1.1

R1(config-router)#net 12.0.0.0

R1(config-router)#net 13.0.0.0

R1(config-router)#no au

R2(config)#router eigrp 11

R2(config-router)#net 2.2.2.2

R2(config-router)#net 12.0.0.0

R2(config-router)#net 23.0.0.0

R2(config-router)#no au

R3(config)#router eigrp 11

R3(config-router)#net 3.3.3.3

R3(config-router)#net 13.0.0.0

R3(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 subnets

D 12.0.0.0 [90/2172416] via 13.0.0.1, 00:01:11, FastEthernet0/0

13.0.0.0/24 is subnetted, 1 subnets

C 13.0.0.0 is directly connected, FastEthernet0/0

R3#sh ip eigrp topology

……………………

P 12.0.0.0/24, 1 successors, FD is 2172416

via 13.0.0.1 (2172416/2169856), FastEthernet0/0

via 23.0.0.2 (2681856/2169856), Serial2/1

P 13.0.0.0/24, 1 successors, FD is 28160

via Connected, FastEthernet0/0

P 23.0.0.0/24, 1 successors, FD is 2169856

via 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 f0/0

FastEthernet0/0 is up, line protocol is up

Hardware is DEC21140, address is ca93.0b98.0000 (bia ca93.0b98.0000)

Internet address is 13.0.0.3/24

MTU 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 s2/1

R3(config-if)#delay 10 (更改后,接口会down)

R3(config-if)#do sh int s2/1

Serial2/1 is up, line protocol is up

Hardware is M4T

Internet address is 23.0.0.3/24

MTU 1500 bytes, BW 1544 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation HDLC, crc 16, loopback not set

第三步:关闭cef并ping12.0.0.1

R3(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 ms

R3#

Nov 17 15:28:57.751: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3

Nov 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 13.0.0.3

Nov 17 15:28:57.823: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3

Nov 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 12.0.0.0

R3(config)#router eigrp 11

R3(config-router)#offset-list 10 in 509440 f0/0

R3(config-router)#exit

第二步:查看eigrp拓扑

R3#clear ip eigrp nei

R3#sh ip eigrp top

Codes: 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 156160

via 13.0.0.1 (156160/128256), FastEthernet0/0

P 2.2.2.0/24, 1 successors, FD is 2297856

via 23.0.0.2 (2297856/128256), Serial2/1

P 3.3.3.0/24, 1 successors, FD is 128256

via Connected, Loopback0

P 12.0.0.0/24, 2 successors, FD is 2681856

via 23.0.0.2 (2681856/2169856), Serial2/1

via 13.0.0.1 (2681856/2679296), FastEthernet0/0

P 13.0.0.0/24, 1 successors, FD is 28160

via Connected, FastEthernet0/0

P 23.0.0.0/24, 1 successors, FD is 2169856

via Connected, Serial2/1

R3#

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 ms

R3#s

Nov 17 15:50:28.151: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3

Nov 17 15:50:28.243: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3

Nov 17 15:50:28.271: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3

Nov 17 15:50:28.283: ICMP: echo reply rcvd, src 12.0.0.1, dst 23.0.0.3

Nov 17 15:50:28.295: ICMP: echo reply rcvd, src 12.0.0.1, dst 13.0.0.3

R3#

*


第三种:非等价负载

第一步:在R3上variance

R3#conf t

Enter configuration commands, one per line. End with CNTL/Z.

R3(config)#router eigrp 11

R3(config-router)#variance 2 (此值为 2681856÷2172416取大于此值的整数)

R3(config-router)#end

R3#sh ip rou

Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets

D 1.1.1.0 [90/156160] via 13.0.0.1, 00:00:04, FastEthernet0/0

2.0.0.0/24 is subnetted, 1 subnets

D 2.2.2.0 [90/2297856] via 23.0.0.2, 00:00:04, Serial2/1

3.0.0.0/24 is subnetted, 1 subnets

C 3.3.3.0 is directly connected, Loopback0

23.0.0.0/24 is subnetted, 1 subnets

C 23.0.0.0 is directly connected, Serial2/1

12.0.0.0/24 is subnetted, 1 subnets

D 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 subnets

C 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 2172416

via 13.0.0.1 (2172416/2169856), FastEthernet0/0

via 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 28160

via Connected, FastEthernet0/0

P 23.0.0.0/24, 1 successors, FD is 2169856

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