EIGRP非等价负载均衡
实验拓扑图：
实验过程
1.R1的预配置
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Router>en Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host R1 R1(config)#interface f0/0 R1(config-if)#no shut R1(config-if)#ip add 172.16.1.9 255.255.255.252 R1(config-if)#interface s2/0 R1(config-if)#no shut R1(config-if)#ip add 172.16.1.1 255.255.255.252 R1(config-if)#exit |
2.R2的预配置
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Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host R2 R2(config)#interface s2/0 R2(config-if)#no shut R2(config-if)#ip add 172.16.1.2 255.255.255.252 R2(config-if)#interface s2/1 R2(config-if)#no shut R2(config-if)#ip add 172.16.1.5 255.255.255.252 R2(config-if)#exit |
3.R3的预配置
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Router#config t Enter configuration commands, one per line. End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line console 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host R3 R3(config)#interface f0/0 R3(config-if)#no shut R3(config-if)#ip add 172.16.1.10 255.255.255.252 R3(config-if)#interface s2/1 R3(config-if)#no shut R3(config-if)#ip add 192.168.1.1 255.255.255.0 R3(config-if)#exit |
4.配置R1的EIGRP
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R1(config)#router eigrp 50 R1(config-router)#network 172.16.1.0 R1(config-router)#no auto R1(config-router)#end |
5.配置R2的EIGRP
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R2(config)#router eigrp 50 R2(config-router)#network 172.16.1.0 *Jan 5 21:41:19.059: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 50: Neighbor 172.16.1.1 (Serial2/0) is up: new adjacency R2(config-router)#no auto R2(config-router)#end |
6.配置R3的EIGRP
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R3(config)#router eigrp 50 R3(config-router)#network 172.16.1.0 *Jan 5 21:41:58.075: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 50: Neighbor 172.16.1.9 (FastEthernet0/0) is up: new adjacency *Jan 5 21:41:58.079: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 50: Neighbor 172.16.1.5 (Serial2/1) is up: new adjacency R3(config-router)#network 192.168.1.0 R3(config-router)#no auto R3(config-router)#end |
7.在R1上观察到192.168.1.0/24网段的路由
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R1#show ip route eigrp 172.16.0.0/30 is subnetted, 3 subnets D 172.16.1.4 [90/2172416] via 172.16.1.10, 00:04:31, FastEthernet0/0 D 192.168.1.0/24 [90/156160] via 172.16.1.10, 00:04:25, FastEthernet0/0 |
8.为了提高网络传输性能，需要同时使用下一跳为172.16.1.2的路由，即使用另外一条metric值不相等的路径做均衡负载。
9.如果需要使用另外一条路径，则需要确保R2成为R1到达192.168.1.0/24网络的可行后继(FS)，要想成为FS，则需要满足可行条件(FC)。
10.在R1上查看EIGRP的拓扑表，没有发现R2出现在R1的拓扑表中。
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R1#show ip eigrp to IP-EIGRP Topology Table for AS(50)/ID(172.16.1.9) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 192.168.1.0/24, 1 successors, FD is 156160 via 172.16.1.10 (156160/128256), FastEthernet0/0 P 172.16.1.8/30, 1 successors, FD is 28160 via Connected, FastEthernet0/0 P 172.16.1.4/30, 1 successors, FD is 2172416 via 172.16.1.10 (2172416/2169856), FastEthernet0/0 via 172.16.1.2 (2681856/2169856), Serial2/0 P 172.16.1.0/30, 1 successors, FD is 2169856 via Connected, Serial2/0 |
11.配置R2的EIGRP的度量，确保R2成为R1的可行后继者。
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R2#config t Enter configuration commands, one per line. End with CNTL/Z. R2(config)#interface s2/1 R2(config-if)#bandwidth 10000000 //修改带宽 R2(config-if)#delay 10 //修改延迟 R2(config-if)#exit |
12.再次查看R1的拓扑表
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R1#show ip eigrp to IP-EIGRP Topology Table for AS(50)/ID(172.16.1.9) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 192.168.1.0/24, 1 successors, FD is 156160 via 172.16.1.10 (156160/128256), FastEthernet0/0 via 172.16.1.2 (2300416/130816), Serial2/0 P 172.16.1.8/30, 1 successors, FD is 28160 via Connected, FastEthernet0/0 P 172.16.1.4/30, 2 successors, FD is 2172416 via 172.16.1.2 (2172416/2816), Serial2/0 via 172.16.1.10 (2172416/2169856), FastEthernet0/0 P 172.16.1.0/30, 1 successors, FD is 2169856 via Connected, Serial2/0 |
13.将R1的variance修改为19，然后查看路由表
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R1#config t Enter configuration commands, one per line. End with CNTL/Z. R1(config)#router eigrp 50 R1(config-router)#variance 19 R1(config-router)#end R1#show ip route eigrp 172.16.0.0/30 is subnetted, 3 subnets D 172.16.1.4 [90/2172416] via 172.16.1.10, 00:00:11, FastEthernet0/0 [90/2172416] via 172.16.1.2, 00:00:11, Serial2/0 //实现了非等价负载均衡 D 192.168.1.0/24 [90/156160] via 172.16.1.10, 00:00:11, FastEthernet0/0 [90/2300416] via 172.16.1.2, 00:00:11, Serial2/0 |
