EIGRP非等价负载均衡

EIGRP非等价负载均衡

实验拓扑图：

 

实验过程

 

1.R1的预配置

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

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

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

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

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

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

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。

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。

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

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

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