EIGRP不等价负载均衡实验：
拓扑图：
R1到R2会走那条路呢，是直接到R2还是经过R3再到R2呢，应该是直接到R2，因为花费小
次优路径：R1到R2的下一跳是R3
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host R1
R1(config)#no ip do lo
R1(config)#line cons 0
R1(config-line)#no exec-t
R1(config-line)#logg sync
R1(config-line)#end
R1#conf t
R1(config)#int s1/1
R1(config-if)#ip add 10.1.1.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#int fa0/0
R1(config-if)#ip add 10.3.3.1 255.255.255.0
R1(config-if)#no sh
R1(config)#int lo 0
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#router ei 100
R1(config-router)#no auto
R1(config-router)#net 10.1.1.0 0.0.0.255 （eigrp的标准配置）
R1(config-router)#net 1.1.1.0 0.0.0.255
R1(config-router)#net 10.3.3.0 0.0.0.255
R1(config-router)#exi
*Sep 11 03:04:12.759: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 10.1.1.2 (Serial1/1) is up: new adjacency（邻居建立完毕）
R1(config-if)#
*Sep 11 03:08:27.067: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 10.3.3.2 (FastEthernet0/0) is up: new adjacency
查看路由表，在没做不等价负载均衡时，R1到R2的下一跳直接是R2
R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
2.0.0.0/24 is subnetted, 1 subnets
D 2.2.2.0 [90/2297856] via 10.1.1.2, 00:03:29, Serial1/1
3.0.0.0/24 is subnetted, 1 subnets
D 3.3.3.0 [90/156160] via 10.3.3.2, 00:03:25, FastEthernet0/0
10.0.0.0/24 is subnetted, 3 subnets
C 10.3.3.0 is directly connected, FastEthernet0/0
D 10.2.2.0 [90/2172416] via 10.3.3.2, 00:03:29, FastEthernet0/0
C 10.1.1.0 is directly connected, Serial1/1
做做不等价负载均衡，
R1(config)#router ei 100
R1(config-router)#v
R1(config-router)#variance 2
（2=2300416/2297856取整+1）
R1#show ip eigrp topology all-links
IP-EIGRP Topology Table for AS(100)/ID(10.3.3.1)
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 128256, serno 2
via Connected, Loopback0
P 2.2.2.0/24, 1 successors, FD is 2297856, serno 6
via 10.1.1.2 (2297856/128256), Serial1/1
via 10.3.3.2 (2300416/2297856), FastEthernet0/0
P 3.3.3.0/24, 1 successors, FD is 156160, serno 9
via 10.3.3.2 (156160/128256), FastEthernet0/0
via 10.1.1.2 (2809856/2297856), Serial1/1
P 10.2.2.0/24, 1 successors, FD is 2172416, serno 8
via 10.3.3.2 (2172416/2169856), FastEthernet0/0
via 10.1.1.2 (2681856/2169856), Serial1/1
P 10.1.1.0/24, 1 successors, FD is 2169856, serno 3
via Connected, Serial1/1
P 10.3.3.0/24, 1 successors, FD is 28160, serno 1
via Connected, FastEthernet0/0
在看路由表：
R1#sh ip route
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
2.0.0.0/24 is subnetted, 1 subnets
D 2.2.2.0 [90/2297856] via 10.1.1.2, 00:25:15, Serial1/1
3.0.0.0/24 is subnetted, 1 subnets
D 3.3.3.0 [90/156160] via 10.3.3.2, 00:25:15, FastEthernet0/0
10.0.0.0/24 is subnetted, 3 subnets
C 10.3.3.0 is directly connected, FastEthernet0/0
D 10.2.2.0 [90/2172416] via 10.3.3.2, 00:25:15, FastEthernet0/0
[90/2681856] via 10.1.1.2, 00:25:15, Serial1/1（多了一条）
C 10.1.1.0 is directly connected, Serial1/1
但是发现没有到达2.2.2.0的网络下一条还是只有一个，可在R3上修改延时来影响下一跳
先看原来的延时
R3#sh int s1/0
Serial1/0 is up, line protocol is up
Hardware is M4T
Internet address is 10.2.2.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, （2000×10）
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
Last input 00:00:03, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
886 packets input, 56360 bytes, 0 no buffer
Received 349 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
864 packets output, 54665 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up
修改：
R3(config)#int s1/0
R3(config-if)#delay 1999
再查看R1路由表
R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
2.0.0.0/24 is subnetted, 1 subnets
D 2.2.2.0 [90/2297856] via 10.1.1.2, 00:00:02, Serial1/1
[90/2300160] via 10.3.3.2, 00:00:02, FastEthernet0/0
（有了吧）
3.0.0.0/24 is subnetted, 1 subnets
D 3.3.3.0 [90/156160] via 10.3.3.2, 00:00:02, FastEthernet0/0
10.0.0.0/24 is subnetted, 3 subnets
C 10.3.3.0 is directly connected, FastEthernet0/0
D 10.2.2.0 [90/2172160] via 10.3.3.2, 00:00:02, FastEthernet0/0
[90/2681856] via 10.1.1.2, 00:00:02, Serial1/1
C 10.1.1.0 is directly connected, Serial1/1