先配接口
R1(config)#int f0/0
R1(config-if)#ip add 12.1.1.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#
*Mar 1 00:02:18.967: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 00:02:19.967: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R1(config-if)#
R1#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 12.1.1.1 YES manual up up
R1#ping 12.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.1.1.2, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 16/19/20 ms
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int f0/0
R2(config-if)#ip add 12.1.1.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#
*Mar 1 00:03:38.003: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 00:03:39.003: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R2(config-if)#exit
R2(config)#int f1/0
R2(config-if)#ip add 23.1.1.1 255.255.255.0
R2(config-if)#no sh
R2(config-if)#do s
*Mar 1 00:04:56.455: %LINK-3-UPDOWN: Interface FastEthernet1/0, changed state to up
*Mar 1 00:04:57.455: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0, changed state to up
R2(config-if)#exit
R2(config)#exit
R2#s
*Mar 1 00:05:04.815: %SYS-5-CONFIG_I: Configured from console by console
R2#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 12.1.1.2 YES manual up up
FastEthernet1/0 23.1.1.1 YES manual up up
R2#ping 12.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/20/28 ms
R2#ping 23.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/21/24 ms
R3(config)#int f1/0
R3(config-if)#ip add
R3(config-if)#ip address 23.1.1.2 255.255.255.0
R3(config-if)#no sh
R3(config-if)#^Z
R3#pi
*Mar 1 00:06:15.551: %SYS-5-CONFIG_I: Configured from console by console
R3#ping 2
*Mar 1 00:06:16.431: %LINK-3-UPDOWN: Interface FastEthernet1/0, changed state to up
*Mar 1 00:06:17.431: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0, changed state to up
R3#ping 23.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.1.1.1, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 20/21/24 ms
R3#
然后宣告EIGRP
R1(config)#router eigrp 100
R1(config-router)#net
R1(config-router)#network 12.1.1.1 0.0.0.0
R1(config-router)#no auto-summary
R1(config-router)#end
R2(config)#router eigrp 100
R2(config-router)#net
R2(config-router)#network 12.1.1.2 0.0.0.0
R2(config-router)#net
R2(config-router)#network
*Mar 1 00:11:55.879: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 12.1.1.1 (FastEthernet0/0) is up: new adjacency
R2(config-router)#network 23.1.1.1 0.0.0.0
R2(config-router)#no au
R2(config-router)#no auto-summary
R2(config-router)#
*Mar 1 00:12:21.943: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 12.1.1.1 (FastEthernet0/0) is down: summary configured
R2(config-router)#
*Mar 1 00:12:23.803: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 12.1.1.1 (FastEthernet0/0) is up: new adjacency
R2(config-router)#
R3(config)#router eigrp 100
R3(config-router)#net
R3(config-router)#network 23.1.1.2 0.0.0.0
R3(config-router)#no au
R3(config-router)#no auto-summary
R3(config-router)#
*Mar 1 00:16:19.751: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 23.1.1.1 (FastEthernet1/0) is up: new adjac ency
*Mar 1 00:16:20.251: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 23.1.1.1 (FastEthernet1/0) is down: summary configured
R3(config-router)#
*Mar 1 00:16:24.263: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 23.1.1.1 (FastEthernet1/0) is up: new adjacency
然后用R1 R3 互ping
R1#ping 23.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 23.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/37/48 ms
R1#
R3#ping
*Mar 1 00:17:53.979: %SYS-5-CONFIG_I: Configured from console by console
R3#ping 12.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 12.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/45/56 ms
看邻居状态
R2#sh ip eigrp neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 23.1.1.2 Fa1/0 12 00:04:23 1348 5000 0 3
0 12.1.1.1 Fa0/0 14 00:07:56 1 3000 0 6
R2#
R2#sh ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(23.1.1.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 12.1.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0
P 23.1.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet1/0
R2#
原文地址：http://blog.51cto.com/433266/2113174