CCNP之BSCI实验4：配置EIGRP默认路由
实验目的：掌握通过IP DEFAULT－NETWORK命令配置EIGRP默认网络
实验拓扑：如图
实验步骤：
1． 按图配置每台路由器的IP地址，且用PING命令检验互通性。
2． 用R3模拟一个外部网络
3． 在R1，R2配置EIGRP
4． 用SHOW IP EIGRP NEIGHBORS命令查看EIGRP邻居
5． 在R2上配置默认路由，用于到达外部网络，并测试能否PING通R3的直连路由
6． 用IP DEFAULT－NETWORK让R2自动的向内部通告默认路由
7． 查看R1路由表，且尝试访问外部网络
注：IP DEFAULT-NETWORK ,应该采用网络。如果使用无类网络，则会出现问题的。
r1(config)#int f0/0
r1(config-if)#ip add 172.16.1.1 255.255.255.0
r1(config-if)#no sh
r1(config-if)#
*Mar 1 00:04:22.071: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 00:04:23.071: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
r1(config-if)#exit
r1(config)#router eigrp 1
r1(config-router)#net 172.16.1.0
r1(config-router)#
*Mar 1 00:06:20.367: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.2 (FastEthernet0/0) is up: new adjacency
r1(config-router)#do sh ip eigrp nei用SHOW IP EIGRP NEIGHBORS命令查看EIGRP邻居
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.1.2 Fa0/0 14 00:00:23 1273 5000 0 3
r1(config-router)#do ping 192.168.1.1测试能否PING通R3的直连路由，不能PING能，内部的R1缺少到达192.168.1.1的路由，所以无法访问外网
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
r1(config-router)#
r1#
*Mar 1 00:09:03.507: %SYS-5-CONFIG_I: Configured from console by console
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
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, FastEthernet0/0
r1#sh ip route查看路由表
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 172.16.1.2 to network 202.192.22.0
D* 202.192.22.0/24 [90/2172416] via 172.16.1.2, 00:00:19, FastEthernet0/0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, FastEthernet0/0
r1#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/32/88 ms
r2(config)#int loo 1
r2(config-if)#ip add 1
*Mar 1 00:03:11.451: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
r2(config-if)#ip add 129.1.1.2 255.255.255.0
r2(config-if)#exit
r2(config)#int s1/0
r2(config-if)#clo r 64000
r2(config-if)#ip add 202.192.22.1 255.255.255.0
r2(config-if)#no sh
r2(config-if)#exit
r2(config)#int f
*Mar 1 00:03:49.831: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up
*Mar 1 00:03:50.831: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
r2(config)#int f0/0
r2(config-if)#ip add 172.16.1.2 255.255.255.0
r2(config-if)#no sh
r2(config-if)#
*Mar 1 00:04:04.231: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 00:04:05.231: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
r2(config-if)#exit
r2(config)#router eigrp 1
r2(config-router)#net 172.16.1.0
r2(config-router)#
*Mar 1 00:06:19.891: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.1.1 (FastEthernet0/0) is up: new adjacency
r2(config-router)#do sh ip eigrp nei
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.1.1 Fa0/0 14 00:00:38 59 354 0 3
r2(config-router)#exit
r2(config)#ip route 0.0.0.0 0.0.0.0 202.192.22.2
r2(config)#do ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/32/60 ms
r2(config)#do 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 202.192.22.2 to network 0.0.0.0
C 202.192.22.0/24 is directly connected, Serial1/0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, FastEthernet0/0
129.1.0.0/24 is subnetted, 1 subnets
C 129.1.1.0 is directly connected, Loopback1
S* 0.0.0.0/0 [1/0] via 202.192.22.2
r2(config)#router eigrp 1
r2(config-router)#net 202.192.22.0
r2(config-router)#exit
10． r2(config)#ip default-network 202.192.22.0用IP DEFAULT－NETWORK让R2自动的向内部通告默认路由
r2(config)#exit
r2#
*Mar 1 00:11:05.311: %SYS-5-CONFIG_I: Configured from console by console
r2#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 202.192.22.2 to network 0.0.0.0
C* 202.192.22.0/24 is directly connected, Serial1/0
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.16.0.0/16 is a summary, 00:00:29, Null0
C 172.16.1.0/24 is directly connected, FastEthernet0/0
129.1.0.0/24 is subnetted, 1 subnets
C 129.1.1.0 is directly connected, Loopback1
S* 0.0.0.0/0 [1/0] via 202.192.22.2
r3(config)#int loo 1
r3(config-if)#ip ad
*Mar 1 00:02:18.071: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
r3(config-if)#ip add 192.168.1.1 255.255.255.0
r3(config-if)#exit
r3(config)#iint s0/0
^
% Invalid input detected at '^' marker.
r3(config)#int s0/0
r3(config-if)#ip add 202.192.22.2 255.255.255.0
r3(config-if)#no sh
r3(config-if)#
*Mar 1 00:02:51.947: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
*Mar 1 00:02:52.947: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r3(config-if)#
*Mar 1 00:03:15.191: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down
r3(config-if)#
*Mar 1 00:03:55.175: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
r3(config-if)#exit
r3(config)#ip route 0.0.0.0 0.0.0.0 202.192.22.1
r3(config)#do 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 202.192.22.1 to network 0.0.0.0
C 202.192.22.0/24 is directly connected, Serial0/0
C 192.168.1.0/24 is directly connected, Loopback1
S* 0.0.0.0/0 [1/0] via 202.192.22.1
r3(config)#do ping 172.16.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
本文转自gauyanm 51CTO博客，原文链接：http://blog.51cto.com/gauyanm/287634，如需转载请自行联系原作者
