CCNP-1 EIGRP基本配置(BSCI)
CCNP1-EIGRP基本配置
实验拓扑：
实验要求：
1-R1
与
R2
起
EIGRP
；
2-
在
R1
上起
Loopback
，配置连续
IP
，观察
EIGRP
自动汇总，然后取消自动汇总，配置手动汇总，观察与自动汇总的区别；
3-
在
R2
上配置到
R3
上的静态路由，并使用缺省路由通告给
R1
，观察
R1
与
R2
的路由表变化；
试验目的：掌握
EIGRP
的基本配置。
试验配置：
R1
：
R1(config)#int s1/0
R1(config-if)#ip add 10.1.1 .1 255.255.255.0
R1(config-if)#no shu
R1(config-if)#exit
R1(config)#int loop0
R1(config-if)#ip add 199.99.1.1 255.255.255.0
R1(config-if)#exit
R1(config)#router eigrp 100
R1(config-router)#net 10.0.0 .0
R1(config-router)#net 199.99.1.0
R2
：
R2(config)#int s1/0
R2(config-if)#ip add 10.1.1 .2 255.255.255.0
R2(config-if)#clock rate 64000
R2(config-if)#no shu
R2(config-if)#exit
R2(config)#int s1/1
R2(config-if)#ip add 172.16.0.2 255.255.255.0
R2(config-if)#clock rate 64000
R2(config-if)#no shu
R2(config-if)#exit
R2(config)#router eigrp 100
R2(config-router)#net 10.0.0 .0
R2(config-router)#net 172.16.0.0
在
R1
与
R2
上
show ip route
察看路由表：
R1#show 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
D 172.16.0.0/16 [90/2681856] vi a 10.1.1 .2, 00:00:07, Serial1/0
C 199.99.1.0/24 is directly connected, Loopback0
10.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1 .0/24 is directly connected, Serial1/0
D 10.0.0 .0/8 is a summary, 00:00:12, Null0
R2#show 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
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/24 is directly connected, Serial1/1
D 172.16.0.0/16 is a summary, 00:00:03, Null0
D 199.99.1.0/24 [90/2297856] vi a 10.1.1 .1, 00:00:05, Serial1/0
10.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1 .0/24 is directly connected, Serial1/0
D 10.0.0 .0/8 is a summary, 00:00:03, Null0
可以看到收到了
EIGRP
的路由，
OK
，下面我们来比较自动汇总和手动汇总的区别：在
R1
上起
Loopback
接口测试：
R1(config)#int loop1
R1(config-if)#ip add 144.44.0.1 255.255.255.0
R1(config-if)#int loop2
R1(config-if)#ip add 144.44.1.1 255.255.255.0
R1(config-if)#int loop3
R1(config-if)#ip add 144.44.2.1 255.255.255.0
R1(config-if)#int loop4
R1(config-if)#ip add 144.44.3.1 255.255.255.0
R1(config-if)#exit
R1(config)#router eigrp 100
R1(config-router)#network 144.44.0.0 0.0.0 .255
R1(config-router)#network 144.44.1.0 0.0.0 .255
R1(config-router)#network 144.44.2.0 0.0.0 .255
R1(config-router)#network 144.44.3.0 0.0.0 .255
好，然后我们在
R2
上
show ip route
查看路由表：
R2#show 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
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/24 is directly connected, Serial1/1
D 172.16.0.0/16 is a summary, 00:00:40, Null0
D 144.44.0.0/16 [90/2297856] vi a 10.1.1 .1, 00:00:04, Serial1/0
D 199.99.1.0/24 [90/2297856] vi a 10.1.1 .1, 00:00:42, Serial1/0
10.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1 .0/24 is directly connected, Serial1/0
D 10.0.0 .0/8 is a summary, 00:00:40, Null0
EIGRP
自动汇总功能把
144
的路由自动汇总成一个
B
类网络，下面我们取消自动汇总：
R1(config-router)#no auto-summary
到
R2
上察看路由表，观察有什么变化？
R2#show 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
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/24 is directly connected, Serial1/1
D 172.16.0.0/16 is a summary, 00:00:43, Null0
144.44.0.0/24 is subnetted, 4 subnets
D 144.44.0.0 [90/2297856] vi a 10.1.1 .1, 00:00:00, Serial1/0
D 144.44.1.0 [90/2297856] vi a 10.1.1 .1, 00:00:00, Serial1/0
D 144.44.2.0 [90/2297856] vi a 10.1.1 .1, 00:00:00, Serial1/0
D 144.44.3.0 [90/2297856] vi a 10.1.1 .1, 00:00:00, Serial1/0
D 199.99.1.0/24 [90/2297856] vi a 10.1.1 .1, 00:00:44, Serial1/0
10.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1 .0/24 is directly connected, Serial1/0
D 10.0.0 .0/8 is a summary, 00:00:43, Null0
路由表中列出了
4
条到
144
网络的路由，下面再配置手动汇总，观察区别。
R1(config)#int s1/0
R1(config-if)#ip summary-address eigrp 100 144.44.0.0 255.255.252.0
再到
R2
上察看路由表，观察有什么变化？
R2#show 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
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/24 is directly connected, Serial1/1
D 172.16.0.0/16 is a summary, 00:00:50, Null0
144.44.0.0/22 is subnetted, 1 subnets
D 144.44.0.0 [90/2297856] vi a 10.1.1 .1, 00:00:00, Serial1/0
D 199.99.1.0/24 [90/2297856] vi a 10.1.1 .1, 00:00:52, Serial1/0
10.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1 .0/24 is directly connected, Serial1/0
D 10.0.0 .0/8 is a summary, 00:00:50, Null0
通告的掩码由原来自动汇总的
16
位，到没有汇总的
24
位，现在又到手动配置汇总的
22
位。这样可以大大减小路由标的大小，又可以配置一些不连续子网的汇聚（建议设计网络的时候都设计成连续的子网）。
路由器
R3
的配置如下：
R3(config)#int s1/0
R3(config-if)#ip add 172.16.0.1 255.255.255.0
R3(config-if)#no shu
R3(config-if)#exit
R3(config)#int loop0
R3(config-if)#ip add 172.16.1.1 255.255.255.0
R3(config-if)#int loop1
R3(config-if)#ip add 172.16.2.1 255.255.255.0
R3(config-if)#int loop2
R3(config-if)#ip add 172.16.3.1 255.255.255.0
R3(config-if)#exit
R3(config)#ip route 0.0.0 .0 0.0.0.0 172.16.0.2
然后在
R2
上添加下面的两条命令：
R2(config)#ip default-network 172.16.0.0
R2(config)#ip route 172.16.0.0 255.255.0.0 172.16.0.1
然后在
R2
上
show ip route
察看路由表：
R2#show 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 172.16.0.1 to network 172.16.0.0
* 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.0.0/24 is directly connected, Serial1/1
S* 172.16.0.0/16 [1/0] via 172.16.0.1
144.44.0.0/22 is subnetted, 1 subnets
D 144.44.0.0 [90/2297856] vi a 10.1.1 .1, 00:01:08, Serial1/0
D 199.99.1.0/24 [90/2297856] vi a 10.1.1 .1, 00:01:59, Serial1/0
10.0.0 .0/8 is variably subnetted, 2 subnets, 2 masks
C 10.1.1 .0/24 is directly connected, Serial1/0
D 10.0.0 .0/8 is a summary, 00:01:58, Null0
再到
R1
上察看一下路由表：
R1#show 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 10.1.1 .2 to network 172.16.0.0
D* 172.16.0.0/16 [90/2681856] vi a 10.1.1 .2, 00:00:04, Serial1/0
144.44.0.0/16 is variably subnetted, 5 subnets, 2 masks
C 144.44.0.0/24 is directly connected, Loopback1
D 144.44.0.0/22 is a summary, 00:01:07, Null0
C 144.44.1.0/24 is directly connected, Loopback2
C 144.44.2.0/24 is directly connected, Loopback3
C 144.44.3.0/24 is directly connected, Loopback4
C 199.99.1.0/24 is directly connected, Loopback0
10.0.0 .0/24 is subnetted, 1 subnets
C 10.1.1 .0 is directly connected, Serial1/0
看到了有个
D*
路由，说明
R1
通过
R2
学到一条到
172.16.0.0/16
的缺省路由，这样配置一般都是在
EIGRP
自治系统边界路由器上配置，为了向自治系统内通告一条缺省到自治系统外的路由。下面进行
ping
验证：
R1#ping 172.16.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 168/201/264 ms
R1#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 100 percent (5/5), round-trip min/avg/max = 168/239/288 ms
R1#
R1#ping 172.16.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 144/224/288 ms
都通了。
总结：通过实验掌握EIGRP
基本配置，以及EIGRP
自动汇聚与手动汇聚的区别，默认为自动汇聚，还掌握了ip default-network
命令的用法和配置方法。