静态路由：
R1(config)#ip route 172.16.2.0 255.255.255.0 192.168.12.2
R1(config)#ip route 172.16.2.0 255.255.255.0 fa0/1
R2(config)#ip route 172.16.1.0 255.255.255.0 192.168.12.1
R2(config)#ip route 172.16.1.0 255.255.255.0 fa0/1
浮动静态路由：
配置静态路由
R1(config)#ip route 172.16.2.0 255.255.255.0 192.168.12.2
R1(config)#ip route 172.16.2.0 255.255.255.0 192.168.120.2
R2(config)#ip route 172.16.1.0 255.255.255.0 192.168.12.1
R2(config)#ip route 172.16.1.0 255.255.255.0 192.168.120.1
修改管理距离
R1(config)#ip route 172.16.2.0 255.255.255.0 192.168.12.2 50
R1(config)#ip route 172.16.2.0 255.255.255.0 192.168.120.2 150
R2(config)#ip route 172.16.1.0 255.255.255.0 192.168.12.1 50
R2(config)#ip route 172.16.1.0 255.255.255.0 192.168.120.1 150
EIGRP配置：
基本配置：
R1(config)#router eigrp 100
R1(config-router)#no auto-summary
R1(config-router)#network 192.168.12.0
R1(config-router)#network 192.168.120.0
R1(config-router)#net 172.16.0.0 0.0.255.255
R2(config)#router eigrp 100
R2(config-router)#no auto-summary
R2(config-router)#net 192.168.12.0
R2(config-router)#net 192.168.120.0
R2(config-router)#net 192.168.230.0
R2(config-router)#net 192.168.23.0
R2(config-router)#net 192.168.2.0
R3(config)#router eigrp 100
R3(config-router)#no auto-summary
R3(config-router)#net 192.168.23.0
R3(config-router)#net 192.168.230.0
R3(config-router)#net 192.168.3.0
配置EIGRP 的自动汇总和手工汇总：
开启所有路由器的自动汇总
R1(config)#router eigrp 100
R1(config-router)#auto-summary
R2(config)#router eigrp 100
R2(config-router)#auto-summary
R3(config)#router eigrp 100
R3(config-router)#auto-summary
关闭自动汇总，并在R1上配置手工汇总
R1(config)#router eigrp 100
R1(config-router)#no auto-summary
R1(config)#inter range fa0/0-1
R1(config-if-range)#ip summary-address eigrp 100 172.16.0.0 255.255.252.0
R2(config)#router eigrp 100
R2(config-router)#no auto-summary
R3(config)#router eigrp 100
R3(config-router)#no auto-summary
配置EIGRP不等价负载均衡：
查看 Serial接口默认带宽
R2#show inter s0/3/0
Serial0/3/0 is up, line protocol is up (connected)
Hardware is HD64570
Internet address is 192.168.230.1/24
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
（省略部分输出）
Serial接口默认带宽
R2(config)#inter s0/3/0
R2(config-if)#bandwidth 1544
R3(config)#inter s0/3/0
R3(config-if)#bandwidth 1544
配置不等价负载均衡
R2(config)#router eigrp 100
R2(config-router)#variance 15
R3(config)#router eigrp 100
R3(config-router)#variance 15
OSPF配置：
配置单区域OSPF
R1(config)#router ospf 1
R1(config-router)#network 192.168.12.1 0.0.0.0 area 0
R1(config-router)#network 192.168.120.0 0.0.0.255 area 0
R1(config-router)#network 172.16.0.0 0.0.255.255 area 0
R2(config)#router ospf 1
R2(config-router)#router-id 10.2.2.2
R2(config-router)#network 192.168.12.2 0.0.0.0 area 0
R2(config-router)#network 192.168.120.2 0.0.0.0 area 0
R2(config-router)#network 192.168.23.1 0.0.0.0 area 0
R2(config-router)#network 192.168.230.1 0.0.0.0 area 0
R2(config-router)#network 192.168.2.1 0.0.0.0 area 0
R3(config)#router ospf 3
R3(config-router)#network 0.0.0.0 255.255.255.255 area 0
配置多区域OSPF
配置多区域OSPF
R1(config)#router ospf 1
R1(config-router)#network 192.168.12.1 0.0.0.0 area 0
R1(config-router)#network 192.168.120.1 0.0.0.0 area 0
R1(config-router)#net 172.16.0.0 0.0.3.255 area 1
R2(config)#router ospf 1
R2(config-router)#network 192.168.12.2 0.0.0.0 area 0
R2(config-router)#network 192.168.120.2 0.0.0.0 area 0
R2(config-router)#network 192.168.2.1 0.0.0.0 area 0
R2(config-router)#net 192.168.23.1 0.0.0.0 area 2
R2(config-router)#net 192.168.230.1 0.0.0.0 area 2
R3(config)#router ospf 1
R3(config-router)#network 192.168.23.2 0.0.0.0 area 2
R3(config-router)#network 192.168.230.2 0.0.0.0 area 2
R3(config-router)#network 192.168.3.1 0.0.0.0 area 2
配置OSPF 验证
配置明文验证
R1(config)#interface fa0/0
R1(config-if)#ip ospf authentication
R1(config-if)#ip ospf authentication-key ccna
R2(config)#interface fa0/0
R2(config-if)#ip ospf authentication
R3(config-if)#ip ospf authentication-key ccna
配置MD5验证
R2(config)#interface fa0/1
R2(config-if)#ip ospf authentication message-digest
R2(config-if)#ip ospf message-digest-key 1 md5 ccnp
R3(config)#inter fa0/1
R3(config-if)#ip ospf authentication message-digest
R3(config-if)#ip ospf message-digest-key 1 md5 ccnp
配置HSRP：
配置单组HSRP
R2(config)#interface fa0/0
R2(config-if)#standby 1 ip 192.168.1.254
R2(config-if)#standby 1 priority 110
R2(config-if)#standby 1 preempt
R3(config)#interface fa0/0
R3(config-if)#standby 1 ip 192.168.1.254
R2(config-if)#standby 1 priority 105
R3(config-if)#standby 1 preempt
R2(config)#interface fa0/0
R2(config-if)#standby 1 track s0/3/0
配置PPP 和验证：
配置PPP单向PAP验证
R1(config)#username ccna password ccna
R1(config)#username ccnp password ccnp
R1(config)#interface s0/0/0
R1(config-if)#encapsulation ppp
R1(config-if)#ppp authentication pap
R2(config)#interface s0/0/0
R2(config-if)#encapsulation ppp
R2(config-if)#ppp pap sent-username ccna password ccna
配置PAP双向验证
R2(config)#username ccna2 password ccna2
R2(config)#interface s0/0/0
R2(config-if)#ppp authentication pap
R1(config)#interface s0/0/0
R1(config-if)#ppp pap sent-username ccna2 password ccna2
配置CHAP单向验证
R2(config)#username R3 password cisco
R2(config)#interface s0/0/1
R2(config-if)#encapsulation ppp
R2(config-if)#ppp authentication chap
R3(config)#username R2 password cisco
R3(config)#interface s0/0/1
R3(config-if)#encapsulation ppp
配置CHAP双向验证
R3(config)#interface s0/0/1
R3(config-if)#ppp authentication chap