Cisco点滴――默认路由

默认路由（缺省路由）！呵呵，很多一听就会笑了，不就是全0嘛~~呵呵~~对啊~~很简单，仅供初学者或感兴趣者当个学习参考工具，其实网络也没有那么复杂~~很简单的哦~~
下面开始准备我们的拓扑实验架构~~

拓扑图：

 

拓扑连线
Router1 S0/0 <----> Router2 S0/0
Router1 F1/0 <----> VPCS V0/1
Router2 F1/0 <----> VPCS V0/2

路由优化指令：
alias exec a sh ip route
alias exec b sh ip inter b
no ip domain-lookup
line consloe 0
logging synchronous
exec-timeout 0 0
exit
路由R1配置：
Router(config)#hostname R1
R1(config)#interface serial 0/0
R1(config-if)#ip add 202.99.1.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#exit
//配置外网出口IP地址

R1(config)#interface fastEthernet 1/0
R1(config-if)#ip add 192.168.1.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#exit
//配置内网连接IP地址

R1(config)#ip route 0.0.0.0 0.0.0.0 s0/0
R1(config)#end
//配置静态路由

查看路由运行状态
R1#show running-config
Building configuration...

Current configuration : 1068 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
logging queue-limit 100
!
ip subnet-zero
!
!
no ip domain lookup
!
ip audit notify log
ip audit po max-events 100
mpls ldp logging neighbor-changes
!
!
!
!        
!
!
!
!
!
!
!
!
no voice hpi capture buffer
no voice hpi capture destination
!
!
mta receive maximum-recipients 0
!
!
!
!
interface Serial0/0
 ip address 202.99.1.1 255.255.255.0
 serial restart_delay 0
!
interface Serial0/1
 no ip address
 shutdown
 serial restart_delay 0
!
interface Serial0/2
 no ip address
 shutdown
 serial restart_delay 0
!
interface Serial0/3
 no ip address
 shutdown
 serial restart_delay 0
!
interface FastEthernet1/0
 ip address 192.168.1.1 255.255.255.0
 duplex auto
 speed auto
!
ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0/0
!
!
!
!
!
call rsvp-sync
!
!
mgcp profile default
!
!
!
dial-peer cor custom
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!        
end

路由R2配置：
Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#no ip do lo
Router(config)#hostname R2

R2(config)#interface serial 0/0
R2(config-if)#ip address 202.99.1.2 255.255.255.0
R2(config-if)#no shut
R2(config-if)#exit

R2(config)#interface fastEthernet 1/0
R2(config-if)#ip address 172.16.1.1 255.255.255.0
R2(config-if)#no shut
R2(config-if)#end

R2(config)#ip route 0.0.0.0 0.0.0.0 s0/0
R2(config)#end

路由运行状态

R2#show run
Building configuration...

Current configuration : 1023 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
logging queue-limit 100
!
ip subnet-zero
!
!
no ip domain lookup
!
ip audit notify log
ip audit po max-events 100
mpls ldp logging neighbor-changes
!
!
!
!        
!
!
!
!
!
!
!
!
no voice hpi capture buffer
no voice hpi capture destination
!
!
mta receive maximum-recipients 0
!
!
!
!
interface Serial0/0
 ip address 202.99.1.2 255.255.255.0
 serial restart_delay 0
!
interface Serial0/1
 no ip address
 shutdown
 serial restart_delay 0
!
interface Serial0/2
 no ip address
 shutdown
 serial restart_delay 0
!
interface Serial0/3
 no ip address
 shutdown
 serial restart_delay 0
!
interface FastEthernet1/0
 ip address 172.16.1.1 255.255.255.0
 duplex auto
 speed auto
!
ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0/0
!        
!
!
!
!
call rsvp-sync
!
!
mgcp profile default
!
!
!
dial-peer cor custom
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end      

路由连通性检测：

R1#ping 172.16.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/64/92 ms

R2#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/73/124 ms

===========================================================================================

VPCS 1 >ip 192.168.1.2 192.168.1.1
PC1 : 192.168.1.2 255.255.255.0 gateway 192.168.1.1

VPCS 1 >2
VPCS 2 >ip 172.16.1.2 172.16.1.1
PC2 : 172.16.1.2 255.255.255.0 gateway 172.16.1.1

VPCS 2 >show

NAME   IP/CIDR              GATEWAY           LPORT   RPORT
PC1    192.168.1.2/24       192.168.1.1       10001   11110
PC2    172.16.1.2/24        172.16.1.1        10002   11210
PC3    0.0.0.0/0            0.0.0.0           10003   30002
PC4    0.0.0.0/0            0.0.0.0           10004   30003
PC5    0.0.0.0/0            0.0.0.0           10005   30004
PC6    0.0.0.0/0            0.0.0.0           10006   30005
PC7    0.0.0.0/0            0.0.0.0           10007   30006
PC8    0.0.0.0/0            0.0.0.0           10008   30007
PC9    0.0.0.0/0            0.0.0.0           10009   30008

VPCS 1 >ping 172.16.1.2
172.16.1.2 icmp_seq=1 time=94.000 ms
172.16.1.2 icmp_seq=2 time=188.000 ms
172.16.1.2 icmp_seq=3 time=110.000 ms
172.16.1.2 icmp_seq=4 time=94.000 ms
172.16.1.2 icmp_seq=5 time=94.000 ms

VPCS 1 >2
VPCS 2 >ping 192.168.1.2
192.168.1.2 icmp_seq=1 time=94.000 ms
192.168.1.2 icmp_seq=2 time=125.000 ms
192.168.1.2 icmp_seq=3 time=125.000 ms
192.168.1.2 icmp_seq=4 time=156.000 ms
192.168.1.2 icmp_seq=5 time=110.000 ms
==================================================================================

OK，至此结束，怎么样，很简单吧，(*^__^*) 嘻，这个就算是先热热身，哈~~后面咱再做点有技术含量的，见笑了~~(*^__^*) 嘻…

本文出自 “龙目小子，博闻天下” 博客，谢绝转载！