IP feelings and experiences 21

1. How to configure single-arm routing

    

   First, the basic topology configuration

   A main router, two switches, two sets of test router, the router acts as a computer use test

   
2.  

   Second, configure the interface IP address

   R1 interface: [R1-GigabitEthernet0 / 0/1] ip address 10.0.2.2 255.255.255.0 

   R2 interface: [R2-GigabitEthernet0 / 0/2] ip address 10.0.3.2 255.255.255.0

   R3 interfaces: interface GigabitEthernet0 / 0/1

                                ip address 10.0.2.1 255.255.255.0 

                    interface GigabitEthernet0/0/2

                                ip address 10.0.3.1 255.255.255.0 

   

   
3.  

   Third, S2 is closed G0 / 0/4 interfaces and S1, S2 of the G0 / 0/09 Interface added VLAN3

   [S2]interface GigabitEthernet 0/0/4 

   [S2-GigabitEthernet0/0/4]shutdown 

   [S2]interface GigabitEthernet 0/0/9 

   [S2-GigabitEthernet0/0/9]port link-type access 

   [S2-GigabitEthernet0/0/9]port default vlan 3 

   [S1]interface GigabitEthernet 0/0/9 

   [S1-GigabitEthernet0/0/9]port link-type access 

   [S1-GigabitEthernet0/0/9]port default vlan 3 

   
4.  

   Four, S1, G0 / 0/4 TRUNK mode into the interface, allows VLAN2, VLAN3

   [S1]interface GigabitEthernet 0/0/4 

   [S1-GigabitEthernet0/0/4]port default vlan 1 

   [S1-GigabitEthernet0/0/4]port link-type trunk 

   [S1-GigabitEthernet0/0/4]port trunk allow-pass vlan 2 3 

   

   
5.  

   五、在R3上的G0/0/1接口上配置子接口，同时在子接口配置ip地址，把接口配置成Dot1q,终结以太网接子接口

   [R4]inter GigabitEthernet 0/0/1.2 

   [R4-GigabitEthernet0/0/1.2]control-vid 20 dot1q-termination 

   [R4-GigabitEthernet0/0/1.2]dot1q termination vid 2 

   [R4-GigabitEthernet0/0/1.2]arp broadcast enable 

   [R4-GigabitEthernet0/0/1.2]ip address 10.0.20.1 24 

   [R4-GigabitEthernet0/0/1.2]inter GigabitEthernet 0/0/1.3 

   [R4-GigabitEthernet0/0/1.3]control-vid 30 dot1q-termination 

   [R4-GigabitEthernet0/0/1.3]dot1q termination vid 3 

   [R4-GigabitEthernet0/0/1.3]arp broadcast enable 

   [R4-GigabitEthernet0/0/1.3]ip address 10.0.30.1 24

   

   
6.  

   六、更改R1、R2的IP地址和网关

   [R1]inter GigabitEthernet 0/0/1 

   [R1-GigabitEthernet0/0/1]ip address 10.0.20.2 24 

   [R1-GigabitEthernet0/0/1]quit 

   [R1]undo ip route-static 0.0.0.0 0 10.0.2.1 

   [R1]ip route-static 0.0.0.0 0 10.0.20.1 

   [R2]interface GigabitEthernet 0/0/2 

   [R2-GigabitEthernet0/0/2]ip address 10.0.30.2 24 

   [R2-GigabitEthernet0/0/2]quit 

   [R2]undo ip route-static 0.0.0.0 0 10.0.3.1 

   [R2]ip route-static 0.0.0.0 0 10.0.30.1

   

   
7.  

   Seven verify results

   [R1]ping -c 1 10.0.30.2 

   PING 10.0.30.2: 56 data bytes, press CTRL_C to break 

   Reply from 10.0.30.2: bytes=56 Sequence=1 ttl=254 time=3 ms 

   --- 10.0.30.2 ping statistics --- 

   1 packet(s) transmitted 

   1 packet(s) received 

   0.00% packet loss 

   round-trip min/avg/max = 3/3/3 ms