cisco router 2811 configuration with one serial and one ethernet card

Configure cisco Router 2811 and Configure Natting with one serial and one ethernet card


Here we are going to confgure cisco router 2811/2611 with the ISP connection and create natting .

telnet 192.168.0.1 (Router Ip)
Enter passwd - xyz

step 1 :-

hostname>en - enable to login to router configuration
passwd - abc

hostname# sh run - to see running configuration

hostname# config t - To configure terminal

step 2 :-

hostname(config)#ip name-server 203.148.202.3
hostname(config)#ip name-server 203.148.202.4

where 203.148.202.3 and 203.148.202.4 are all the available dns server ip

step 3 :-

hostname(config)#interface Serial0/0
hostname(config-if)#ip address 58.68.30.130 255.255.255.0
hostname(config-if)# ip nat outside
hostname(config-if)#CLTR=Z
hostname#wr

hostname#config t
hostname(config)# ip nat pool sunny 125.16.1.20 125.16.1.20 prefix-length 24

hostname(config)# ip nat inside source list 7 pool sunny overload
hostname(config)# ip classless
hostname(config)# ip route 0.0.0.0 0.0.0.0 Serial0/0

hostname(config)#ip route 0.0.0.0 0.0.0.0 Serial0/1

hostnmae(config)# ip http server

hostname(config)#access-list 7 permit 192.168.100.0 0.0.0.255


Wan Ip 58.68.30.130 is the public Ip provided by the ISP and this ip will be natted with your complete network.I mean your network will have 192.168.0.1,2,3 series but outside this will be your main nattimg IP

hostname(config-if)ip nat outside
hostname(config-if)duplex auto
hostname(config-if)speed auto
hostname(config-if)control+Z - save configuration
hostname#wr - write the changes

step 4 :-

hostname#config t
hostname(config)# interface FastEthernet0/0
hostname(config-if)#ip address 192.168.0.20 255.255.255.0 secondary
hostname(config-if)# ip address 125.16.1.17 255.255.255.240
hostname(config-if)# ip nat inside

press CLTR+Z and then write
This will be Ip series you can use in your network now
hostname(config-if)#speed auto
hostname(config-if)control+Z - save configuration
hostname#wr - write the changes

Restart the router 1 or 2 times and your router is ready configured and natting is also done

Thanks

Naveen