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Preview: Cisco Router 2811 configuration with 2 ethernets

Cisco Router 2811 configuration with 2 ethernets



The actual number of IP addresses available is around 3.3 billion. With the huge growth in the Internet, there are simply not enough addresses available. This is where Network Address Translation (NAT) comes into play. It allows a single device to act as



Last Build Date: Sun, 22 Jan 2012 04:23:01 +0000

 


cisco router 2811 configuration with one serial and one ethernet card

Fri, 22 Aug 2008 07:20:00 +0000

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
(image)


Configure cisco Router 2811 and Configure Natting with Two ethernet ports

Mon, 14 Apr 2008 12:57:00 +0000

Configure cisco Router 2811 and Configure Natting with Two ethernet ports

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 FastEthernet0/0

hostname(config-if)#ip address 58.68.30.130 255.255.255.0

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 FastEthernet0/1
hostname(config-if)#ip address 192.168.0.2 255.255.255.0

This will be Ip series you can use in your network now

hostname(config-if)#ip nat inside
hostname(config-if)#duplex auto
hostname(config-if)#speed auto

hostname(config-if)control+Z - save configuration

hostname#wr - write the changes

step 5 :-

hostname#config t

hostname(config)#ip classless
hostname(config)#ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

hostname(config)#ip http server
hostname(config)#ip nat inside source list 1 interface FastEthernet0/0 overload
hostname(config)#access-list 1 permit 192.168.0.0 0.0.0.255

This last step is very important and while to get any error in above steps just ignore because some router come with this configuration already set

hostname(config)#control+Z
hostname#wr - save the changes

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


Thanks
Naveen
(image)

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