Basic Config help needed 1841 Router 2 ethernet

Hi, I am attempting to configure an 1841 with 2 Ethernet connections and am unable to get things working with a simple config.

My setup is :

External IP Ethernet 0 - Internal IP Ethernet 1 NAT 10.0.0.X/24

Below is the config can someone notice any mistakes?.

I'm trying to replace an Belkin router with the 1841

Any help would be appreciated



version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption


hostname 1841-Energy_centre





enable secret 5 $1$mDzN$iWCpz4fKcx5PIOf6pwgBs0

enable password 123tcp45


no aaa new-model

ip cef

! ! ! ! ! ! ! ! ! ! ! !

interface FastEthernet0/0

ip address 62.49.X.X

ip nat outside

ip virtual-reassembly

duplex auto

speed auto


interface FastEthernet0/1

ip address

ip nat inside

ip virtual-reassembly

speed auto


no mop enabled


ip route 62.49.X.X


no ip http server

no ip http secure-server

ip nat inside source list 15 interface FastEthernet0/0 overload


access-list 15 permit

! !


! !

line con 0

line aux 0

line vty 0 4

password XXXXX



scheduler allocate 20000 1000


Reply to
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Config is fine, no problems with it.

What type of device is the outside interface patching in to? If a cable modem you would need to power it off for about 2 minutes to clear it's MAC table, most only allow a single MAC and the Belkins may be cached in there.

What does a show interface say? Are they both up and up?

From the router itself can you ping your default gateway?

Reply to
Brian V

Hi thanks for the reply.

Its and ADSL modem so at the mo there is an ADSL modem device with external IP address- Ethernet - Belikin ethernet router with external IP (this works fine)

yes both interfaces were up and up, couldnt ping default gateway.

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