NO Internet access on LAN - Cisco 1941 Router

D.Ghanekar · ‎05-01-2014

I have a router in my company premises and i am getting problems to access internet on LAN. My router configuration is as follows:

router#show run
Building configuration...

Current configuration : 1249 bytes
!
! Last configuration change at 08:05:40 UTC Thu May 1 2014
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname router
!
boot-start-marker
boot-end-marker
!
!
enable secret 4 cMKf9AseOngX7qzV669VAP6mTP7Zx2CAoLvvkpbCO1E
!
no aaa new-model
memory-size iomem 25
!
ip cef
!
!
!
!
!
!
no ip domain lookup
no ipv6 cef
multilink bundle-name authenticated
!
!
!
license udi pid CISCO1941/K9 sn FGL1801222R
!
!
username admin privilege 15 secret 4 c5LFTnp3A5C3Ds2sCA3PU0Csl6Q1V1MpHyKNktEi5tI
!
!
!
!
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
ip address 192.168.100.8 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 10.10.10.1 255.255.255.0
duplex auto
speed auto
!
ip forward-protocol nd
!
ip http server
ip http authentication local
no ip http secure-server
!
ip route 10.10.10.0 255.255.255.0 GigabitEthernet0/0
!
!
!
!
control-plane
!
!
!
line con 0
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
login
transport input all
!
scheduler allocate 20000 1000
!
end

Please help ..... and suggest to change the configuration and please send the detailed steps to do.

Thanks

hdussa · ‎05-01-2014

Hi,

why do route ip route 10.10.10.0 255.255.255.0 to GigabitEthernet0/0 ?

usually a default route points to the internet.

ip route 0.0.0.0 0.0.0.0 <ip next hop>

Horst

D.Ghanekar · ‎05-01-2014

hi,,

thanks for reply...

I am a beginner in router configurations..... so please help me with the <ip next hope>..

I am trying to connect this router for testing in my office network.... My Office network is in 192.168.100.10-200 range and i given 192.168.100.8 to routers wan interface an i am trying the 192.168.100.7 as ip next hop...

Will this work ...

I can share you remote for the console of router...

hdussa · ‎05-01-2014

next hop = ip address of the internet router.

D.Ghanekar · ‎05-02-2014

hi,

i change the configurations as follows...

nterface GigabitEthernet0/0
ip address 192.168.100.8 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 10.10.10.1 255.255.255.0
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
!
ip forward-protocol nd
!
ip http server
ip http authentication local
no ip http secure-server
!
ip nat inside source list 10 interface GigabitEthernet0/1 overload
ip route 0.0.0.0 0.0.0.0 192.168.100.1
ip route 10.10.10.0 255.255.255.0 GigabitEthernet0/0
!
access-list 10 permit 192.168.100.0 0.0.0.255

with this i can ping the 4.2.2.2 and 8.8.8.8 and google.com IP 74.125.200.113 but on LAN interface i am unable to access the internet.

Please help.

Jon Marshall · ‎05-02-2014

The configuration is confusing.

You have a default route pointing to a 192.168.100.x IP and you say you can ping internet IPs from the router.

But then you have "ip nat inside" on the 192.168.100.x interface.

So -

1) what are your LAN IPs

2) what is the subnet used to connect to the internet ?

Jon

D.Ghanekar · ‎05-02-2014

Hi Jon..

Actually this device id of our customers and he has a lease line ... but he reported that they found this hardware faulty and thus we are testing it by configuring in our office premises.

In our office we have network in range 192.168.100.0/24 and thus we give the ip 192.168.100.8 to routers wan port. On routers LAN port we give the ip 10.10.10.1/24.

This is the scenario.....

Thanks