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Need a basic config for an 1841 to use ADSL?

whiteford
Level 1
Level 1

Has anyone managed to get an 1841 with the ADSL port to get on the Internet? I have connected but get no web pages.

Here are parts of the config I use:

ip dhcp pool client

import all

network 172.19.16.0 255.255.255.0

default-router 172.19.16.1

lease 0 2

interface ATM0

no ip address

no ip unreachables

no ip mroute-cache

atm vc-per-vp 64

no atm ilmi-keepalive

pvc 0/38

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

dsl operating-mode auto

cdp enable

interface FastEthernet0/0

ip address 172.19.16.1 255.255.255.0

no ip unreachables

ip nat inside

ip virtual-reassembly

hold-queue 100 out

interface Dialer1

ip address negotiated

no ip unreachables

ip nat outside

ip virtual-reassembly

encapsulation ppp

dialer pool 1

dialer-group 1

ppp authentication chap pap callin

ppp chap hostname 123456789@hg57.btclick.com

ppp chap password 0 123456789

ppp pap sent-username 123456789@hg57.btclick.com password 0 123456789

ppp ipcp dns request

ppp ipcp wins request

!

ip route 0.0.0.0 0.0.0.0 Dialer1

ip nat inside source list 102 interface Dialer1 overload

access-list 102 permit ip 172.19.16.0 0.0.0.255 any

dialer-list 1 protocol ip permit

8 Replies 8

Danilo Dy
VIP Alumni
VIP Alumni

Hi,

Try this link http://www.cisco.com/en/US/tech/tk175/tk15/tech_configuration_examples_list.html it has everything about ADSL whatever the router model you have.

Regards,

Dandy

Thanks!

What I did notice was though if I ping from the routers console say www.google.com it would resolve successfully. From a laptop it won't but will if I put the IP of google's website in. I thought the import all option in DHCP would get the user to use the ISP's DNS servers?

Hi,

In your laptop MS-DOS CLI, execute "ipconfig /all" and check if you have a DNS. If none, follow the guide to include the DNS in the DHCP.

Can you check also the output of "show ip dhcp import" from the router if it returns with a DNS entry?

Regards,

Dandy

did you solve this issue I have the same problem

Hi, how far have you got, mines all working. All I had to do was add an Internet DNS server IP in the DHCP part.

Can you PC get onto Google by the IP, 72.14.207.99?

If so then its a simple DNS issue mentioned above.

Please rate this post

Man the issue looks very similar but instead a DNS ip address I just put this command on my internal interface ip tcp adjust-mss 1452 and this command on my dialer interface mtu 1492, then everything works!

Great, where did you get those settings from? It worries me that never set these mtu settings, everything works, but I wonder if things would be better if I did?

See link bellow! this issue is common when you have dls to internet and nat configured

This is very good link

http://www.cisco.com/en/US/tech/tk175/tk15/technologies_configuration_example09186a008071a7c2.shtml

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