ADSL Setup

[sr2470182]

Hi All,

I have just configure an ADSL interface on a router to dynamically connect to BT network for internet connection.

Below is my running config:

!

interface ATM0/1/0

no ip address

no atm ilmi-keepalive

dsl operating-mode auto

pvc 0/38

dialer pool-member 1

protocol ppp dialer

!

!

!

interface Dialer1

description ADSL Interface

ip address DHCP

ip nat outside

ip virtual-reassembly

encapsulation ppp

dialer pool 1

ppp chap hostname xxxxxxxxxxxxxxx

ppp chap password xxxxxxxxxxx

ppp pap sent-username xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Question:

1. Please How do I configure my Dialer1 interface to automatically request a DNS from the BT network?

2. Which do I need to configure on my Dialer1 interface, is it "ip address DHCP" or "ip address negociated"

3. Do I need to configure an "ip nat pool"?

Cheers!

[Giuseppe Larosa]

Hello Law,

I think there is a little config mismatch in NAT

ip nat inside source list 100 interface Dialer1 overload

access-list 100 permit ip 192.168.0.0 0.0.0.255 any

but f0/0 uses

192.168.2.0/24

so nat is never triggered

you can check nat with

sh ip nat translations

sorry I didn't see before

Hope to help

Giuseppe

[sr2470182]

Thanks Giuseppe,

when I type in "sh ip nat translations", nothing is shown or displayed.

Though the router is not connected to the internet right now. I mean no adsl cable is connected to the interface.

What do you suggest the correct NAT statement should be If you feel there is a mismatch in the config?

Thanks

[lejoe.thomas · Accepted solution]

Hi Law,

Guiseppe, there is an access-list misconfiguration for NAT, the correct access-list would be

access-list 100 permit ip 192.168.0.0 0.0.255.255 any

This will permit all address from major networks to be NAtted to the public address.

192.168.1.0/24

192.168.2.0/24

192.168.3.0/24

192.168.4.0/24

192.168.5.0/24

Remember I gave you that access-list (currently in your config) previously as an example.

Also make sure you set your DNS server on the PC and give it a go.

HTH

Lejoe

[sr2470182]

Thank you all. I very much appreciate all your help.

I have now changed the list to

access-list 100 permit ip 192.168.0.0 0.0.255.255 any

I will give it a go and inform you what happen.

Regards to you all,

[lejoe.thomas]

No worries, It's been long as length of this thread would indicate that you've been running behind the problem. Hopefully this should resolve things 🙂

Please get back if you run into any problems.

Lejoe

[sr2470182]

I am now Up and Running!!!

Thank you all for your support.