internet access using Cisco 1841 router

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Sep 18th, 2007
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hi can any one please advice me how to configure a cisco 1841 router with ADSL port , i dont find any articles related to it,I have ADSL internet , can anyone please send me articles or advice regarding this, thanks in advance

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paolo bevilacqua Tue, 09/18/2007 - 01:49
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What encapsulation (PPPoA, PPPoE, rfc1483) is you ISP using ?

Whit this information one can point to a link with configuration examples.

shajil Tue, 09/18/2007 - 12:16
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thanks a lot for your reply

the encapsulation used is PPPoA,

any configuration examples also vl b of great help

paolo bevilacqua Tue, 09/18/2007 - 16:19
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Juste replace VPI/VCI and username/password as needed. Please rate post if useful!

ip dhcp pool lan





interface ATM0

no ip address

ip nat outside

ip virtual-reassembly

no atm ilmi-keepalive

pvc 8/35

encapsulation aal5mux ppp dialer

dialer pool-member 1


dsl operating-mode itu-dmt


interface Vlan1

ip address

ip pim sparse-dense-mode

ip nat inside

ip virtual-reassembly

ip tcp adjust-mss 1452


interface Dialer0

ip address negotiated

no ip unreachables

ip nat outside

ip virtual-reassembly

encapsulation ppp

dialer pool 1

no cdp enable

ppp authentication pap callin

ppp pap sent-username aliceadsl password 0 aliceadsl

ppp ipcp dns request

ppp ipcp route default


ip dns server

ip nat inside source list Nat-Control interface Dialer0 overload

ip access-list extended Nat-Control

permit ip any

shajil Tue, 09/18/2007 - 21:49
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thanks a lot for the quick reply,will go through the configuration and try it out,its great pleasure getting advice from cisco experts..

shajil Wed, 09/19/2007 - 00:04
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m went through the configuration,i jst cant apply the dialer pool-member 1 command under atm interface, SHALL I have to use transmit-interface dialer 1 instead?also is it not required to enable pppoe under atm,if so ,how shall i?please advice me

am sorry,am a little bit confused regarding the encapsulation used ,if its PPPoA or PPPoE,incase if its PPPoA ,i think its fine,can u explain the command "encapsulation aal5mux ppp dialer" under ATM interface

also am not able to create vlan interface using interface vlan1,shall i have to use Bridged virtual interface instead??


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