NAT issue on PPPoA

[Expereo International bv]

Hi,

I was configuring NAT onto the following interface (router Cisco 881)

interface Dialer0

ip address negotiated

ip mtu 1492

ip virtual-reassembly

encapsulation ppp

load-interval 30

dialer pool 1

dialer-group 1

but everytime i enter the "ip nat outside", the dialer0 no longer pingable. Anything missed? Seems that i only have this difficulties on PPPoA, but PPPoE works fine. I have tried all kind of NAT (static NAT, overload), and weren't working.

Below is the config of atm0 interface.

interface ATM0

no ip address

ip mtu 1492

no ip route-cache cef

no ip route-cache

load-interval 30

no atm ilmi-keepalive

pvc 0/50

  pppoe-client dial-pool-number 1

!

dsl operating-mode auto

end

Thanks in advance,

Benny

[johnlloyd_13]

hi benny,

for PPPoA, could you confirm with ISP PAP/CHAP info and then try to do the below:

int a0

encapsulation aal5mux ppp dialer

OR

encapsulation aal5snap

int d0

ip nat out

ppp authentication chap

ppp chap hostname

ppp chap password

OR

ppp authentication pap

ppp pap sent-username password