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Configuring Cisco 870 series router ATM Interface

Hi,

I have configured Cisco 870 router ATM interface with following configuration

interface  atm 0

ip address public ip 255.255.255.254

ip nat outside

pvc 0/38

   encapsulation aal5snap

no shutdown

But when I check ATM interface it is still down and line protocol is down.Please help how to make it up and up so that internet service could be used.Also I want to know that the provider has also given username and password for internet in their device.We want to replace that device with the router and facing problems.

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Configuring Cisco 870 series router ATM Interface

Since you need to define username and password, I assume this is a DSL link and not pure ATM.

Therefore you should change the configuration for PPPoA, for example:

interface atm0

no ip address

pvc 0/38  (VPI/VCI should be configured based on ISP requirements)

  encapsulation aal5mux ppp dialer

  dialer pool-member 1

interface dialer1

ip address

ip nat outside

encapsulation ppp

dialer pool 1

ppp chap hostname

ppp chap password

ppp pap sent-username password

Best regards

Marco

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