Is PPP negotiating properly?
If Layer 1 is up and you have the correct VPI/VCI, the next step is to make sure PPP comes up properly. In order to accomplish this, you need to run a series of debug commands on the Cisco DSL Router and interpret the output. The primary debug you use is debug ppp negotiation. This command output is an example of a successful PPP negotiation: Router#debug ppp negotiation PPP protocol negotiation debugging is on Router# 2w3d: Vi1 PPP: No remote authentication for call-out 2w3d: Vi1 PPP: Phase is ESTABLISHING 2w3d: Vi1 LCP: O CONFREQ [Open] id 146 len 10 2w3d: Vi1 LCP: MagicNumber 0x8CCF0E1E (0x05068CCF0E1E) 2w3d: Vi1 LCP: O CONFACK [Open] id 102 Len 15 2w3d: Vi1 LCP: AuthProto CHAP (0x0305C22305) 2w3d: Vi1 LCP: MagicNumber 0xD945AD0A (0x0506D945AD0A) 2w3d: Di1 IPCP: Remove route to 20.20.2.1 2w3d: Vi1 LCP: I CONFACK [ACKsent] id 146 Len 10 2w3d: Vi1 LCP: MagicNumber 0x8CCF0E1E (0x05068CCF0E1E) 2w3d: Vi1 LCP: State is Open 2w3d: Vi1 PPP: Phase is AUTHENTICATING, by the peer 2w3d: Vi1 CHA