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Knowledge Base

Cannot establish PPPoE connection

Publication Date:  2018-06-22  |   Views:  1188  |   Downloads:  0  |   Author:  t84075118  |   Document ID:  EKB1001693393


Issue Description

Problem description: pppoe can't established pppoe can't established cannot establishing pppoe

Device: AR1200

Software version: V200R007C00SPC900

The AR1200 works as a pppoe client.

Alarm Information

Handling Process

1.       Requested the diagnostic-information, checked the configuration and did not notice any mistake, below the interested configuration:


acl number 2000 

 rule 5 permit source


interface GigabitEthernet0/0/9

 pppoe-client dial-bundle-number 1

 description Internet

 nat outbound 2000 interface Dialer 1



interface Dialer1

 link-protocol ppp

 ppp chap user xxxx

 ppp chap password cipher xxxx

 ip address ppp-negotiate

 dialer user Ecoconnect

 dialer bundle 1

 dialer-group 1

 nat outbound 2000


2.       Used debugging to check why the pppoe does not establish.

a.    debugg ppp al interface  Dialer  1

b.    debugg pppoe-client all


From the debug information we noticed the following packet/event:

We checked configuration again and noticed that it was configured for chap authentication only:


ppp chap user xxx

 ppp chap password cipher xx

Root Cause

The PPPoe server was accepting only pap packets for authentication.


Add the pap user for authentication:


[Huawei-Dialer1] ppp pap local-user xx password cipher xyz


[Huawei-Dialer1]undo shutdown