PPP config certification error results in that 3G card can not be dialed successfully

Publication Date:  2012-09-17 Views:  212 Downloads:  0
Issue Description
The client use telecom EC169C 3G card and firewall USG2000 to dial, but can not achieve successfully. Check the related information, signal intensity:-70DB,and the 3G card can be identified.
Alarm Information
None
Handling Process
Deleted the command “ppp authentication-mode chap pap” marked with red.
Root Cause
Check the configure. The client configures using the way of dial-on-demand of dial interface, where:
interface Cellular5/0/0
link-protocol ppp
ppp authentication-mode chap pap
ppp chap user aaabbb
ppp chap password simple sinopec9
timer hold 32767
dialer enable-circular   
dialer circular-group 0
dialer timer autodial 10

#
interface Dialer0
link-protocol ppp
ppp authentication-mode chap pap       
ppp chap user aaabbb
ppp chap password simple sinopec9
ppp ipcp dns admit-any
ip address ppp-negotiate
dialer enable-circular
dialer-group 1
dialer number #777 autodial
The client has configured the identify pattern as certifying peer end, while it does not need to certify the carrier* in common, which leads to the problem.
Suggestions
Command “ppp authentication-mode chap pap” indicates that it needs to certify the identify pattern of the peer end, if it does not need to, this command is not necessary. 

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