unidirectional ppp authentication on serial interface

From: Ovidiu Neghina (o.neghina@gmail.com)
Date: Sun Jun 17 2007 - 10:51:16 ART


Hi dear all.
I have R2----------R3 connected through a serial link. I want only R3 to
authenticate R2.

R3#sh run | i user
username R2 password 0 CISCO
R3#

R3#sh run int ser 0/2/1
Building configuration...

Current configuration : 123 bytes
!
interface Serial0/2/1
 ip address 10.0.0.3 255.0.0.0
 encapsulation ppp
 clock rate 2000000
 ppp authentication pap
end

R2#sh run int ser 0/1/1
Building configuration...

Current configuration : 153 bytes
!
interface Serial0/1/1
 ip address 10.0.0.2 255.0.0.0
 encapsulation ppp
 ppp authentication pap callin
 ppp pap sent-username R2 password 0 CISCO
end

It does not work. At debug ppp negotiation it says
R3#sh log | i PPP
*Jun 17 13:44:54.955: Se0/2/1 PPP: Authorization required
R3#
I have read
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_tech_note09186a0080093c6f.shtml
where unidirectional authentication is explained but over BRI interfaces...
I think unidirectional ppp authentication is only for dial enviroment and
will not work for this setup.

Could you confirm this please ?

best regards
Ovi



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