how do you configure mlppp?
interface multilink 1 encapsulation ppp ppp multilink ip address ppp multilink group 1
interface serial 0/1 encapsulation ppp ppp multilink ppp multilink group 1 ppp authetication chap
what is the command for configuring ppp pap?
ppp authentication pap
ppp pap sent-username R1 password pass1
(username and pass must be configured on other router)