In reply to Emmanuel Jacobs: >> I think at a fist stage the interface is up and able to negociate >> LCP (authentication) and NCP (IPCP) then it can eventually go >> opened when succesfully negotiated... > > Maybe I did reverse the correct use of "up" and "opened" in the > previous mail... :-) Exact, but that's the idea behind this two states of a ppp "interface" anyway: 1) it's first opened 2) link negociation protocols (LCP, NCP, and sub-protocols like CHAP lies there) 3) it's going up, eventually :-) 4) ppp frames are sent/received, until... 5) it's going down (and closed, obvioulsy). -Philippe.