[openbeosnetteam] Re: PPP up/opened

> > 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).
> 
> My problem was that PPP can be in the started phase while the 
> interface is
> still down. This has no use. Why doesn't an up request start the 
> interface
> so that they can be combined into the same request?
> Why did they split that system into down&initial and down&started? 
> Maybe I
> will find out when I read everything two or three times?

It did have a use once. The idea was that the physical link could die 
when there was no network traffic, thereby saving on phone line usage, 
without requiring re-negotiation of the link when it came back. The 
idea was to make it be able to go up and down transparently, as the 
situation demanded.
-Nathan

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