[comp.sys.next] PPP

bob@MorningStar.Com (Bob Sutterfield) (11/20/90)

In article <25467@uflorida.cis.ufl.EDU> mfi@serc.cis.ufl.edu (Mark Interrante) writes:
   In article <BOB.90Nov15104659@volitans.MorningStar.Com> bob@MorningStar.Com (Bob Sutterfield) writes:
      In article <ANDERSON.90Nov13195236@sapir.cog.jhu.edu> anderson@sapir.cog.jhu.edu (Stephen R. Anderson) writes:
         Why no SLIP?
      
      Because SLIP (RFC1055/1144) has been obsoleted by PPP
      (RFC1171/1172),

   Is PPP compatable with SLIP...

No.  When I make waffles, I throw the first batch to the birds before
anyone else smells the cooking and comes down to the kitchen to see
how badly I've done with them.  The second batch of the morning is
invariably better, because I've got the mixtures and temperatures and
times figured out.  Most good software is written on the second or
third cut, and the prototypes relegated to fond memory.  SLIP was a
good experimental non-standard while the community found out what it
would need to know in establishing a real point-to-point IP standard.
PPP learns from lots of experience with SLIP, retains the useful
parts, and throws the rest out to the birds.

A clever enough and properly-configured machine can talk SLIP on one
interface and PPP on another, and can act as a router betwixt the two
(just as between any other IP transports).  But it can't talk PPP on a
port that's expecting to hear SLIP, nor vice versa.

   ...and what does it do better?

Hmmm, quickly scanning a copy of RFC1171...

"...Some additional issues addressed by this specification of PPP
include asynchronous (start/stop) and bit-oriented synchronous
encapsulation, network protocol multiplexing, link configuration, link
quality testing, error detection, and option negotiation for such
capabilities as network-layer address negotiation and data compression
negotiation."

Please read the Introduction of RFC1171, from which this was
excerpted.  No use posting it all here.

farber@grad2.cis.upenn.edu (David Farber) (11/20/90)

I personally recommend PPP over slip but I more recommend
something over what we essentially have now on the Next
which is nothing . Does anyone have or plan
to have a really usable slip or PPP soon?

Dave