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North American Network Operators Group

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Re: PPP over Ethernet?

  • From: Phillip Vandry
  • Date: Thu Jun 04 10:57:54 1998

> Nah, They never heard of virtual circuits.
> 
> Seriously, PPP over IP is a way of building a cheap VPN. The thing is that
> SSH already does that job much better.

The SSH FAQ or docs or whatever mentions that there is a big problem with
this type of tunelling: If TCP traffic goes through the tunnel and
congestion is encountered, both the TCP traffic being tunelled and the
tunnel itself (which is a TCP connection) will retransmit, causing, at
the very least, a waste of bandwidth. Maybe other kinds of havoc
could result from this?

That is why I thought protocols like GRE which encapsulate one packet in
one packet were much better.

-Phil




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