DragonFly users List (threaded) for 2005-05
--- Joshua Coombs <jcoombs@xxxxxxx> wrote:
> > 3) MPPP has an archaic requirement that
> > arrive in order. This requires front end
> > similar to fragment processing, that is a
> > of memory, cpu cycles and results in slowed
> > connections, since all modern TCP stacks can
> > handle out of sequence packets.
> > 3) MPPP was designed for slow, dial-up lines
> > ISDN). Per packet load balancing gives better
> > performance in the real world, with lower CPU
> > usage.
> Actually, as a network engineer, there are
> times that guaranteed
> packet delivery order, across multiple 'bonded'
> links is a
> requirement. While base TCP may tolerate out
> of order delivery, there
> are apps that ride ontop of it that cannot,
> such as VoIP. MGCP
> sessions using G7.11 compression basically
> treat out of order packets
> as dropped packets.
> Per Packet it good, but its not always the
> right tool for the job.
As a "network engineer", you should know that the
internet in general doesn't guarantee in-order
packet delivery. So any application that doesn't
handle it is simply unreliable on the internet.
If an application requires in-order delivery, you
can direct the traffic to use a single link. But
you can't guarantee what happens once its out of
your network. So without a transport layer your
application is just a crapshoot.
You have all sorts of load-balancing going on
throughout the internet, and almost none of it
guarantees in-order delivery. So if you sabotage
your own link thinking that you're going to make
something work, then you just don't understand
the big picture.
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