The MPLS WG Archive

[David Charlap <david.charlap@marconi.com>]

Curtis Villamizar wrote:
> 
> TCP backs off very nicely when congestion occurs so long duration
> transfer get a little slow for a while (minutes, hours) and then go
> faster as load lessens.  A fair amount of traffic is still
> asynchronous bulk transfer (last I looked) and the majority (HTTP) is
> interactive bulk transfer and is not perceptibly impacted by mild
> congestion and only gets annoying when moderate congestion occurs.

And what does this have to do with how a transit router makes
reservations?

Once data enters a tunnel, it is supposed to be opaque to the routers
until it exits that tunnel.  The fact that it may be using a layer-4
protocol with congestino control does not mean a switch can ignore its
reservations.

-- David