[e2e] traffic engineering considered harmful

[Jon Crowcroft]

In message <Roam.SIMC.2.0.6.992388675.32157.nordmark at bebop.france>, Erik Nordma
rk typed:

 >>In addition to Randy's point about navigation there is also
 >>the issue that exploring the available paths to find a good or better
 >>path isn't free - it requires sending some number of packets.
 >>And each host will do this exploration independently.

funny, isn that what TCP does on a single path right now
 
 >>I guess one could envision agents (e.g. in each site) that would do
 >>this type of exploration and be willing to share their information
 >>with hosts in the site. But that raises issues about stale information.

there are a lot more hosts than routers and a lot more flows than
routing neighbour state entries - ergo, we already haev a lot of this
data and we jjust need to think a bit better about coordinating it
 

 cheers

   jon