[ resent to list, was sent from the wrong address -sd ] Charles Wyble wrote:
I'm working on a small experiment which utilizes multiple outbound links (in the experiments case multiple consumer 3G connections [to 2 Sprint/2 Verizon/1 AT&T], Time Warner Cable Modem and an SBC Global DSL connection.
What is the best way to do outbound traffic engineering? I would like to be able to determine the best path possible and send traffic out the appropriate link.
Not sure if this is useful, but I thought I'd contribute a point on the curve... from NANOG 9: http://www.academ.com/nanog/feb1997/multihoming.html Obquote: from Paul Vixie's presentation, from Stan Barber's notes, here is the "meat of the matter": _ _ _ _ _ _ _ Per-interface Default Route * BSD TCP binds outbound route to PCB on SYN-ACK * Our trick: remember the inbound interface identity from the SYN * Each interface has its own "default route" * For outbound TCP and all UDP, a normal default is also needed. _ _ _ _ _ _ _ Hope that helps... -Scott