Re: routing traffic over Multiple lines

[Rushdul Mannan <]

> >>>> Picture this: one hdsl line / one cable modem / one leased line , all from
> >>>> different providers can these be integrated ?
> 
> > Rushdul Mannan rm@localhost wrote:
> >> I would have thought running some route daemon and using equal weighted 
> >> statics would take you some way. A simple IGP w/max-path attribute 
> >> support would be another option.
> 
> This won't work unless you can get PI space, the source address has to be
> the same for each TCP session.

"draft thoughts" as the question didn't give much away :)

>
> 
> Tim Wolfe tim@localhost wrote:
> > Yes but this will only affect outbound traffic, which in most cases is a
> > very small amount of the traffic.  The trick is to balance the INCOMING
> > traffic, which would probably best accomplished with some sort of NAT setup. 
> > The trick would probably be to get your firewall/router to rewrite the
> > source of your packets such that they were round robinning to the IP's
> > assigned by the different providers.  I'd have to think about it a little
> > more, but it should be doable.
> 
> Another solution would be route different parts of the IPv4 address space
> over the different interfaces, with NAT this would produce the correct
> results but you lose some flexibility since you cannot switch a route to
> another interface because you'd change the source IP address of all TCP
> connections open at that point.
> 
> I'd suggest looking at the way your different ISP's and their respective
> transit providers are connected and collecting a bunch of static routes
> accordingly (i.e., route your employer over the leased line, AMS-IX
> traffic over the ADSL modem and the world over the cable modem - also
> looking at costs).

Thinking a little more into it, I believe Tim's suggestion above seems 
most appropriate ie. NAT box (Cisco or something similar) 
round robinning over various links (different IPs) and using outbound 
equal defaults.

Rush