Routing question -- multiple gateway setup?

Ralph Doncaster ralph-Zd07PnzKK1IAvxtiuMwx3w at public.gmane.org
Sun Aug 22 22:07:00 UTC 2004


On Sun, 22 Aug 2004, James Knott wrote:

> Ralph Doncaster wrote:
> > It may also be necessary to rebuild the kernel.
> > CONFIG_IP_ROUTE_MULTIPATH
> >   Normally, the routing tables specify a single action to be taken in
> >   a deterministic manner for a given packet. If you say Y here
> >   however, it becomes possible to attach several actions to a packet
> >   pattern, in effect specifying several alternative paths to travel
> >   for those packets. The router considers all these paths to be of
> >   equal "cost" and chooses one of them in a non-deterministic fashion
> >   if a matching packet arrives.
> >
>
> Assuming you've got two ISPs connected and the packets are sent out via
> both, what address is specified for the source?  With TCP, you set up a
> socket consisting of address & port pairs.  How does having multiple
> ISPs affect that?

No problem, unless your ISP filters packets without your assigned IP
address as the source.
man 2 bind

-Ralph

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