Multiple routing tables in action...

[Julian Elischer]

Wilkinson, Alex wrote:
>     0n Sat, Apr 26, 2008 at 08:44:30AM -0700, Julian Elischer wrote: 
> 
>     >A little progress report
>     >From a recently installed (6.3) machine.... (plus patches)
> 
> Ok, being ignorant to this, possibly a silly question:
> 
>   Why would i want or need multiple routing tables ?

any time you wnat to base a route upon something other than just
the destination address.  It's basically called "Policy based
routing".


Trivial examples:
You have two ISPs and you want to send all SMTP via one link and
all other traffic via the other.

You have 3 ISPs and want all traffic from the accounting department
to go via a particular path (that is encrypted) but regular office
chatter to go via another.

I have other more complex examples in my work.

I'm sure others have more solid examples as well.

google for policy routing.