Re: [LARTC] Policy routing missing default table?

[Juri Haberland <haberland@altus.de>]

Adrian Chung wrote:
> 
> On Tue, Jun 05, 2001 at 02:04:01PM +0200, Juri Haberland wrote:
> > > I was under the impression that my 3 main tables should have been
> > > 'local', 'main', and 'default'.  'main' would contain routes to adjacent
> > > networks, and 'default' would contain default routes.  So I could have
> > > solved my problem by just creating a table with precidence in between
> > > main and default, and changed the default gateway for 192.62.100.0/24
> > > without changing network routes too.
> >
> > Well, according to the "Linux 2.4 Advanced Routing HOWTO" the default
> > table (or 253) should be empty and the default route should be in
> > 'main'.
> 
> Hmm, that's strange.  So in the situation I have, where the router is
> connected to 3 adjacent networks physically, and I only want to alter
> the default gateway for one subnet, without affecting the other local
> network routes, how would I do it?
> 
> I'm assuming that if I insert a table before 'main', as I currently
> do, I have to duplicate all the routes to other local networks.
> 
> If I add the table after 'main', the default route that's in main
> overrides whatever default route I would put in the new table.
> 
> Is this logic sensible?

I assume so. Actually I'm in a similar situation as you and I'm just
about using 'ip' to set up a default route for our backup internet link,
which has (for historical reasons) also a subnet with DMZ associated
with it.

Juri

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