[Cialug] Routes? Interfaces?

[Jeffrey Ollie]

On Fri, Feb 27, 2009 at 9:32 AM, Todd Walton <tdwalton at gmail.com> wrote:
> On Fri, Feb 27, 2009 at 9:24 AM, Nathan C. Smith <nathan.smith at ipmvs.com> wrote:
>> OSI Layers, interface is comprised of lower layers, route is at a higher layer.  In the Ethernet world, you can do
>> a lot with an interface before TCP/IP and routing gets involved.
>
> I see.  I was thinking a little more Linux specific, though.  When
> adminning a Linux machine, why is there a kernel routing table?  Why
> doesn't setting up an interface create an accompanying route and be
> done with it?

Assigning an IP address to an interface should set up a route to the
directly connected subnet.  Setting up a default route is done
separately because the default route isn't necessarily going to go
through the interface you just set up.

-- 
Jeff Ollie