Subject: Re: patch rfc: source-address selection policy
To: None <tech-net@netbsd.org>
From: David Young <dyoung@pobox.com>
List: tech-net
Date: 09/21/2005 17:55:27
On Wed, Sep 21, 2005 at 09:06:50PM +0200, Pavel Cahyna wrote:
> On Tue, 20 Sep 2005 18:43:56 -0500, David Young wrote:
> 
> >   and destination have in common.  'same-category' assigns a score of 1
> >   if the source and destination belong to the same "category" of
> >   address, one of "link-local" (224/8, 169.254/16), RFC1918 (10/8,
> >   172.16/12, 192.168/16) or "global" (all others); otherwise,
> >   'same-category' assigns 0.  'preference' assigns a score equal to a
> >   source's preference
> 
> I don't think that the "same-category" policy is sensible in this form.
> Just as 10/8 addresses and global addresses are in different categories,
> you can also treat subsets of the RFC1918 space as different categories.
> Imagine, for example, a large intranet with 10/8 addresses having small
> 192.168/16 networks connected to it, whose addresses are not reachable
> from the intranet.

Pavel,

If the 192.168/16 networks are unreachable, I don't understand why it
matters which source address a host chooses.

Dave

-- 
David Young             OJC Technologies
dyoung@ojctech.com      Urbana, IL * (217) 278-3933