Re: [Idr] RFC 4684 pedantry - routes with no Route Target

[Jeffrey Haas <[e-mail]>]

On Wed, May 21, 2014 at 06:40:53PM +0200, Robert Raszuk wrote:
> > Default RT-C effectively negates the usefulness of the feature.  I wouldn't
> > recommend this.
>
> It all depends how you implement your filters :)

I'm not clear how this could be the case, even at a protocol abstraction
level.  Since RT-C entries are effectively longest match on RT (although I
know there's a push to change that behavior as part of the IPv6 work), for
any set of RT-Cs including default, any route containing an RT will match
default.  You're thus not constraining much at all. 

Modulo policy limiting the distribution of default in your network, of
course.  But I'm talking about on a single router.

-- Jeff