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Re: [RRG] APT security and other matters
Excerpts from Robin Whittle on Wed, Mar 12, 2008 11:44:00PM +1100:
> I note that APT places the ITR and ETR functions (typically in the
> same device) at a very specific location: the Provider Edge routers
> of ISPs. This contrasts with what Dino wrote a few days ago - that
> with LISP the ITR and ETR functions would be in Customer Edge
> For Loc/ID purposes (there are several other reasons to use
> LISP than what is intended by this venue), we want to strongly
> suggest that xTRs be placed on CE (CPE) routers. We think that
> is the best balance of tradeoffs.
> The Provider Edge location makes more sense to me. With Ivip, they
> can be placed anywhere, but the Provider Edge would be a good place.
In order for a site to be able to coordinate behavior of its xTRs, to
any degree and in any way it chooses, it is good to have them under
the site's direct control. I don't believe we can predict or should
control how a site's xTRs work together. I hope to be surprised at
sites' innovation. So it's good if we take that out of the realm of
inter-provider cooperation and put it under the site's control.
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