consistent policy != consistent announcements
vaf at valinor.barrnet.net
Fri Mar 14 03:13:42 UTC 1997
At 11:31 AM -0800 3/13/97, Vince Fuller wrote:
>Well, if that "candidate path" is, in fact, one of Randy's customer, then
>I would expect him to "cold-potato" route toward it. One would think that
>to be part of the service that his customer is purchasing.
I think that his internal routing policy and service to his customer is
really irrelevant to the question at hand, except insofar as its
side-effects affect you.
Yup, it isn't my business to care about his internal routing, just to insure
that he presents appropriate routing to me (i.e. I care about the functional
specification not the design details...)
I was merely speculating, perhaps incorrectly, on what might be going wrong
so that I don't see what I consider consistant routes.
Ah, I finally see the problem. In essence, Randy's (announcement) policy
assumes that a destination is either in the set of customer routes OR the
set of peer routes, but not both. But in this case we have a destination
which is in both. The side-effect ends up making you "cold-potato" route
to destinatons in the (customer + peer) intersection.
The question is, does it make sense for a destination to be considered to
be in both sets? If "peer" is supposed to mean "not-customer" then the
answer is probably no, there is (should be) no intersection between
"customer" and "not-customer".
See your objection above - I really don't care how the routes are handled
internally to Randy's net; I just want to see routes for the same prefixes
with equal preference (as path length, origin, etc.) at all interconnects.
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