The last point that Sriram made is important to the higher level discussion
of the problem.

Semantically what we are proposing is that a BGP speaker can ad a semantic
tag to a route that describes restrictions on the intent of the
authorization that is implicit in sending a peer a BGP route.

Note that the one tag we suggested was not "DOWN" or "CUSTOMER" it was the
intent that the sender expects that you will not redistribute this update
to transit providers.

"I am sending you this route, but I do not wish it propagated to your
providers"

So discussing the semantics of the tag: what that tag applies to (e.g.,
specific route, vs peering session), what the tags attempt to signal, what
the security properties of such a tag should be, and what policies might
one build using such tags ... is the important part.

The specific encoding proposed was the result of one attempt to think
through these issues ... but not all the thoughts made it into the draft.



dougm
-- 
DougM at Work
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