PDP interactions in multiple domains

[Kaustubh Phanse <kphanse@ee.vt.edu>]

Hi!

	Had a couple of queries in how things would work in multiple
policy domains, and whether any standardization was done or being done for
the same?

Consider the following scenario:
We have three network domains, each belonging to a different organization,
and each domain has its own PDP to dictate policy decisions. Now say these
organizations decide to connect these domains to form a virtual private
network (VPN), and would like to have "homogeneous" or "non-conflicting"
policies to manage the entire VPN. In such case, how do the PDPs interact
to achieve this? Do the PEPs in a domain need to be made aware of (or need
to connect) to PDP(s) from other domain(s)?...etc.

Section 4.3 in RFC 2753 mentions the following:
"The PDP may consult other PDPs, but the discussion of inter-PDP
communication and coordination is outside the scope of this document".

So, I was not sure, if any other standards documents deals with this, or
whether its more of an implementation issue??

Any comments/pointers in this matter are greatly appreaciated.

Thank you
regards
Kaustubh
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 Kaustubh S. Phanse					  kphanse@ee.vt.edu
 PhD student				       http://www.ee.vt.edu/~kphanse
 Alexandria Research Institute
 Electrical & Computer Engineering Department		               
 Virginia Polytechnic Institute & State University 
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