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RE: COPS-PR Questions



Title: test
Andreas,
 
To attempt to provide an answer to your first question below I will say that it can be done if you wish to implement it that way.  For example, for one request state you can send a DEC message with a Decision object which only contains one <PRID, EPD> binding.  However, the PEP would not be configured completely.  In order to switch instances of one class in a PIB it would probably be best to just send an unsolicited DEC to update the policy.
 
Tina
-----Original Message-----
From: Andreas Polyrakis [mailto:apolyr@cs.toronto.edu]
Sent: Monday, November 13, 2000 4:38 AM
To: rap@ops.ietf.org
Subject: COPS-PR Questions

Hi all,
 
I am pretty new at this list and I have a couple of questions concerning COPS-PR:
 
1) What I understand from reading the "Framework PIB" and the postings in this list, is that
    different request states can be used to create multiple copies of the PIB and switch quickly
    between them. Is there a way to do a similar thing with parts of the PIB (instead of the whole
    PIB)? For example, can I choose a branch of the tree and have multiple instances of this
    branch, with only one active? I suppose that the answer is no...
 
2) COPS-PR describes how to add or deprecate PRCs. SPPI also defines such operations.
    I understand that PIBs are defined in Internet-Drafts or vendor specifications, and the previous
    attempt to address the problem of the evolution of the PIBs. PIBs are not supposed to be
    defined (or altered) by network managers in order to adapt to their network needs, is that right?
 
3) Are there any implementations of any real PDPs (free or not)? Can I find somewhere any discussion
   about implementation issues of PDPs? I am not only talking about COPS/COPS-PR issues, I am
   interested in other issues, as well, such as how high-level policies are stored in the PDPs, how are
   conflicts detected and solved, how policies are distributed to the appropriate PDPs (if more than one is used)
   etc.
 
I hope these questions are not too naive.
 
Thank you very much for your time,
 
Andreas