RE: question about the COPS-PR "remove DEC"

["Iliff, Tina" <Tina.Iliff@WCOM.Com>]

Title: RE: question about the COPS-PR "remove DEC"

Sunjian,

To answer your questions:

1. I do not believe that a single DEC for a request for a DRQ can be used to remove more than one request state.  Also, the client-handle included in the DEC message is the client-handle specifying the request-state that the PDP wishes to be removed
2. Process B since a RPT MUST always be returned after any DEC message

Tina

-----Original Message-----
From:   sunjian [mailto:jians@huawei.com]
Sent:   Wednesday, November 01, 2000 10:56 AM
To:     rap@ops.ietf.org
Subject:        question about the COPS-PR "remove DEC"

Hi,
In COPS-PR draft it is descripted that:
============================================================
3.2. Decision (DEC)  PDP -> PEP

   The DEC message can also be used by the PDP to command the PEP to
   open a new Request State or Delete an existing Request-State as
   identified by the Client-Handle. To accomplish this, COPS-PR
   defines a new flag for the COPS Decision Flags object. The flag
   0x02 is to be used by COPS-PR client-types and is hereafter
   referred to as the "Request-State" flag. An Install decision
   (Decision Flags: Command-Code=Install) with the Request-State flag
   set in the COPS Decision Flags object will cause the PEP to issue
   a new Request with a new Client Handle or else specify the
   appropriate error in a COPS Report message. A Remove decision
   (Decision Flags: Command-Code=Remove) with the Request-State flag
   set in the COPS Decision Flags object will cause the PEP to send a
   COPS Delete Request State (DRQ) message for the Request-State
   identified by the Client Handle in the DEC message. Whenever the
   Request-State flag is set in the COPS Decision Flags object in the
   DEC message, no COPS Named Decision Data object can be included in
   the corresponding decision (as it serves no purpose for this
   decision flag).
==============================================================
The question is:

1."Delete an existing Request-State as identified by the Client-Handle."
     But I think the "remove DEC " can only delete the request session of
itself.
     If  the "remove DEC " can delete other request session, I'm not sure ,
as the description followed, whether there's place for the two
Client-handles(to identify its request session and the session it want to
delete) to exist at the same time.

    I think the description should be more detailed in this aspect whatever
the answer is.




2. Which one of the following is the process of  "remove DEC" message
exchanging ?
Process A:
PDP                                                         PEP
   |              remove DEC                             |
   |  ----------------------------------------->  |
   |               DRQ                                         |
   |   <----------------------------------------- |
   |               RPT                                         |
   |   <----------------------------------------- |




Process B:
PDP                                                         PEP
   |              remove DEC                             |
   |  ----------------------------------------->  |
   |               RPT                                         |
   |   <----------------------------------------- |
   |               DRQ                                        |
   |   <----------------------------------------- |

Process C:
PDP                                                         PEP
   |              remove DEC                             |
   |  ----------------------------------------->  |
   |               DRQ                                        |
   |   <----------------------------------------- |
   |                                                                |




Thank you very much!

Sunjian
jians@huawei.com