[ANCP] Multicast Accounting

[Stefaan DE CNODDER <stefaan.de_cnodder at alcatel-lucent.be>]

Hi,

At the last IETF meeting, there was a discussion about multicast 
accounting is supposed to work.  Currently, the framework document 
mentions 2 options in section 3.4.3:

---
   o  The AN keeps track of when replication starts or stops, and
      generates the time and/or volume based accounting information per
      Access Loop and per multicast flow, before sending it to a central
      accounting system for logging.  Since the AN communicates with
      this accounting system directly, the approach doesn't require the
      use of ANCP.  It is therefore beyond the scope of this document;

   o  The AN keeps track of when replication starts or stops, and
      reports this information to the NAS for further processing.  In
      this case, ANCP can be used to send the information from the AN to
      the NAS.  This can be done with the Information Report message.
      The NAS can then generate the appropriate time and/or volume
      accounting information per Access Loop and per multicast flow, to
      be sent to the accounting system.  The ANCP requirements to
      support this approach are specified in this document.
---

Is everyone Ok with this?  Is more needed, or less, or more 
clarrification on what it means?

Personally, it looks Ok to me but I have a comment for extra 
clarrification on the first bullet: Does it require any impact on the 
ANCP protocol?  For the second bullet, I would expect that in a white 
list entry there is a flag indicating whether accounting is needed or 
not.  Is something similar needed to support the first bullet in a white 
list entry (e.g., need for time and/or volume based accounting with the 
IP address of acct server)?  Whatever is fine for me, but it has to be 
decided.

regards,
Stefaan



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