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Re: Last Call: <draft-ietf-behave-ipfix-nat-logging-06.txt> (IPFIX Information Elements for logging NAT Events)

2016-02-16 10:12:32
Senthil,

[Senthil2] There is already an entry in IPFIX IANA registry for natEvent. There are 3 events (create/delete/pool exhausted) defined there. So I will add text to point to IPFIX IANA registry. I assume I have to add the additional events to the IANA considerations section of this draft to have IANA assign these. However, I am not clear how do I request these new values for
natEvent.  Is the following the right format to ask for the new values?
Name : natEvent

    Description: This Information Element identifies an Instance of the
    NAT that runs on a NAT middlebox function after the packet passed the
    Observation Point.

    Abstract Data Type: unsigned8

    Data Type Semantics: identifier
    Element ID : 230
    New values requested : The values 4-16 are requested as described in Table 
2.

    Reference:

    See RFC 3022 [RFC3022] for the definition of NAT.  See RFC
    3234 [RFC3234] for the definition of middleboxes.

For clarity, it might help to break your IANA Considerations into two sub-sections: New Information Elements, and Modified Information Elements. Obviously this one is the only entry in the latter section.

The description is wrong! Use the existing #230 description.

Please list the values from Table 2 here directly because this text will be extracted into IANA's registry, so it has to make sense stand-alone, outside of the RFC-to-be.

So you should also add "See [thisRFC] for the definitions of values 4-16." to the Reference section.

One concern I have is how to resolve the apparent conflict between the existing natEvent create/delete values which seem to be generic, and your proposed interpretations in Table 2 which are NAT44 specific. For backwards compatibility, it might be better to recognise that values 1 and 2 may have been used historically for any kind of NAT create/delete, and assign new values for the NAT44 and NAT64 specific events. You could even request that the old create and delete events now be considered as deprecated.

P.