Re: [IPFIX] WGLC for draft-ietf-ipfix-protocol-rfc5101bis-03

Andrew Feren <[email protected]>
Newsgroups gmane.ietf.ipfix
Message-ID <[email protected]>
On 12/10/2012 09:59 AM, Paul Aitken wrote:
> draft-ietf-ipfix-protocol-rfc5101bis-03 Dear all,
>
> Here's a comprehensive review of draft-ietf-ipfix-protocol-rfc5101bis-03 :
>
>
>>   
>>
>>
>>
>> Network Working Group                                     B. Claise, Ed.
>> Internet Draft                                       Cisco Systems, Inc.
>> Obsoletes: 5101                                         B. Trammell, Ed.
>> Category: Standards Track                                     ETH Zurich
>> Expires: May 24, 2013                                  November 20, 2012
>>
>>
>>     Specification of the IP Flow Information eXport (IPFIX) Protocol
[ snip ]
>> 6.1.9  dateTimeMicroseconds
>>
>>     The data type dateTimeMicroseconds is a 64-bit field encoded
>>     according to the NTP Timestamp format as defined in section 6 of
>>     [RFC5905]. This field is made up of two unsigned 32-bit integers in
>>     network byte order, Seconds and Fraction. The Seconds field is the
>>     number of seconds since the NTP epoch, 1 January 1900 at 00:00 UTC.
>>     The Fraction field is the fractional number of seconds in units of
>>     1/(2^32) seconds (approximately 233 picoseconds). It can represent
>>     dates beginning between 1 January 1900 and 8 February 2036.
>
> Since we're already over 80% through that range, it seems worth moving 
> the epoch to 1/1/2000.
>

I don't disagree that this would have made sense, but can we reasonably 
make this change in 5101bis?  Will this make a 5101 collector 
incorrectly interpret 5101bis?  Maybe I am missing something.

-Andrew

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