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RFC 5655, "Specification of the IP Flow Information Export (IPFIX) File Format", October 2009

Source of RFC: ipfix (ops)
See Also: RFC 5655 w/ inline errata

Errata ID: 4306
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Wayne Tackabury
Date Reported: 2015-03-19
Verifier Name: Benoit Claise
Date Verified: 2015-03-19

Section A.5 says:

   224: 0A 47 0A B6 E5 47 0C 07 48 00|01 03 00 18 00 3E
           [ message checksum record ^ -->
   240: 2B 37 08 CE B2 0E 30 11 32 12 4A 5F E3 AD DB 00

   256:|00 0A 05 10 47 0A B6 E5 00 00 00 06 00 00 00 01


It should say:

   224: 0A 47 0A B6 E5 47 0C 07 48 00|01 03 00 16 00 3E
           [ message checksum record ^ -->
   240: 2B 37 08 CE B2 0E 30 11 32 12 4A 5F E3 AD DB 00

   256:|00 0A 05 10 47 0A B6 E5 00 00 00 06 00 00 00 01


Notes:

First of all, note that per erratum #2030, the offsets in this whole section are wrong, it should begin (I think) at 192. I shall use the published (incorrect) offset for illuminating this point:

I believe the byte at #237 should be 0x16 and not 0x18. I suspect this checksum was copy-pasted from a prior instance in the example, where there were three pad bytes added to the data record for #259 (0x103). In this instance, there is only one pad byte at #255, hence the offset here should be two less (22 or 0x16 and not 24 or 0x18):

2 bytes set ID
2 bytes length
1 byte option data
16 bytes checksum data
1 byte pad (at #255)

...totalling 22. Thanks!

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