[Technical Errata Reported] RFC5225 (2703)

The following errata report has been submitted for RFC5225,
"RObust Header Compression Version 2 (ROHCv2): Profiles for RTP, UDP, IP, ESP and UDP-Lite".

--------------------------------------
You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=5225&eid=2703

--------------------------------------
Type: Technical
Reported by: Carl Knutsson <[email protected]>

Section: 6.6.11

Original Text
-------------
o  ip_id_behavior, one octet for each IP header in the compressible
   header chain starting from the outermost header.  Each octet
   consists of 2 bits padded with 6 MSBs of zeroes.

Corrected Text
--------------
o  ip_id_behavior_outer, one octet for each IPv4 header except the
   innermost in the compressible header chain starting from the outermost 
   header. Each octet consists of 2 bits padded with 6 MSBs of zeroes.

o  ip_id_behavior_innermost, one octet if the innermost header is an 
   IPv4 header. The octet consists of 2 bits padded with 6 MSBs of zeroes.

Notes
-----
There is no control field called ip_ip_behavior in the document. There are two control fields related to IP-ID behavior, ip_id_behavior_innermost and ip_id_behavior_outer. For IPv6, only the ip_id_behavior_innermost field exists and its value is always IP_ID_BEHAVIOR_RANDOM according to the FN. This makes it impossible to include ip_id_behavior_outer when calculating the crc for IPv6 headers. Furthermore, since the ip_id_behavior_innermost is constant it makes no sense to include it in the crc calculation.

Instructions:
-------------
This errata is currently posted as "Reported". If necessary, please
use "Reply All" to discuss whether it should be verified or
rejected. When a decision is reached, the verifying party (IESG)
can log in to change the status and edit the report, if necessary. 

--------------------------------------
RFC5225 (draft-ietf-rohc-rfc3095bis-rohcv2-profiles-06)
--------------------------------------
Title               : RObust Header Compression Version 2 (ROHCv2): Profiles for RTP, UDP, IP, ESP and UDP-Lite
Publication Date    : April 2008
Author(s)           : G. Pelletier, K. Sandlund
Category            : PROPOSED STANDARD
Source              : Robust Header Compression
Area                : Transport
Stream              : IETF
Verifying Party     : IESG