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From: yushang <yusunn@gmail.com>
To: ips@ietf.org
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Subject: [Ips] Data Segment Padding
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Hi , is it possible to send the middle part of a sequence of DATA-OUT with
data segment padding to 4 bytes boundary ? Many thanks.

--00504502bb37bca70c0475783f44
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Hi , is it possible to send the middle part of a sequence of DATA-OUT with data segment padding to 4 bytes boundary ? Many thanks.<br>

--00504502bb37bca70c0475783f44--

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From: <Black_David@emc.com>
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No, padding is not supported (e.g., breaks data digests).
=20
RFC 3720 has this to say in Section 10.7.7 which strongly
recommends 4-byte alignment of data segment boundaries:
The Data Segments of Data-In and Data-Out PDUs SHOULD be filled to the
integer number of 4 byte words (real payload) unless the F bit is set to
1.

Thanks,
--David

----------------------------------------------------
David L. Black, Distinguished Engineer
EMC Corporation, 176 South St., Hopkinton, MA  01748
+1 (508) 293-7953             FAX: +1 (508) 293-7786
black_david@emc.com        Mobile: +1 (978) 394-7754
----------------------------------------------------

________________________________

	From: ips-bounces@ietf.org [mailto:ips-bounces@ietf.org] On
Behalf Of yushang
	Sent: Thursday, October 08, 2009 11:34 PM
	To: ips@ietf.org
	Subject: [Ips] Data Segment Padding
=09
=09
	Hi , is it possible to send the middle part of a sequence of
DATA-OUT with data segment padding to 4 bytes boundary ? Many thanks.
=09


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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
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<BODY>
<DIV><SPAN class=3D905414106-09102009><FONT face=3D"Courier New" =
size=3D2>No, padding=20
is not supported&nbsp;(e.g., breaks data digests).</FONT></SPAN></DIV>
<DIV><SPAN class=3D905414106-09102009><FONT face=3D"Courier New"=20
size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D905414106-09102009><FONT face=3D"Courier New" =
size=3D2>RFC 3720 has=20
this to say in Section 10.7.7 which strongly</FONT></SPAN></DIV>
<DIV><SPAN class=3D905414106-09102009><FONT face=3D"Courier New" =
size=3D2>recommends=20
4-byte alignment of data segment boundaries:</FONT></SPAN></DIV>
<DIV><SPAN class=3D905414106-09102009><SPAN lang=3DEN>
<P>The Data Segments of Data-In and Data-Out PDUs SHOULD be filled =
to<SPAN=20
class=3D905414106-09102009> </SPAN>the integer number of 4 byte words =
(real=20
payload) unless the F bit is<SPAN class=3D905414106-09102009> </SPAN>set =
to 1<SPAN=20
class=3D905414106-09102009>.</SPAN></SPAN></SPAN><FONT size=3D2><!-- =
Converted from text/plain format --></P>
<P><FONT=20
size=3D2>Thanks,<BR>--David<BR><BR>--------------------------------------=
--------------<BR>David=20
L. Black, Distinguished Engineer<BR>EMC Corporation, 176 South St., =
Hopkinton,=20
MA&nbsp; 01748<BR>+1 (508)=20
293-7953&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;=20
FAX: +1 (508)=20
293-7786<BR>black_david@emc.com&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
=20
Mobile: +1 (978)=20
394-7754<BR>----------------------------------------------------</FONT></=
FONT></P></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px =
solid; MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
  <HR tabIndex=3D-1>
  <FONT face=3DTahoma size=3D2><B>From:</B> ips-bounces@ietf.org=20
  [mailto:ips-bounces@ietf.org] <B>On Behalf Of =
</B>yushang<BR><B>Sent:</B>=20
  Thursday, October 08, 2009 11:34 PM<BR><B>To:</B>=20
  ips@ietf.org<BR><B>Subject:</B> [Ips] Data Segment=20
Padding<BR></FONT><BR></DIV>
  <DIV></DIV>Hi , is it possible to send the middle part of a sequence =
of=20
  DATA-OUT with data segment padding to 4 bytes boundary ? Many=20
thanks.<BR></BLOCKQUOTE></BODY></HTML>

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