<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:\AD74\B9BC;
panose-1:2 11 6 0 0 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:"\B9D1\C740 \ACE0\B515";
panose-1:2 11 5 3 2 0 0 2 0 4;}
@font-face
{font-family:\AD74\B9BC\CCB4;
panose-1:2 11 6 9 0 1 1 1 1 1;}
@font-face
{font-family:"\@\B9D1\C740 \ACE0\B515";
panose-1:2 11 5 3 2 0 0 2 0 4;}
@font-face
{font-family:"\@\AD74\B9BC";
panose-1:2 11 6 0 0 1 1 1 1 1;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
@font-face
{font-family:"\@\AD74\B9BC\CCB4";
panose-1:2 11 6 9 0 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
text-autospace:none;
word-break:break-hangul;
font-size:10.0pt;
font-family:"\B9D1\C740 \ACE0\B515";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:\AD74\B9BC;}
pre
{mso-style-priority:99;
mso-style-link:"\BBF8\B9AC \C11C\C2DD\C774 \C9C0\C815\B41C HTML Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:\AD74\B9BC\CCB4;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"\B9D1\C740 \ACE0\B515";
color:windowtext;}
span.HTMLChar
{mso-style-name:"\BBF8\B9AC \C11C\C2DD\C774 \C9C0\C815\B41C HTML Char";
mso-style-priority:99;
mso-style-link:"\BBF8\B9AC \C11C\C2DD\C774 \C9C0\C815\B41C HTML";
font-family:\AD74\B9BC\CCB4;}
span.pun
{mso-style-name:pun;}
span.pln
{mso-style-name:pln;}
span.typ
{mso-style-name:typ;}
span.lit
{mso-style-name:lit;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"\B9D1\C740 \ACE0\B515";}
/* Page Definitions */
@page WordSection1
{size:612.0pt 792.0pt;
margin:3.0cm 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=KO link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal align=left style='margin-bottom:10.5pt;text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#4B4B4B'>Hello, I tried to measure network performance BTW VM which connected through GRE tunnel. So, I configured neutron(ML2/GRE). <o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:10.5pt;text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#4B4B4B'>Then I verified TCP performance between VMs which are placed on same host. <o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:10.5pt;text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#4B4B4B'>But I could not make Iperf connection BTW VMs (on other host), but ping is ok.<o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:10.5pt;text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#4B4B4B'>bellow things are current Security group configuration. I think that I allow all traffic which is needed to execute iperf.<o:p></o:p></span></p><div style='mso-element:para-border-div;border:solid #888888 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt;background:whitesmoke'><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>+-------------+-----------+---------+-----------+--------------+</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'><o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> IP </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>Protocol</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>From</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>Port</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>To</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>Port</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> IP </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>Range</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>Source</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#660066;border:none windowtext 1.0pt;padding:0cm'>Group</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'><o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>+-------------+-----------+---------+-----------+--------------+</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'><o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> udp </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>1</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>65535</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0.0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>.</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0.0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>/</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'><o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> tcp </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>1</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>65535</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0.0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>.</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0.0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>/</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'><o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> icmp </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>-</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>1</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>-</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>1</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0.0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>.</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0.0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>/</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#006666;border:none windowtext 1.0pt;padding:0cm'>0</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>|</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:black;border:none windowtext 1.0pt;padding:0cm'><o:p></o:p></span></p><p class=MsoNormal align=left style='margin-bottom:13.5pt;text-align:left;line-height:13.5pt;background:whitesmoke;text-autospace:ideograph-numeric ideograph-other;border:none;padding:0cm'><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#666600;border:none windowtext 1.0pt;padding:0cm'>+-------------+-----------+---------+-----------+--------------+</span><span lang=EN-US style='font-size:9.0pt;font-family:"Courier New";color:#333333'><o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US>Do you have any comment?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>Taeheum Na<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>****************************************************<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>M.S. candidate of Networked Computing Systems Lab.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>School of Information and Communications<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>GIST (Gwangju Inst. of Sci. and Tech.)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>E-mail: <a href="mailto:thna@nm.gist.ac.kr"><span style='color:blue'>thna@nm.gist.ac.kr</span></a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>Phone: +82-10-2238-9424<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:Consolas;color:black'>Office: +82-62-715-2273</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>