<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 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</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=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>According to the man page for dhcrelay (version 4.1.0)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>-u [address%]ifname<o:p></o:p></p>
<p class=MsoNormal>
Specifies the ''upper'' network interface for DHCPv6 relay mode:<o:p></o:p></p>
<p class=MsoNormal>
the interface to which queries from clients and
other relay<o:p></o:p></p>
<p class=MsoNormal>
agents should be forwarded. At least one -u
option must be<o:p></o:p></p>
<p class=MsoNormal>
included in the command line when running in DHCPv6 mode. The<o:p></o:p></p>
<p class=MsoNormal>
interface name ifname is a mandatory parameter. The destination<o:p></o:p></p>
<p class=MsoNormal>
unicast or multicast address can be specified by address%; if<o:p></o:p></p>
<p class=MsoNormal>
not specified, the relay agent will
forward to the DHCPv6<o:p></o:p></p>
<p class=MsoNormal>
All_DHCP_Relay_Agents_and_Servers multicast address.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>If appears that relayed packets are routed normally by the
ip stack (i.e. the egress interface is determined solely by the destination
address) and do not necessarily egress through the specified interface. I am
using linux 2.6.21.7. Can someone please tell me what the purpose of the ifname
parameter is?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Ted Bradshaw<o:p></o:p></p>
</div>
</body>
</html>