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Hi guys,<br>
<br>
Finally got some time to look into it. <br>
<br>
Long story short, this smells like infrastructure problem.<br>
SARR passes over 546/547 port pair. That is between UEFI PXE client
and DHCP server (even if it is the same machine).<br>
The next packet is essentially a Boot Server choice step. UEFI PXE
client sends a unicast discovery packet towards Boot server (same
machine, same address) coded as DHCP Request.<br>
The release packet is a direct reaction to 3 second timeout (see
time diff between packet 9 and 11).<br>
<br>
See section 2.2.1 in PXE spec:
<a class="moz-txt-link-freetext" href="http://www.pix.net/software/pxeboot/archive/pxespec.pdf">http://www.pix.net/software/pxeboot/archive/pxespec.pdf</a><br>
<br>
Please verify that your WDS service is running correctly, since
clearly there is no reaction to that packet from Boot server.<br>
<br>
<img src="cid:part1.D5D7AB08.7A6AF604@linux.intel.com" alt=""><br>
<br>
<div class="moz-cite-prefix">On 28-Jun-21 22:05, LathaKannan
Arumugam via groups.io wrote:<br>
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Can you <span>please help us on this issues? </span></div>
<div id="ms-outlook-mobile-signature">Get <a
href="https://aka.ms/AAb9ysg" moz-do-not-send="true">Outlook
for Android</a></div>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:devel@edk2.groups.io">devel@edk2.groups.io</a> <a class="moz-txt-link-rfc2396E" href="mailto:devel@edk2.groups.io"><devel@edk2.groups.io></a> on behalf of
LathaKannan Arumugam via groups.io
<a class="moz-txt-link-rfc2396E" href="mailto:larumugam=microsoft.com@groups.io"><larumugam=microsoft.com@groups.io></a><br>
<b>Sent:</b> Friday, June 25, 2021 1:11:42 PM<br>
<b>To:</b> Bret Barkelew <a class="moz-txt-link-rfc2396E" href="mailto:Bret.Barkelew@microsoft.com"><Bret.Barkelew@microsoft.com></a>;
Rabeda, Maciej <a class="moz-txt-link-rfc2396E" href="mailto:maciej.rabeda@linux.intel.com"><maciej.rabeda@linux.intel.com></a>;
<a class="moz-txt-link-abbreviated" href="mailto:devel@edk2.groups.io">devel@edk2.groups.io</a> <a class="moz-txt-link-rfc2396E" href="mailto:devel@edk2.groups.io"><devel@edk2.groups.io></a><br>
<b>Subject:</b> Re: [EXTERNAL] Re: [edk2-devel] NetworkPkg:
Unexpected DHCP RELEASE after PXE server reply on IPv6</font>
<div> </div>
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<p class="x_MsoNormal">Any inputs?</p>
<p class="x_MsoNormal">We kind of blocked on this for a week.
Kindly look into packet capture and suggest a path forward.</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"> </p>
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<div style="border:none; border-top:solid #E1E1E1 1.0pt;
padding:3.0pt 0in 0in 0in">
<p class="x_MsoNormal"><b>From:</b> LathaKannan Arumugam <br>
<b>Sent:</b> Friday, June 25, 2021 9:23 AM<br>
<b>To:</b> Bret Barkelew
<a class="moz-txt-link-rfc2396E" href="mailto:Bret.Barkelew@microsoft.com"><Bret.Barkelew@microsoft.com></a>; Rabeda, Maciej
<a class="moz-txt-link-rfc2396E" href="mailto:maciej.rabeda@linux.intel.com"><maciej.rabeda@linux.intel.com></a>;
<a class="moz-txt-link-abbreviated" href="mailto:devel@edk2.groups.io">devel@edk2.groups.io</a><br>
<b>Subject:</b> RE: [EXTERNAL] Re: [edk2-devel]
NetworkPkg: Unexpected DHCP RELEASE after PXE server
reply on IPv6</p>
</div>
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<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Attached packet captured from server.</p>
<p class="x_MsoNormal"> </p>
<div>
<div style="border:none; border-top:solid #E1E1E1 1.0pt;
padding:3.0pt 0in 0in 0in">
<p class="x_MsoNormal"><b>From:</b> Bret Barkelew <<a
href="mailto:Bret.Barkelew@microsoft.com"
moz-do-not-send="true">Bret.Barkelew@microsoft.com</a>>
<br>
<b>Sent:</b> Friday, June 25, 2021 9:19 AM<br>
<b>To:</b> Rabeda, Maciej <<a
href="mailto:maciej.rabeda@linux.intel.com"
moz-do-not-send="true">maciej.rabeda@linux.intel.com</a>>;
<a href="mailto:devel@edk2.groups.io"
moz-do-not-send="true">devel@edk2.groups.io</a>;
LathaKannan Arumugam <<a
href="mailto:larumugam@microsoft.com"
moz-do-not-send="true">larumugam@microsoft.com</a>><br>
<b>Subject:</b> Re: [EXTERNAL] Re: [edk2-devel]
NetworkPkg: Unexpected DHCP RELEASE after PXE server
reply on IPv6</p>
</div>
</div>
<p class="x_MsoNormal"> </p>
<div>
<div>
<div>
<p class="x_MsoNormal" style="background:white"><span
style="color:black">+ <a id="OWAAM331444"
href="mailto:larumugam@microsoft.com"
moz-do-not-send="true">
<span
style="font-family:"Calibri",sans-serif;
text-decoration:none">@LathaKannan Arumugam</span></a></span></p>
</div>
</div>
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<p class="x_MsoNormal"> </p>
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<p class="x_MsoNormal">- Bret</p>
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<p class="x_MsoNormal"><b><span style="color:black">From:</span></b><span
style="color:black"> Rabeda, Maciej <<a
href="mailto:maciej.rabeda@linux.intel.com"
moz-do-not-send="true">maciej.rabeda@linux.intel.com</a>><br>
<b>Sent:</b> Friday, June 25, 2021 7:40:16 AM<br>
<b>To:</b> <a href="mailto:devel@edk2.groups.io"
moz-do-not-send="true">devel@edk2.groups.io</a> <<a
href="mailto:devel@edk2.groups.io"
moz-do-not-send="true">devel@edk2.groups.io</a>>;
Bret Barkelew <<a
href="mailto:Bret.Barkelew@microsoft.com"
moz-do-not-send="true">Bret.Barkelew@microsoft.com</a>>;
Bret Barkelew <<a
href="mailto:Bret.Barkelew@microsoft.com"
moz-do-not-send="true">Bret.Barkelew@microsoft.com</a>><br>
<b>Subject:</b> [EXTERNAL] Re: [edk2-devel] NetworkPkg:
Unexpected DHCP RELEASE after PXE server reply on IPv6</span>
</p>
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<p class="x_MsoNormal"> </p>
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<div>
<p class="x_MsoNormal" style="margin-bottom:12.0pt">Looking
at it. Any chance to get Wireshark trace for this
scenario?</p>
<div>
<p class="x_MsoNormal">On 25-Jun-21 09:25, brbarkel via
groups.io wrote:</p>
</div>
<blockquote style="margin-top:5.0pt; margin-bottom:5.0pt">
<p class="x_MsoNormal">Just poking this to see if anyone
has any ideas. Thanks! </p>
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