<div dir="ltr"><div><br></div><div class="gmail_extra"><div class="gmail_quote">On Sat, Apr 9, 2016 at 6:40 AM, Jim Glassford <span dir="ltr"><<a href="mailto:jmglass@iup.edu" target="_blank">jmglass@iup.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Hi Julie,<br>
<br>
Maybe related to dhcp snooping on layer two switch.<br>
If PXE server is different than dhcp server, snooping would block PXE boot. Would see this in the switch logs.<br>
If using HP ProCurve switch running older firmware, known problems with PXE booting with dhcp snooping enabled, upgrade or disable dhcp snooping. (not sure of versions with problems and nothing logged was when this happened)<br>
<br>
best!<br>
jim<div><div class="h5"><br>
<br>
On Sat, 9 Apr 2016 00:21:43 +0000<br>
Julie Xu <<a href="mailto:J.Xu@westernsydney.edu.au" target="_blank">J.Xu@westernsydney.edu.au</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
Hi,<br>
<br>
I have problem with one campus PXE boot.<br>
<br>
Basically, when you boot a window machine normally, it can get ip addres, but if you do PXE boot, it can not get.<br>
<br>
This case happens when we change network switch. Yes, it is switch issue, not dhcp.<br>
<br>
But, what is different PXE boot and normally boot different?<br>
<br>
On PXE boot, I can see the dhcp discover send out; I can see dhcp offer send out from dhcp server. but, the dhcp offer never pass the switch to the machine.<br>
<br>
<br>
Any comments will be appreciated<br>
<br>
Thanks in advance<br>
<br>
Julie Xu<br>
<br>
</blockquote>
<br></div></div></blockquote><div><br></div>Try adding:<div> always-broadcast true;</div><div>to that subnet. Some combinations of routers and clients need that option, but it increases the broadcast traffic, so I don't just use it everywhere. (For me, it is Juniper switches and Mac clients that hit this issue.)</div><div><br></div><div>-- </div><div>Bob Harold</div><div> </div></div><br></div></div>