<div dir="ltr">Hi,<div><br></div><div>That's very true. While it seems a basic feature to me, surprisingly, I don't know any DHCP server in the world which meet this requirement.</div><div><br></div><div>Regards,</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 7, 2017 at 3:52 PM, Jan Schermer <span dir="ltr"><<a href="mailto:jan@schermer.cz" target="_blank">jan@schermer.cz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">I'll chime in - this is a must for any "cloud" or SDN use (OpenStack etc.).<div>Absolutely worth implementing.</div><div><br></div><div>Jan</div><div><br></div><div><br><div><blockquote type="cite"><div><div class="h5"><div>On 7 Feb 2017, at 15:48, Sutherland, Rob <<a href="mailto:RSutherland@BroadViewNet.com" target="_blank">RSutherland@BroadViewNet.com</a>> wrote:</div><br class="m_-5273606961451883708Apple-interchange-newline"></div></div><div><div><div class="h5"><div class="m_-5273606961451883708WordSection1" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif">I am in the same situation (i.e. must support overlapping/duplicate IP address ranges). We currently use a heavily-modified ISC DHCP daemon but would love to move to a solution that is<span class="m_-5273606961451883708Apple-converted-space"> </span><u></u><u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></div><div style="margin:0in 0in 0.0001pt 0.5in;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><span>1)<span style="font-style:normal;font-variant-caps:normal;font-weight:normal;font-size:7pt;line-height:normal;font-family:'Times New Roman'"> <span class="m_-5273606961451883708Apple-converted-space"> </span></span></span></span><span style="font-size:11pt;font-family:Calibri,sans-serif">backed by a database and<u></u><u></u></span></div><div style="margin:0in 0in 0.0001pt 0.5in;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><span>2)<span style="font-style:normal;font-variant-caps:normal;font-weight:normal;font-size:7pt;line-height:normal;font-family:'Times New Roman'"> <span class="m_-5273606961451883708Apple-converted-space"> </span></span></span></span><span style="font-size:11pt;font-family:Calibri,sans-serif">not so heavily customized.<u></u><u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif">Cheers,<u></u><u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif">Rob<u></u><u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><b><span style="font-size:10pt;font-family:Tahoma,sans-serif">From:</span></b><span style="font-size:10pt;font-family:Tahoma,sans-serif"><span class="m_-5273606961451883708Apple-converted-space"> </span>Kea-users [<a href="mailto:kea-users-bounces@lists.isc.org" style="color:purple;text-decoration:underline" target="_blank">mailto:kea-users-bounces@<wbr>lists.isc.org</a>]<span class="m_-5273606961451883708Apple-converted-space"> </span><b>On Behalf Of<span class="m_-5273606961451883708Apple-converted-space"> </span></b>S. M. Hossein Hamidi<br><b>Sent:</b><span class="m_-5273606961451883708Apple-converted-space"> </span>Friday, February 03, 2017 12:03 PM<br><b>To:</b><span class="m_-5273606961451883708Apple-converted-space"> </span>kea-users<br><b>Subject:</b><span class="m_-5273606961451883708Apple-converted-space"> </span>[Kea-users] Overlapping/duplicate subnets [faked-from]<u></u><u></u></span></div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif">Hi all,<u></u><u></u></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif">My mind is busy with a DHCP scenario that I couldn't end up with a configuration to support that. I am asking here to make sure it is not an oversight.<u></u><u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif">Suppose that we have several subnets which are behind a NAT device which additionally acts as a DHCP relay agent. I know that using DHCP relay agent information option, I can distinguish between different subnets. However, the additional constraint is to use duplicate or overlapping subnets instead of different subnets. Since, the traffic comes from each segment goes through NAT, it wouldn't be any problem to use duplicate IP addresses, knowing that each segment has its own autonomy.<u></u><u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif">As far as I know, the lease database use IP address as primary key. So, it seems duplicate IP addresses are not allowed. <u></u><u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif">Is there any workaround except running several instances of Kea to serve such a topology?<u></u><u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif"><u></u> <u></u></div></div><div><div style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:'Times New Roman',serif">Regards,<u></u><u></u></div></div></div></div></div></div><span style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">______________________________<wbr>_________________</span><br style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><span style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">Kea-users mailing list</span><br style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href="mailto:Kea-users@lists.isc.org" style="color:purple;text-decoration:underline;font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" target="_blank">Kea-users@lists.isc.org</a><br style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href="https://lists.isc.org/mailman/listinfo/kea-users" style="color:purple;text-decoration:underline;font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" target="_blank">https://lists.isc.org/mailman/<wbr>listinfo/kea-users</a></div></blockquote></div><br></div></div><br>______________________________<wbr>_________________<br>
Kea-users mailing list<br>
<a href="mailto:Kea-users@lists.isc.org">Kea-users@lists.isc.org</a><br>
<a href="https://lists.isc.org/mailman/listinfo/kea-users" rel="noreferrer" target="_blank">https://lists.isc.org/mailman/<wbr>listinfo/kea-users</a><br>
<br></blockquote></div><br></div>