<div dir="ltr">The trouble is that the end device boots too quick and grabs the 192 address from the modem(cable labs spec) then moments later it halts and asks for all the information that would normally be in the DHCP options. The lease from the modem expires, it requests...server NAK's it. It then gets all the proper info but the client doesn't read in all of the options. In a perfect world I have advised the vendor to read in the options and continue with the client. In the real world, I am trying to setup things so when I see a NAK, I execute a script...if it matches an OUI then I lookup the IP that it received, SSH into the client and reboot it. The modem is online and everything starts up normal. We are essentially building a reboot script into the client where it reboots if it fails to receive options the first time around.<div><br></div><div>Hope this helps, thanks for replying!</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><br><div><div style="font-size:small">Mark Spring<br></div><span style="font-size:small">Information Systems Manager</span><br></div></div></div></div></div></div>
<br><div class="gmail_quote">On Thu, Jul 20, 2017 at 8:45 AM, perl-list <span dir="ltr"><<a href="mailto:perl-list@network1.net" target="_blank">perl-list@network1.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Andale Mono;font-size:10pt;color:#000000"><div style="font-family:Andale Mono;font-size:10pt;color:#000000"><div>Mark,</div><div><br></div><div>That is completely normal. The device 00:03:e6:6f:42:14 previously had an address of 192.168.100.20 and attempted to renew such address. Apparently that address is not valid on the network your DHCP server is on. So, a NAK was sent followed by a discover from the client. The client and server then negotiated a 10.4.2.191 address.</div></div><div style="font-family:Andale Mono;font-size:10pt;color:#000000"><br></div><div style="font-family:Andale Mono;font-size:10pt;color:#000000">What is the actual problem that you are having as I am not sure this has anything to do with it...<br><br><hr id="m_4808717052128994203zwchr"><div><blockquote style="border-left:2px solid #1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><b>From: </b>"Mark Spring" <<a href="mailto:mspring@nktelco.com" target="_blank">mspring@nktelco.com</a>><br><b>To: </b>"Users of ISC DHCP" <<a href="mailto:dhcp-users@lists.isc.org" target="_blank">dhcp-users@lists.isc.org</a>><br><b>Sent: </b>Thursday, July 20, 2017 8:31:30 AM<br><b>Subject: </b>Re: Script to run on DHCPNAK<br></blockquote></div><div><blockquote style="border-left:2px solid #1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><div><div class="h5"><div dir="ltr">isc, just one server here is an example<br><div><div><i><span face="monospace, monospace" style="font-family:monospace,monospace">Jul 19 10:04:36 dhcp dhcpd: DHCPREQUEST for 192.168.100.20 from 00:03:e6:6f:42:14 via <a href="http://10.4.0.1" target="_blank">10.4.0.1</a>: wrong net</span></i></div><div><i><span face="monospace, monospace" style="font-family:monospace,monospace">Jul 19 10:04:36 dhcp dhcpd: DHCPNAK on 192.168.100.20 to 00:03:e6:6f:42:14 via 10.4.0.1</span></i></div><div><i><span face="monospace, monospace" style="font-family:monospace,monospace">Jul 19 10:04:39 dhcp dhcpd: DHCPDISCOVER from 00:03:e6:6f:42:14 via 10.4.0.1</span></i></div><div><i><span face="monospace, monospace" style="font-family:monospace,monospace">Jul 19 10:04:40 dhcp dhcpd: DHCPOFFER on 10.4.2.191 to 00:03:e6:6f:42:14 via 10.4.0.1</span></i></div><div><i><span face="monospace, monospace" style="font-family:monospace,monospace">Jul 19 10:04:40 dhcp dhcpd: DHCPREQUEST for 10.4.2.191 (192.168.100.3) from 00:03:e6:6f:42:14 via 10.4.0.</span></i></div><div><i><span face="monospace, monospace" style="font-family:monospace,monospace">Jul 19 10:04:40 dhcp dhcpd: DHCPACK on 10.4.2.191 to 00:03:e6:6f:42:14 via 10.4.0.1</span></i></div></div><br></div><div class="gmail_extra"><br clear="all"><div><div class="m_4808717052128994203gmail_signature"><div dir="ltr"><div><div dir="ltr"><br><div><div style="font-size:small">Mark Spring<br></div><span style="font-size:small">Information Systems Manager</span><br></div></div></div></div></div></div>
<br><div class="gmail_quote">On Thu, Jul 20, 2017 at 8:22 AM, perl-list <span dir="ltr"><<a href="mailto:perl-list@network1.net" target="_blank">perl-list@network1.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Andale Mono;font-size:10pt;color:#000000"><div style="font-family:Andale Mono;font-size:10pt;color:#000000"><br>Are the NAK and ACK coming from the same server? Can you post example log messages of the NAK and ACK and related communication? I assume this is ISC DHCP that we are speaking of and not some proprietary DHCP server?</div><div style="font-family:Andale Mono;font-size:10pt;color:#000000"><br><hr id="m_4808717052128994203m_7362953434195411861zwchr"><div><blockquote style="border-left:2px solid #1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><br></blockquote></div><div><blockquote style="border-left:2px solid #1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><span><div dir="ltr">I am having some issues with network gear, and while arguing with vendors about who's problem it really is..I noticed that my device receives a NAK before it receives the proper IP address from our server(when the gear comes back online). If I can track this down in the logs then I can look for the ACK that follows, login to the device and reboot it properly. <br><div><div><div class="m_4808717052128994203m_7362953434195411861gmail_signature"><div dir="ltr"><div><div dir="ltr"></div></div></div></div></div>
</div></div>
<br></span>___</blockquote></div></div><br></div></div><br>______________________________<wbr>_________________<br>
dhcp-users mailing list<br>
<a href="mailto:dhcp-users@lists.isc.org" target="_blank">dhcp-users@lists.isc.org</a><br>
<a href="https://lists.isc.org/mailman/listinfo/dhcp-users" rel="noreferrer" target="_blank">https://lists.isc.org/mailman/<wbr>listinfo/dhcp-users</a><br></blockquote></div><br></div>
<br>
</div></div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">NKTelco</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">301 W. South St.</span><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">New Knoxville, OH 45871</span></div><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)"><br></span></div><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">Phone: 1-888-NKTELCO</span></div><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">Fax: <a href="tel:(419)%20753-2950" value="+14197532950" target="_blank">419-753-2950</a></span><div><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">This message and the file(s) attached are confidential and proprietary</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">information of NKTelco for the sole use of the intended recipient. Any </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">unauthorized review, distribution, disclosure, copying, use, or </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">dissemination, either whole or in part, is strictly prohibited. Do not </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">transmit these documents, in any form, to any third party without the </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">expressed written permission of NKTelco.</span></div></div><span class=""><br>______________________________<wbr>_________________<br>dhcp-users mailing list<br><a href="mailto:dhcp-users@lists.isc.org" target="_blank">dhcp-users@lists.isc.org</a><br><a href="https://lists.isc.org/mailman/listinfo/dhcp-users" target="_blank">https://lists.isc.org/mailman/<wbr>listinfo/dhcp-users</a></span></blockquote></div></div><br></div></div><br>______________________________<wbr>_________________<br>
dhcp-users mailing list<br>
<a href="mailto:dhcp-users@lists.isc.org">dhcp-users@lists.isc.org</a><br>
<a href="https://lists.isc.org/mailman/listinfo/dhcp-users" rel="noreferrer" target="_blank">https://lists.isc.org/mailman/<wbr>listinfo/dhcp-users</a><br></blockquote></div><br></div>
<br>
<span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">NKTelco</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">301 W. South St.</span><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">New Knoxville, OH 45871</span></div><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)"><br></span></div><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">Phone: 1-888-NKTELCO</span></div><div><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">Fax: 419-753-2950</span><div><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">This message and the file(s) attached are confidential and proprietary</span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">information of NKTelco for the sole use of the intended recipient. Any </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">unauthorized review, distribution, disclosure, copying, use, or </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">dissemination, either whole or in part, is strictly prohibited. Do not </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">transmit these documents, in any form, to any third party without the </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;background-color:rgb(255,255,255)"><span style="font-family:arial,sans-serif;font-size:small;color:rgb(34,34,34);background-color:rgb(255,255,255)">expressed written permission of NKTelco.</span></div></div>