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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt'>Just to build some more in here … <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>I tried to create a fake option 56 using the following config <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option dhcp6.ntp-servers code 56 = text;<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option dhcp6.ntp-servers "This is a test";<o:p></o:p></span></i></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>and it does causes Option 56 to show up, but obviously, it is malformed, as expected. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>Then I go with a proper definition of Option 56 as an encapsulation option as shown below <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option space ntp56 code width 2 length width 2 hash size 2;<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option ntp56.address code 1 = array of ip6-address;<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option ntp56.fqdn code 3 = text;<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option opt56 code 56 = encapsulate ntp56;<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt'>option ntp56.address ::1;<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt'>vendor-option-space ntp56;<o:p></o:p></span></i></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>This one does not generate any Option 56 structure, invalid or otherwise. It is strange to me, since I know the syntax is correct and follows ISC documentation, but for some reason the Option 56 is not being generated here. Why, I am clueless. Any hints would be really appreciated. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>M<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt'>From:</span></b><span style='font-size:11.0pt'> Marek Hajduczenia <mxhajduczenia@gmail.com> <br><b>Sent:</b> Thursday, January 18, 2024 3:20 PM<br><b>To:</b> Users of ISC DHCP <dhcp-users@lists.isc.org><br><b>Subject:</b> Re: DHCPv6 Option 56 configuration<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt'>Thank you, Milo, but the DHCPv6 clients explicitly request option 56 and happily ignore the vale passed in the sntp option. I dug through all documents I can find online, including this mailing list, and found nothing showing how this Option could be implemented. Why is it defined at all if it is not being used?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'>M<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt'><o:p> </o:p></span></p><div id=mail-editor-reference-message-container><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:12.0pt;font-family:"Aptos",sans-serif;color:black'>From: </span></b><span style='font-size:12.0pt;font-family:"Aptos",sans-serif;color:black'>dhcp-users <<a href="mailto:dhcp-users-bounces@lists.isc.org">dhcp-users-bounces@lists.isc.org</a>> on behalf of Miloslav Hůla <<a href="mailto:miloslav.hula@gmail.com">miloslav.hula@gmail.com</a>><br><b>Date: </b>Thursday, January 18, 2024 at 3:14</span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'> </span><span style='font-size:12.0pt;font-family:"Aptos",sans-serif;color:black'>PM<br><b>To: </b><a href="mailto:dhcp-users@lists.isc.org">dhcp-users@lists.isc.org</a> <<a href="mailto:dhcp-users@lists.isc.org">dhcp-users@lists.isc.org</a>><br><b>Subject: </b>Re: DHCPv6 Option 56 configuration<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt'>Dne 18.01.2024 v 19:54 Marek Hajduczenia napsal(a):<br>> Dear mailing list users,<br>> I have been trying to define NTPv6 option to use with ISC-DHCPD6 daemon <br>> (4.4.1 running on Ubuntu 22.04 server) as follows<br><br>Hi,<br><br>I think there is an integrated option:<br><br>option dhcp6.sntp-servers fc00:6ce4:40:146::1;<br><br>Milo<br>-- <br>ISC funds the development of this software with paid support subscriptions. Contact us at <a href="https://www.isc.org/contact/">https://www.isc.org/contact/</a> for more information.<br><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">https://lists.isc.org/mailman/listinfo/dhcp-users</a><o:p></o:p></span></p></div></div></div></div></body></html>