<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.ui-provider
{mso-style-name:ui-provider;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-GB" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Managed to increase verbosity on logs and also alter tcpdump to see the inbound stuff and the responses of the dhcp server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">What seems to happen is that the client seems to get stuck in a loop of<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Dicover->Offer->Discover->Offer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">(so kea is responding correctly to the discover)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">But the client doesn’t go onto perform the request for the address. It’ll do this every 5 seconds & I don’t understand why.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">fc:fe:c2:05:3e:b7 is the dhcping client and I give it a reservation for 19.99.99.3.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">10.99.99.119 is the dhcp server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Logged:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.835 DEBUG [kea-dhcp4.packets/282727.140679905825152] DHCP4_BUFFER_RECEIVED received buffer from 0.0.0.0:68 to 255.255.255.255:67 over interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.835 DEBUG [kea-dhcp4.options/282727.140679872231104] DHCP4_BUFFER_UNPACK parsing buffer received from 0.0.0.0 to 255.255.255.255 over interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_SUBNET4_SELECT_NO_RAI_OPTIONS No RAI options found to use for subnet selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_SUBNET4_SELECT_NO_RELAY_ADDRESS Relay address (giaddr) in client packet is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_SUBNET4_SELECT_BY_INTERFACE_NO_MATCH No subnet matches interface: enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.99.99.0/24 for packet received by matching address 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.packets/282727.140679872231104] DHCP4_SUBNET_SELECTED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: the subnet with ID 1 was selected for client
assignments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.packets/282727.140679872231104] DHCP4_PACKET_RECEIVED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: DHCPDISCOVER (type 1) received from 0.0.0.0
to 255.255.255.255 on interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_SUBNET4_SELECT_NO_RAI_OPTIONS No RAI options found to use for subnet selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_SUBNET4_SELECT_NO_RELAY_ADDRESS Relay address (giaddr) in client packet is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_SUBNET4_SELECT_BY_INTERFACE_NO_MATCH No subnet matches interface: enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.99.99.0/24 for packet received by matching address 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.packets/282727.140679872231104] DHCP4_SUBNET_SELECTED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: the subnet with ID 1 was selected for client
assignments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.hosts/282727.140679872231104] HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with IPv4 reservation for subnet id 1, identified by hwaddr=FCFEC2053EB7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.hosts/282727.140679872231104] HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using identifier: hwaddr=FCFEC2053EB7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.836 DEBUG [kea-dhcp4.hosts/282727.140679872231104] HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier hwaddr=FCFEC2053EB7, found 1 host(s)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.hosts/282727.140679872231104] HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_HOST using subnet id 1 and identifier hwaddr=FCFEC2053EB7, found host: hwaddr=FCFEC2053EB7
ipv4_subnet_id=1 hostname=(empty) ipv4_reservation=10.99.99.3 siaddr=(no) sname=(empty) file=(empty) key=(empty) ipv6_reservations=(none)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.dhcp4/282727.140679872231104] DHCP4_CLASS_ASSIGNED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: client packet has been assigned to the following
class(es): KNOWN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.dhcp4/282727.140679872231104] DHCP4_CLASS_ASSIGNED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: client packet has been assigned to the following
class(es): ALL, KNOWN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.ddns/282727.140679872231104] DHCP4_CLIENT_HOSTNAME_PROCESS [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: processing client's Hostname option<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.dhcpsrv/282727.140679872231104] DHCPSRV_MEMFILE_GET_HWADDR obtaining IPv4 leases for hardware address hwtype=1 fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.alloc-engine/282727.140679872231104] ALLOC_ENGINE_V4_DISCOVER_HR client [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1 sending DHCPDISCOVER has
reservation for the address 10.99.99.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 INFO [kea-dhcp4.leases/282727.140679872231104] DHCP4_LEASE_ADVERT [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: lease 10.99.99.3 will be advertised<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.options/282727.140679872231104] DHCP4_PACKET_PACK [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: preparing on-wire format of the packet to be
sent<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:18.837 DEBUG [kea-dhcp4.packets/282727.140679872231104] DHCP4_PACKET_SEND [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0x873cbbf1: trying to send packet DHCPOFFER (type 2) from
10.99.99.119:67 to 255.255.255.255:68 on interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.packets/282727.140679905825152] DHCP4_BUFFER_RECEIVED received buffer from 0.0.0.0:68 to 255.255.255.255:67 over interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.dhcpsrv/282727.140679905825152] DHCPSRV_TIMERMGR_RUN_TIMER_OPERATION running operation for timer: reclaim-expired-leases<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.alloc-engine/282727.140679905825152] ALLOC_ENGINE_V4_LEASES_RECLAMATION_START starting reclamation of expired leases (limit = 100 leases or 250 milliseconds)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.dhcpsrv/282727.140679905825152] DHCPSRV_MEMFILE_GET_EXPIRED4 obtaining maximum 101 of expired IPv4 leases<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.options/282727.140679863838400] DHCP4_BUFFER_UNPACK parsing buffer received from 0.0.0.0 to 255.255.255.255 over interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.alloc-engine/282727.140679905825152] ALLOC_ENGINE_V4_LEASES_RECLAMATION_COMPLETE reclaimed 0 leases in 0.081 ms<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.alloc-engine/282727.140679905825152] ALLOC_ENGINE_V4_NO_MORE_EXPIRED_LEASES all expired leases have been reclaimed<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_SUBNET4_SELECT_NO_RAI_OPTIONS No RAI options found to use for subnet selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.726 DEBUG [kea-dhcp4.dhcpsrv/282727.140679905825152] DHCPSRV_TIMERMGR_START_TIMER starting timer: reclaim-expired-leases<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_SUBNET4_SELECT_NO_RELAY_ADDRESS Relay address (giaddr) in client packet is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_SUBNET4_SELECT_BY_INTERFACE_NO_MATCH No subnet matches interface: enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.99.99.0/24 for packet received by matching address 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.packets/282727.140679863838400] DHCP4_SUBNET_SELECTED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: the subnet with ID 1 was selected for client
assignments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.packets/282727.140679863838400] DHCP4_PACKET_RECEIVED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: DHCPDISCOVER (type 1) received from 0.0.0.0
to 255.255.255.255 on interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_SUBNET4_SELECT_NO_RAI_OPTIONS No RAI options found to use for subnet selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_SUBNET4_SELECT_NO_RELAY_ADDRESS Relay address (giaddr) in client packet is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_SUBNET4_SELECT_BY_INTERFACE_NO_MATCH No subnet matches interface: enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.99.99.0/24 for packet received by matching address 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.packets/282727.140679863838400] DHCP4_SUBNET_SELECTED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: the subnet with ID 1 was selected for client
assignments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.hosts/282727.140679863838400] HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with IPv4 reservation for subnet id 1, identified by hwaddr=FCFEC2053EB7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.hosts/282727.140679863838400] HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using identifier: hwaddr=FCFEC2053EB7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.hosts/282727.140679863838400] HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier hwaddr=FCFEC2053EB7, found 1 host(s)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.hosts/282727.140679863838400] HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_HOST using subnet id 1 and identifier hwaddr=FCFEC2053EB7, found host: hwaddr=FCFEC2053EB7
ipv4_subnet_id=1 hostname=(empty) ipv4_reservation=10.99.99.3 siaddr=(no) sname=(empty) file=(empty) key=(empty) ipv6_reservations=(none)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcp4/282727.140679863838400] DHCP4_CLASS_ASSIGNED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: client packet has been assigned to the following
class(es): KNOWN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.dhcp4/282727.140679863838400] DHCP4_CLASS_ASSIGNED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: client packet has been assigned to the following
class(es): ALL, KNOWN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.727 DEBUG [kea-dhcp4.ddns/282727.140679863838400] DHCP4_CLIENT_HOSTNAME_PROCESS [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: processing client's Hostname option<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.728 DEBUG [kea-dhcp4.dhcpsrv/282727.140679863838400] DHCPSRV_MEMFILE_GET_HWADDR obtaining IPv4 leases for hardware address hwtype=1 fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.728 DEBUG [kea-dhcp4.alloc-engine/282727.140679863838400] ALLOC_ENGINE_V4_DISCOVER_HR client [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475 sending DHCPDISCOVER has
reservation for the address 10.99.99.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.728 INFO [kea-dhcp4.leases/282727.140679863838400] DHCP4_LEASE_ADVERT [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: lease 10.99.99.3 will be advertised<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.728 DEBUG [kea-dhcp4.options/282727.140679863838400] DHCP4_PACKET_PACK [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: preparing on-wire format of the packet to be
sent<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:22.728 DEBUG [kea-dhcp4.packets/282727.140679863838400] DHCP4_PACKET_SEND [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: trying to send packet DHCPOFFER (type 2) from
10.99.99.119:67 to 255.255.255.255:68 on interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.packets/282727.140679905825152] DHCP4_BUFFER_RECEIVED received buffer from 0.0.0.0:68 to 255.255.255.255:67 over interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.options/282727.140679847052992] DHCP4_BUFFER_UNPACK parsing buffer received from 0.0.0.0 to 255.255.255.255 over interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_SUBNET4_SELECT_NO_RAI_OPTIONS No RAI options found to use for subnet selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_SUBNET4_SELECT_NO_RELAY_ADDRESS Relay address (giaddr) in client packet is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_SUBNET4_SELECT_BY_INTERFACE_NO_MATCH No subnet matches interface: enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.99.99.0/24 for packet received by matching address 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.packets/282727.140679847052992] DHCP4_SUBNET_SELECTED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: the subnet with ID 1 was selected for client
assignments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.170 DEBUG [kea-dhcp4.packets/282727.140679847052992] DHCP4_PACKET_RECEIVED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: DHCPDISCOVER (type 1) received from 0.0.0.0
to 255.255.255.255 on interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_SUBNET4_SELECT_NO_RAI_OPTIONS No RAI options found to use for subnet selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_SUBNET4_SELECT_NO_RELAY_ADDRESS Relay address (giaddr) in client packet is empty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_SUBNET4_SELECT_BY_INTERFACE_NO_MATCH No subnet matches interface: enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_CFGMGR_SUBNET4_ADDR selected subnet 10.99.99.0/24 for packet received by matching address 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.packets/282727.140679847052992] DHCP4_SUBNET_SELECTED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: the subnet with ID 1 was selected for client
assignments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.hosts/282727.140679847052992] HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with IPv4 reservation for subnet id 1, identified by hwaddr=FCFEC2053EB7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.hosts/282727.140679847052992] HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using identifier: hwaddr=FCFEC2053EB7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.hosts/282727.140679847052992] HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier hwaddr=FCFEC2053EB7, found 1 host(s)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.hosts/282727.140679847052992] HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_HOST using subnet id 1 and identifier hwaddr=FCFEC2053EB7, found host: hwaddr=FCFEC2053EB7
ipv4_subnet_id=1 hostname=(empty) ipv4_reservation=10.99.99.3 siaddr=(no) sname=(empty) file=(empty) key=(empty) ipv6_reservations=(none)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcp4/282727.140679847052992] DHCP4_CLASS_ASSIGNED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: client packet has been assigned to the following
class(es): KNOWN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcp4/282727.140679847052992] DHCP4_CLASS_ASSIGNED [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: client packet has been assigned to the following
class(es): ALL, KNOWN<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.ddns/282727.140679847052992] DHCP4_CLIENT_HOSTNAME_PROCESS [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: processing client's Hostname option<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.dhcpsrv/282727.140679847052992] DHCPSRV_MEMFILE_GET_HWADDR obtaining IPv4 leases for hardware address hwtype=1 fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 DEBUG [kea-dhcp4.alloc-engine/282727.140679847052992] ALLOC_ENGINE_V4_DISCOVER_HR client [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475 sending DHCPDISCOVER has
reservation for the address 10.99.99.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.171 INFO [kea-dhcp4.leases/282727.140679847052992] DHCP4_LEASE_ADVERT [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: lease 10.99.99.3 will be advertised<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.172 DEBUG [kea-dhcp4.options/282727.140679847052992] DHCP4_PACKET_PACK [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: preparing on-wire format of the packet to be
sent<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">2024-01-21 20:18:27.172 DEBUG [kea-dhcp4.packets/282727.140679847052992] DHCP4_PACKET_SEND [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf12fb475: trying to send packet DHCPOFFER (type 2) from
10.99.99.119:67 to 255.255.255.255:68 on interface enp2s0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Corresponding packets from tcpdump:<br>
20:18:18.835591 fc:fe:c2:05:3e:b7 > Broadcast, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 64, id 14, offset 0, flags [none], proto UDP (17), length 328)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fc:fe:c2:05:3e:b7, length 300, xid 0x873cbbf1, secs 172, Flags [Broadcast]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Client-Ethernet-Address fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Vendor-rfc1048 Extensions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Magic Cookie 0x63825363<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> DHCP-Message (53), length 1: Discover<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Hostname (12), length 15: "WiserHeat053EB7"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">20:18:18.838005 90:2b:34:5f:ff:10 > Broadcast, ethertype IPv4 (0x0800), length 366: (tos 0x10, ttl 128, id 0, offset 0, flags [DF], proto UDP (17), length 352)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> 10.99.99.119.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 324, xid 0x873cbbf1, Flags [Broadcast]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Your-IP 10.99.99.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Client-Ethernet-Address fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Vendor-rfc1048 Extensions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Magic Cookie 0x63825363<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> DHCP-Message (53), length 1: Offer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Subnet-Mask (1), length 4: 255.255.255.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Default-Gateway (3), length 4: 10.99.99.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Domain-Name-Server (6), length 8: 10.99.99.119,10.99.99.111<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Hostname (12), length 15: "wiserheat053eb7"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Domain-Name (15), length 15: "ad.domain.net"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Lease-Time (51), length 4: 43200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Server-ID (54), length 4: 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> RN (58), length 4: 900<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> RB (59), length 4: 1800<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">20:18:22.726283 fc:fe:c2:05:3e:b7 > Broadcast, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 328)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fc:fe:c2:05:3e:b7, length 300, xid 0xf12fb475, Flags [Broadcast]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Client-Ethernet-Address fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Vendor-rfc1048 Extensions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Magic Cookie 0x63825363<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> DHCP-Message (53), length 1: Discover<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Hostname (12), length 15: "WiserHeat053EB7"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">20:18:22.728499 90:2b:34:5f:ff:10 > Broadcast, ethertype IPv4 (0x0800), length 366: (tos 0x10, ttl 128, id 0, offset 0, flags [DF], proto UDP (17), length 352)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> 10.99.99.119.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 324, xid 0xf12fb475, Flags [Broadcast]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Your-IP 10.99.99.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Client-Ethernet-Address fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Vendor-rfc1048 Extensions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Magic Cookie 0x63825363<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> DHCP-Message (53), length 1: Offer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Subnet-Mask (1), length 4: 255.255.255.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Default-Gateway (3), length 4: 10.99.99.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Domain-Name-Server (6), length 8: 10.99.99.119,10.99.99.111<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Hostname (12), length 15: "wiserheat053eb7"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Domain-Name (15), length 15: "ad.domain.net"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Lease-Time (51), length 4: 43200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Server-ID (54), length 4: 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> RN (58), length 4: 900<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> RB (59), length 4: 1800<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">20:18:27.170230 fc:fe:c2:05:3e:b7 > Broadcast, ethertype IPv4 (0x0800), length 342: (tos 0x0, ttl 64, id 2, offset 0, flags [none], proto UDP (17), length 328)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fc:fe:c2:05:3e:b7, length 300, xid 0xf12fb475, secs 5, Flags [Broadcast]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Client-Ethernet-Address fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Vendor-rfc1048 Extensions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Magic Cookie 0x63825363<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> DHCP-Message (53), length 1: Discover<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Hostname (12), length 15: "WiserHeat053EB7"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">20:18:27.172248 90:2b:34:5f:ff:10 > Broadcast, ethertype IPv4 (0x0800), length 366: (tos 0x10, ttl 128, id 0, offset 0, flags [DF], proto UDP (17), length 352)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> 10.99.99.119.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 324, xid 0xf12fb475, Flags [Broadcast]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Your-IP 10.99.99.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Client-Ethernet-Address fc:fe:c2:05:3e:b7<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Vendor-rfc1048 Extensions<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Magic Cookie 0x63825363<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> DHCP-Message (53), length 1: Offer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Subnet-Mask (1), length 4: 255.255.255.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Default-Gateway (3), length 4: 10.99.99.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Domain-Name-Server (6), length 8: 10.99.99.119,10.99.99.111<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Hostname (12), length 15: "wiserheat053eb7"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Domain-Name (15), length 15: "ad.domain.net"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Lease-Time (51), length 4: 43200<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> Server-ID (54), length 4: 10.99.99.119<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> RN (58), length 4: 900<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"> RB (59), length 4: 1800<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">It’s very sporadic. Sometimes it refuses to get an address (having rebooted the router, restarted, dhcp, restarted the wireless access point), sometimes it’ll request and renew it’s address for hours
and work fine.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I have splunk tracking the RSSI of the client, it’s not getting amazing signal but it should be sufficient. (-68 to -72 over last 2 hours)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Considering replacing the AP but there’s nothing wrong with the AP except distance to the Wiser device<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Kea-users <kea-users-bounces@lists.isc.org>
<b>On Behalf Of </b>Rick Frey<br>
<b>Sent:</b> 21 January 2024 16:42<br>
<b>To:</b> Kea user's list <kea-users@lists.isc.org><br>
<b>Subject:</b> Re: [Kea-users] dhcp4 server stops responding to a device<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The listed Kea logs for DHCP_LEASE_ADVERT would indicate that Kea is sending an OFFER to the DISCOVER request. It would seem unlikely that Kea logs the ADVERT without attempting to send the offer packet on the network (such a bug would
likely affect more than your client). You also mention that you had similar issue with the legacy ISC dhcpd server. You also mention recent issue began after distro upgrade. Assuming there were not changes to Kea with the upgrade.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Not enough info in thread to determine, but seems more probable that the OFFER is being dropped/blocked by your OS/network layer. Generally, if offer packet is blocked by something such as NFTables/IPTables, Kea would also log something
along the lines of <span class="ui-provider"><span style="color:black">"failed to send DHCPv4 packet: pkt4 send failed: sendmsg() returned with an error: Operation not permitted”. Apparmor/SELinux or similar security controls could also be in play.</span></span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="color:black"><br>
<br>
</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="color:black">You may want to try packet capture without filters (or just limit to port 67/68) in case there are some breadcrumbs there. If you have not already, recommend checking OS logs as well in case response packet dropped
by your host. You can also turn up Kea loglevel (severity DEBUG and increased debuglevel) but since Kea is logging ADVERT, not sure you’ll learn more there. See </span><a href="https://kea.readthedocs.io/en/kea-2.4.1/arm/logging.html#logging-levels">https://kea.readthedocs.io/en/kea-2.4.1/arm/logging.html#logging-levels</a>
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">On Jan 19, 2024, at 07:37, Gavin Davenport <<a href="mailto:gavdav@gavdav.net">gavdav@gavdav.net</a>> wrote:<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">Does anyone have any idea why dhcp would not actually emit the dhcp response following logging<br>
2024-01-19 13:35:02.390 INFO [kea-dhcp4.leases/855.139674733151936] DHCP4_LEASE_ADVERT [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf3db5a1f: lease 10.99.99.3 will be advertised<br>
2024-01-19 13:35:17.539 INFO [kea-dhcp4.leases/855.139674758330048] DHCP4_LEASE_ADVERT [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf3db5a1f: lease 10.99.99.3 will be advertised<br>
2024-01-19 13:35:32.689 INFO [kea-dhcp4.leases/855.139674749937344] DHCP4_LEASE_ADVERT [hwtype=1 fc:fe:c2:05:3e:b7], cid=[no info], tid=0xf3db5a1f: lease 10.99.99.3 will be advertised<br>
<br>
It's received the discover (visible in tcpdump) but why would it get jammed and refuse to respond to this ?<br>
<br>
is there anything I have misconfigured in the scope ? Are there any improved debugging options I might use ?<br>
<br>
-----Original Message-----<br>
From: Kea-users <<a href="mailto:kea-users-bounces@lists.isc.org">kea-users-bounces@lists.isc.org</a>> On Behalf Of Gavin Davenport<br>
Sent: 16 January 2024 20:46<br>
To: Kea user's list <<a href="mailto:kea-users@lists.isc.org">kea-users@lists.isc.org</a>><br>
Subject: Re: [Kea-users] dhcp4 server stops responding to a device<br>
<br>
I was using isc-dhcp and had this behaviour too:<br>
<a href="https://gitlab.isc.org/isc-projects/dhcp/-/issues/177">https://gitlab.isc.org/isc-projects/dhcp/-/issues/177</a><br>
<br>
I switched to kea-dhcp4 and it fixed it.<br>
<br>
I've since done a distro upgrade and it's gone flaky again. <br>
<br>
I've no idea how to diagnose signal quality from the data I can get from the wiser (there's a rest endpoint) but this isn't available when it gets unaddressed.<o:p></o:p></p>
</div>
</div>
</blockquote>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</body>
</html>