[Kea-users] ALLOC_ENGINE_V4_DISCOVER_ADDRESS_CONFLICT issue

[Darren Ankney]

Hi,

>From what you have provided, it appears that the static ip should have
been renewed for the printer.  There could be things in your
configuration that influence this, however.  Could you provide your
configuration file?

Thank you,
Darren Ankney

On Sun, Dec 22, 2024 at 8:26 PM fbcadmin via Kea-users
<kea-users at lists.isc.org> wrote:
>
> Hello
>
>  we have some hosts setup with reservations , which are instead getting a pool address.
>
>
> this printer which should have 10.1.25.132 but got 10.1.25.183 .  this printer and another get used overnight so we had to temporarily change the IP address at the cups print server .
>
>
> In the mean time we'll look at the programming on some of our recently replaced managed switches.  I suspect pvid is incorrect on some ports  or dhcp relay setting...  I had been working on network security settings - like limiting which vlans are accessible from some downstream switches..
>
>  in addition we use  proxmox to manage our virtual machines.   all debian KVM's which used dhcp-client had wrong addresses .  windows are okay.   LXC's are okay. a lot of testing and debugging was done. details are at https://forum.proxmox.com/threads/dhcp-issue-with-kvm-lxc-does-not-have-the-issue.159440/#post-731975
>
> here is some debugging info for a host that has this reservation.   If anyone has I suggestion on where to look to solve the issue I am all ears!  [ except the next 7 hours for sleep.]
>
>      {
>        "hostname": "p132.fantinibakery.com",
>        "ip-address": "10.1.25.132",
>        "hw-address": "b4:22:00:26:35:b5"
>      },
>
>
>
> sudo tcpdump -i eth0 port 67 or port 68 -e -n -vv
>
> 10.1.25.132      p132.fantinibakery.com p132
>  the following s/b p132:
>
> 18:55:34 ALLOC_ENGINE_V4_DISCOVER_ADDRESS_CONFLICT [hwtype=1 b4:22:00:26:35:b5], cid=[01:b4:22:00:26:35:b5], tid=0x1237: conflicting reservation for address 10.1.25.132 with existing lease Address:       10.1.25.132
> Valid life:    604800
> Cltt:          1734607378
> Hardware addr: b4:22:00:26:35:b5
> Client id:     01:b4:22:00:26:35:b5
> Subnet ID:     17
> Pool ID:       0
> State:         default
> Relay ID:      (none)
> Remote ID:     (none)
>
> 19:02:21.603380 1c:34:da:f4:05:0e > bc:24:11:e2:1d:b8, ethertype IPv4 (0x0800), length 355: (tos 0x0, ttl 64, id 59862, offset 0, flags [DF], pro
> to UDP (17), length 341)
>     10.1.3.202.67 > 10.1.3.15.67: [udp sum ok] BOOTP/DHCP, Request from b4:22:00:26:35:b5, length 313, hops 1, xid 0xdc07, Flags [none] (0x0000)
>           Gateway-IP 10.1.25.9
>           Client-Ethernet-Address b4:22:00:26:35:b5
>           Vendor-rfc1048 Extensions
>             Magic Cookie 0x63825363
>             DHCP-Message (53), length 1: Discover
>             Client-ID (61), length 7: ether b4:22:00:26:35:b5
>             Hostname (12), length 15: "BRNB422002635B5"
>             Parameter-Request (55), length 11:
>               Domain-Name-Server (6), Default-Gateway (3), Subnet-Mask (1), Domain-Name (15)
>               TFTP (66), BF (67), BS (13), Netbios-Name-Server (44)
>               Time-Zone (2), NTP (42), Hostname (12)
>             Agent-Information (82), length 28:
>               Circuit-ID SubOption 1, length 6: bond19
>               Remote-ID SubOption 2, length 18: 1c:34:da:f4:05:00^J
>
>
> 19:02:21.604284 bc:24:11:e2:1d:b8 > 1c:34:da:f4:05:0e, ethertype IPv4 (0x0800), length 418: (tos 0x10, ttl 128, id 0, offset 0, flags [DF], proto
>  UDP (17), length 404)
>     10.1.3.15.67 > 10.1.25.9.67: [udp sum ok] BOOTP/DHCP, Reply, length 376, hops 1, xid 0xdc07, Flags [none] (0x0000)
>           Your-IP 10.1.25.183
>           Gateway-IP 10.1.25.9
>           Client-Ethernet-Address b4:22:00:26:35:b5
>           Vendor-rfc1048 Extensions
>             Magic Cookie 0x63825363
>             DHCP-Message (53), length 1: Offer
>             Subnet-Mask (1), length 4: 255.255.255.0
>             Time-Zone (2), length 4: -5
>             Default-Gateway (3), length 4: 10.1.25.1
>             Domain-Name-Server (6), length 12: 127.0.0.1,10.1.3.41,10.1.3.40
>             Hostname (12), length 22: "p132.fantinibakery.com"
>             Domain-Name (15), length 17: "fantinibakery.com"
>             NTP (42), length 4: 10.1.0.2
>             Lease-Time (51), length 4: 604800
>             Server-ID (54), length 4: 10.1.3.15
>             Client-ID (61), length 7: ether b4:22:00:26:35:b5
>             Agent-Information (82), length 28:
>               Circuit-ID SubOption 1, length 6: bond19
>               Remote-ID SubOption 2, length 18: 1c:34:da:f4:05:00^J
>
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