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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