dhcp server gives same address to two machines

Issue

• Problem with the DHCP server on an RHEL7 machine that gives the same address to two different clients.
• Problem with the DHCP server on an RHEL8 machine that gives the same address to two different clients.
• DHCP gives duplicate or same IP addresses to two different machine
• DHCP gives duplicate or same IP addresses to three different machine

• DHCP gives duplicate or same IP addresses to the systemd-networked dhcp client

• Reproducer using a test RHEL8 DHCP server and Ubuntu-20.04 with systemd-networkd

Template VM:
Jan 28 16:24:58 rhel7-c1 dhcpd: DHCPDISCOVER from 08:00:27:3c:bc:fa (test-vm) via eth0
Jan 28 16:24:59 rhel7-c1 dhcpd: DHCPOFFER on 192.168.5.151 to 08:00:27:3c:bc:fa (test-vm) via eth0
Jan 28 16:24:59 rhel7-c1 dhcpd: DHCPREQUEST for 192.168.5.151 (192.168.5.7) from 08:00:27:3c:bc:fa (test-vm) via eth0
Jan 28 16:24:59 rhel7-c1 dhcpd: DHCPACK on 192.168.5.151 to 08:00:27:3c:bc:fa (test-vm) via eth0

Jan 28 16:28:29 rhel7-c1 dhcpd: DHCPDISCOVER from 08:00:27:3c:bc:fa (test-vm) via eth0
Jan 28 16:28:30 rhel7-c1 dhcpd: DHCPOFFER on 192.168.5.151 to 08:00:27:3c:bc:fa (test-vm) via eth0
Jan 28 16:28:30 rhel7-c1 dhcpd: DHCPREQUEST for 192.168.5.151 (192.168.5.7) from 08:00:27:3c:bc:fa (test-vm) via eth0
Jan 28 16:28:30 rhel7-c1 dhcpd: DHCPACK on 192.168.5.151 to 08:00:27:3c:bc:fa (test-vm) via eth0

Clone - 1:
Jan 28 16:29:22 rhel7-c1 dhcpd: DHCPDISCOVER from 08:00:27:7e:f5:aa (test-vm) via eth0
Jan 28 16:29:22 rhel7-c1 dhcpd: DHCPOFFER on 192.168.5.151 to 08:00:27:7e:f5:aa (test-vm) via eth0
Jan 28 16:29:22 rhel7-c1 dhcpd: DHCPREQUEST for 192.168.5.151 (192.168.5.7) from 08:00:27:7e:f5:aa (test-vm) via eth0
Jan 28 16:29:22 rhel7-c1 dhcpd: DHCPACK on 192.168.5.151 to 08:00:27:7e:f5:aa (test-vm) via eth0

Clone - 2:
Jan 28 16:31:18 rhel7-c1 dhcpd: DHCPDISCOVER from 08:00:27:e1:c7:a9 (test-vm) via eth0
Jan 28 16:31:18 rhel7-c1 dhcpd: Abandoning IP address 192.168.5.151: pinged before offer
Jan 28 16:31:19 rhel7-c1 dhcpd: DHCPDISCOVER from 08:00:27:e1:c7:a9 via eth0
Jan 28 16:31:20 rhel7-c1 dhcpd: DHCPOFFER on 192.168.5.150 to 08:00:27:e1:c7:a9 (test-vm) via eth0
Jan 28 16:31:20 rhel7-c1 dhcpd: DHCPREQUEST for 192.168.5.150 (192.168.5.7) from 08:00:27:e1:c7:a9 (test-vm) via eth0
Jan 28 16:31:20 rhel7-c1 dhcpd: DHCPACK on 192.168.5.150 to 08:00:27:e1:c7:a9 (test-vm) via eth0

Clone - 3:
Jan 28 16:32:17 rhel7-c1 dhcpd: DHCPDISCOVER from 08:00:27:45:39:45 (test-vm) via eth0
Jan 28 16:32:17 rhel7-c1 dhcpd: DHCPOFFER on 192.168.5.150 to 08:00:27:45:39:45 (test-vm) via eth0
Jan 28 16:32:17 rhel7-c1 dhcpd: DHCPREQUEST for 192.168.5.150 (192.168.5.7) from 08:00:27:45:39:45 (test-vm) via eth0
Jan 28 16:32:17 rhel7-c1 dhcpd: DHCPACK on 192.168.5.150 to 08:00:27:45:39:45 (test-vm) via eth0