DHCP works correctly on 4.15.0-66 as stated above.

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https://bugs.launchpad.net/bugs/1859530

Title:
  DHCP cannot renew IP address with latest kernel

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  We recently updated our Bionic images to the latest kernel
  4.15.0-74-generic (from 4.15.0-66-generic) and the instances can no
  longer renew their DHCP addresses.

  systemd-networkd debug below:

  Jan 13 23:34:38 systemd-networkd[12072]: DHCP CLIENT (0x24fec70e): REQUEST 
(renewing)
  Jan 13 23:36:30  systemd-networkd[12072]: DHCP CLIENT (0x24fec70e): REQUEST 
(renewing)
  Jan 13 23:38:07  systemd-networkd[12072]: NDISC: Sent Router Solicitation, 
next solicitation in 8min 13s
  Jan 13 23:38:23  systemd-networkd[12072]: DHCP CLIENT (0x24fec70e): REQUEST 
(renewing)
  Jan 13 23:38:24  systemd-networkd[12072]: DHCP CLIENT (0x24fec70e): REQUEST 
(rebinding)
  Jan 13 23:39:25  systemd-networkd[12072]: DHCP CLIENT (0x24fec70e): REQUEST 
(rebinding)
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x24fec70e): EXPIRED
  Jan 13 23:39:39  systemd-networkd[12072]: ens3: DHCP lease lost
  Jan 13 23:39:39  systemd-networkd[12072]: ens3: Removing address 10.3.1.145
  Jan 13 23:39:39  systemd-networkd[12072]: Setting transient hostname: 'n/a'
  Jan 13 23:39:39  systemd-networkd[12072]: Sent message type=method_call 
sender=n/a destination=org.freedesktop.hostname1 
path=/org/freedesktop/hostname1 interface=org.freedesktop.hostname1 
member=SetHostname cookie=1
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): DISCOVER
  Jan 13 23:39:39  systemd-networkd[12072]: ens3: Removing address: 
10.3.1.145/20 (valid for 2s)
  Jan 13 23:39:39  systemd-networkd[12072]: Sent message type=signal sender=n/a 
destination=n/a path=/org/freedesktop/network1/link/_32 
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=20 
reply
  Jan 13 23:39:39  systemd-networkd[12072]: Sent message type=signal sender=n/a 
destination=n/a path=/org/freedesktop/network1 
interface=org.freedesktop.DBus.Properties member=PropertiesChanged cookie=21 
reply_cookie=0
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): OFFER
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): REQUEST 
(requesting)
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): received 
message was not an ACK, ignoring
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): ACK
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): lease 
expires in 9min 57s
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): T2 
expires in 8min 43s
  Jan 13 23:39:39  systemd-networkd[12072]: DHCP CLIENT (0x72860183): T1 
expires in 4min 57s
  Jan 13 23:39:39  systemd-networkd[12072]: ens3: DHCPv4 address 10.3.1.145/20 
via 10.3.0.1
  Jan 13 23:39:39  systemd-networkd[12072]: Setting transient hostname: 
'host-10-3-1-145'
  --- 
  ProblemType: Bug
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jan 14 00:01 seq
   crw-rw---- 1 root audio 116, 33 Jan 14 00:01 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.9
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: [Errno 2] No such file or directory: 'fuser': 
'fuser'
  DistroRelease: Ubuntu 18.04
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lspci: Error: [Errno 2] No such file or directory: 'lspci': 'lspci'
  Lsusb: Error: [Errno 2] No such file or directory: 'lsusb': 'lsusb'
  MachineType: OpenStack Foundation OpenStack Nova
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-74-generic root=/dev/vda1 
ro console=tty1 console=ttyS0
  ProcVersionSignature: Ubuntu 4.15.0-74.84-generic 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-74-generic N/A
   linux-backports-modules-4.15.0-74-generic  N/A
   linux-firmware                             1.173.14
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  Tags:  bionic uec-images
  Uname: Linux 4.15.0-74-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  WifiSyslog:
   
  _MarkForUpload: True
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.10.2-1.1~u16.04+mcp2
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-i440fx-bionic
  dmi.modalias: 
dmi:bvnSeaBIOS:bvr1.10.2-1.1~u16.04+mcp2:bd04/01/2014:svnOpenStackFoundation:pnOpenStackNova:pvr17.0.11:cvnQEMU:ct1:cvrpc-i440fx-bionic:
  dmi.product.family: Virtual Machine
  dmi.product.name: OpenStack Nova
  dmi.product.version: 17.0.11
  dmi.sys.vendor: OpenStack Foundation
  --- 
  ProblemType: Bug
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jan 14 00:01 seq
   crw-rw---- 1 root audio 116, 33 Jan 14 00:01 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.9
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: [Errno 2] No such file or directory: 'fuser': 
'fuser'
  DistroRelease: Ubuntu 18.04
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lspci: Error: [Errno 2] No such file or directory: 'lspci': 'lspci'
  Lsusb: Error: [Errno 2] No such file or directory: 'lsusb': 'lsusb'
  MachineType: OpenStack Foundation OpenStack Nova
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-74-generic root=/dev/vda1 
ro console=tty1 console=ttyS0
  ProcVersionSignature: Ubuntu 4.15.0-74.84-generic 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-74-generic N/A
   linux-backports-modules-4.15.0-74-generic  N/A
   linux-firmware                             1.173.14
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  Tags:  bionic uec-images
  Uname: Linux 4.15.0-74-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.10.2-1.1~u16.04+mcp2
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-i440fx-bionic
  dmi.modalias: 
dmi:bvnSeaBIOS:bvr1.10.2-1.1~u16.04+mcp2:bd04/01/2014:svnOpenStackFoundation:pnOpenStackNova:pvr17.0.11:cvnQEMU:ct1:cvrpc-i440fx-bionic:
  dmi.product.family: Virtual Machine
  dmi.product.name: OpenStack Nova
  dmi.product.version: 17.0.11
  dmi.sys.vendor: OpenStack Foundation

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