** Changed in: systemd
       Status: Unknown => New

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https://bugs.launchpad.net/bugs/2028811

Title:
  systemd-network installs adjacency routes to DNS servers from DHCP
  even if they're off-net

Status in systemd:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  This is a known issue upstream:

  https://github.com/systemd/systemd/issues/28495

  and indeed a fix is milestoned for v255:

  https://github.com/systemd/systemd/pull/28508

  It would be good to see this in the next backports build.

  Note: this bug only manifests when the DHCP server is sending you a
  list of DNS servers (fairly common) as well as static-classless-routes
  (option 121... much less common).

  
  Description:  Ubuntu 22.04.2 LTS
  Release:      22.04

  
  systemd:
    Installed: 249.11-0ubuntu3.9
    Candidate: 249.11-0ubuntu3.9
    Version table:
   *** 249.11-0ubuntu3.9 500
          500 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64 
Packages
          100 /var/lib/dpkg/status
       249.11-0ubuntu3.7 500
          500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 
Packages
       249.11-0ubuntu3 500
          500 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: systemd 249.11-0ubuntu3.9
  ProcVersionSignature: Ubuntu 5.15.0-76.83-generic 5.15.99
  Uname: Linux 5.15.0-76-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Wed Jul 26 16:57:28 2023
  InstallationDate: Installed on 2017-02-28 (2339 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 
(20170215.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Lsusb-t:
   /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 5000M
   /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
  MachineType: Red Hat KVM
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-76-generic 
root=/dev/mapper/ubuntu--vg-root ro crashkernel=384M-:128M 
crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-2G:128M,2G-:256M 
crashkernel=384M-2G:128M,2G-:256M crashkernel=384M-2G:128M,2G-:256M 
crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M 
crashkernel=384M-:128M crashkernel=512M-:192M
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: systemd
  SystemdFailedUnits:
   Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 
4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use 
systemd-escape?).
   Unit \xe2\x97\x8f.service could not be found.
   ------
   Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 
4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use 
systemd-escape?).
   Unit \xe2\x97\x8f.service could not be found.
  UpgradeStatus: Upgraded to jammy on 2022-09-07 (322 days ago)
  dmi.bios.date: 04/01/2014
  dmi.bios.release: 0.0
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: 1.16.1-1.el9
  dmi.board.name: RHEL
  dmi.board.vendor: Red Hat
  dmi.board.version: RHEL-9.2.0 PC (Q35 + ICH9, 2009)
  dmi.chassis.type: 1
  dmi.chassis.vendor: Red Hat
  dmi.chassis.version: RHEL-9.2.0 PC (Q35 + ICH9, 2009)
  dmi.modalias: 
dmi:bvnSeaBIOS:bvr1.16.1-1.el9:bd04/01/2014:br0.0:svnRedHat:pnKVM:pvrRHEL-9.2.0PC(Q35+ICH9,2009):rvnRedHat:rnRHEL:rvrRHEL-9.2.0PC(Q35+ICH9,2009):cvnRedHat:ct1:cvrRHEL-9.2.0PC(Q35+ICH9,2009):sku9.2.0:
  dmi.product.family: Red Hat Enterprise Linux
  dmi.product.name: KVM
  dmi.product.sku: 9.2.0
  dmi.product.version: RHEL-9.2.0 PC (Q35 + ICH9, 2009)
  dmi.sys.vendor: Red Hat

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