[Bug 1839231] Re: (re)starting networkd removes still-valid RFC 4941 ipv6 addrs

[Nick Rosbrook]

Please re-open if this is still an issue on newer releases.

** Changed in: systemd (Ubuntu)
       Status: Confirmed => Won't Fix

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Title:
  (re)starting networkd removes still-valid RFC 4941 ipv6 addrs

Status in systemd package in Ubuntu:
  Won't Fix

Bug description:
  I updated my Ubuntu 18.04.2 server from systemd 237-3ubuntu10.24 to
  237-3ubuntu10.25. This caused a restart of systemd-networkd, breaking
  all TCP-over-IPv6 connections.

  apt history entry:

  Start-Date: 2019-08-06  19:46:21
  Commandline: apt-get dist-upgrade -y
  Requested-By: shivaram (1000)
  Upgrade: libsystemd0:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), udev:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), libudev1:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), systemd-sysv:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), libpam-systemd:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), systemd:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), libnss-systemd:amd64 (237-3ubuntu10.24, 237-3ubuntu10.25), base-files:amd64 (10.1ubuntu2.5, 10.1ubuntu2.6)
  End-Date: 2019-08-06  19:54:17

  systemd journal output:

  Aug 06 19:47:40 pentos systemd[1]: Reloading.
  Aug 06 19:47:57 pentos systemd[1]: Reexecuting.
  Aug 06 19:47:58 pentos systemd[1]: systemd 237 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hie
  Aug 06 19:47:58 pentos systemd[1]: Detected architecture x86-64.
  Aug 06 19:47:58 pentos systemd[1]: Stopping Network Service...
  Aug 06 19:47:58 pentos systemd[1]: Stopped Network Service.
  Aug 06 19:47:58 pentos systemd[1]: Starting Network Service...
  Aug 06 19:47:59 pentos systemd-networkd[11513]: ens5: Gained IPv6LL
  Aug 06 19:47:59 pentos systemd-networkd[11513]: Enumeration completed
  Aug 06 19:47:59 pentos systemd[1]: Started Network Service.
  Aug 06 19:47:59 pentos systemd-networkd[11513]: lo: Link is not managed by us
  Aug 06 19:47:59 pentos systemd-networkd[11513]: ens5: DHCPv4 address 192.168.1.103/24 via 192.168.1.1
  Aug 06 19:47:59 pentos dbus-daemon[947]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.2341' (uid=100 pid=11513 comm="/lib/systemd/systemd-network
  Aug 06 19:47:59 pentos systemd-networkd[11513]: ens5: Configured

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