Ubuntu
systemd package

  1. Bug #1839231
  2. Comment #2

Comment 2 for bug 1839231

Revision history for this message
Shivaram Lingamneni (slingamn) wrote : Re: updating bionic to 237-3ubuntu10.25 restarts systemd-networkd

Thanks! This system is using netplan, with ipv6-privacy enabled in netplan (subsequent to the fix in bug #1750392):

root@pentos:~# cat /etc/netplan/01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    ens5:
      dhcp4: true
      ipv6-privacy: true

The issue reproduces with the ens5 interface. Stopping systemd-networkd does not change any addresses, but starting it again removes all the "deprecated" addresses, even if they are in use by TCP connections:

root@pentos:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether [mac-redacted] brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.103/24 brd 192.168.1.255 scope global dynamic ens5
       valid_lft 52839sec preferred_lft 52839sec
    inet6 [redacted-ipv6-/64]:8d03:bfce:131d:190/64 scope global temporary dynamic
       valid_lft 596sec preferred_lft 596sec
    inet6 [redacted-ipv6-/64]:306e:2bf2:9d28:ef32/64 scope global temporary deprecated dynamic
       valid_lft 596sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:c060:f52:5638:10e9/64 scope global temporary deprecated dynamic
       valid_lft 596sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:d941:e7ff:cc75:9968/64 scope global temporary deprecated dynamic
       valid_lft 596sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:2dae:1ae3:c572:ed57/64 scope global temporary deprecated dynamic
       valid_lft 596sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:90ec:5051:54de:f345/64 scope global temporary deprecated dynamic
       valid_lft 596sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:5497:3bdc:6452:c67f/64 scope global temporary deprecated dynamic
       valid_lft 596sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:[slaac-redacted]/64 scope global dynamic mngtmpaddr noprefixroute
       valid_lft 596sec preferred_lft 596sec
    inet6 fe80::[ll-redacted]/64 scope link
       valid_lft forever preferred_lft forever
root@pentos:~# systemctl stop systemd-networkd
root@pentos:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether [mac-redacted] brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.103/24 brd 192.168.1.255 scope global dynamic ens5
       valid_lft 52794sec preferred_lft 52794sec
    inet6 [redacted-ipv6-/64]:8d03:bfce:131d:190/64 scope global temporary dynamic
       valid_lft 587sec preferred_lft 587sec
    inet6 [redacted-ipv6-/64]:306e:2bf2:9d28:ef32/64 scope global temporary deprecated dynamic
       valid_lft 587sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:c060:f52:5638:10e9/64 scope global temporary deprecated dynamic
       valid_lft 587sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:d941:e7ff:cc75:9968/64 scope global temporary deprecated dynamic
       valid_lft 587sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:2dae:1ae3:c572:ed57/64 scope global temporary deprecated dynamic
       valid_lft 587sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:90ec:5051:54de:f345/64 scope global temporary deprecated dynamic
       valid_lft 587sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:5497:3bdc:6452:c67f/64 scope global temporary deprecated dynamic
       valid_lft 587sec preferred_lft 0sec
    inet6 [redacted-ipv6-/64]:[slaac-redacted]/64 scope global dynamic mngtmpaddr noprefixroute
       valid_lft 587sec preferred_lft 587sec
    inet6 fe80::[ll-redacted]/64 scope link
       valid_lft forever preferred_lft forever
root@pentos:~# systemctl start systemd-networkd
root@pentos:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether [mac-redacted] brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.103/24 brd 192.168.1.255 scope global dynamic ens5
       valid_lft 86386sec preferred_lft 86386sec
    inet6 [redacted-ipv6-/64]:8d03:bfce:131d:190/64 scope global temporary dynamic
       valid_lft 598sec preferred_lft 598sec
    inet6 [redacted-ipv6-/64]:[slaac-redacted]/64 scope global dynamic mngtmpaddr noprefixroute
       valid_lft 598sec preferred_lft 598sec
    inet6 fe80::[ll-redacted]/64 scope link
       valid_lft forever preferred_lft forever
root@pentos:~#