Public bug reported:
[impact]
if networkd is configured with ipv6 address but the 'disable_ipv6'
sysctl is enabled, networkd does not enable it and set the ipv6
configuration.
[test case]
[Match]
Name=ens3
[Network]
DHCP=ipv4
LinkLocalAddressing=ipv6
Address=2001:db8::100/64
manually disable ipv6 for the interface:
ubuntu@lp1859862-b:~$ echo 1 | sudo tee
/proc/sys/net/ipv6/conf/ens3/disable_ipv6
1
the interface should not contain any ipv6 addresses:
ubuntu@lp1859862-b:~$ ip -6 a show ens3
ubuntu@lp1859862-b:~$
restart networkd; it should enable ipv6 as ipv6 addresses are
configured, but it does not:
ubuntu@lp1859862-b:~$ sudo systemctl restart systemd-networkd
ubuntu@lp1859862-b:~$ ip -6 a show ens3
ubuntu@lp1859862-b:~$
[regression potential]
any regression would likely result in failure to configure ipv6
addresses/routes.
[scope]
this is needed only for Eoan.
this is fixed by commit 57ad76074670d4859e808a6aabd69fd6e58514c5, which
is included starting in v243, so this is fixed in Focal and later.
this bug was introduced by a series of patches starting at
54a1a535bd60f13964bbddd8f381601e33e8e56f, which is included starting in
v243, but was also pulled into Debian v242-4, and so included in Eoan.
This bug is not present in earlier versions so is not needed in Xenial
or Bionic.
[other info]
this is a follow on for the fix in bug 1859862.
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: systemd (Ubuntu Eoan)
Importance: Low
Assignee: Dan Streetman (ddstreet)
Status: In Progress
** Also affects: systemd (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: systemd (Ubuntu Eoan)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: systemd (Ubuntu Eoan)
Status: New => In Progress
** Changed in: systemd (Ubuntu)
Status: New => Fix Released
** Changed in: systemd (Ubuntu Eoan)
Importance: Undecided => Medium
** Changed in: systemd (Ubuntu Eoan)
Importance: Medium => Low
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https://bugs.launchpad.net/bugs/1877271
Title:
networkd does not enable ipv6 when requested
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Eoan:
In Progress
Bug description:
[impact]
if networkd is configured with ipv6 address but the 'disable_ipv6'
sysctl is enabled, networkd does not enable it and set the ipv6
configuration.
[test case]
[Match]
Name=ens3
[Network]
DHCP=ipv4
LinkLocalAddressing=ipv6
Address=2001:db8::100/64
manually disable ipv6 for the interface:
ubuntu@lp1859862-b:~$ echo 1 | sudo tee
/proc/sys/net/ipv6/conf/ens3/disable_ipv6
1
the interface should not contain any ipv6 addresses:
ubuntu@lp1859862-b:~$ ip -6 a show ens3
ubuntu@lp1859862-b:~$
restart networkd; it should enable ipv6 as ipv6 addresses are
configured, but it does not:
ubuntu@lp1859862-b:~$ sudo systemctl restart systemd-networkd
ubuntu@lp1859862-b:~$ ip -6 a show ens3
ubuntu@lp1859862-b:~$
[regression potential]
any regression would likely result in failure to configure ipv6
addresses/routes.
[scope]
this is needed only for Eoan.
this is fixed by commit 57ad76074670d4859e808a6aabd69fd6e58514c5,
which is included starting in v243, so this is fixed in Focal and
later.
this bug was introduced by a series of patches starting at
54a1a535bd60f13964bbddd8f381601e33e8e56f, which is included starting
in v243, but was also pulled into Debian v242-4, and so included in
Eoan. This bug is not present in earlier versions so is not needed in
Xenial or Bionic.
[other info]
this is a follow on for the fix in bug 1859862.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1877271/+subscriptions
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