Public bug reported:
Systemd incorrectly ignores whole messages when IAID is missing for some
sections.
This has been reported upstream [1] and fixed [2].
$ lsb_release -rd
Description: Ubuntu 21.04
Release: 21.04
$ apt-cache policy systemd
systemd:
Installed: 247.3-3ubuntu3.6
Candidate: 247.3-3ubuntu3.6
Version table:
*** 247.3-3ubuntu3.6 500
500 http://no.archive.ubuntu.com/ubuntu hirsute-updates/main amd64
Packages
100 /var/lib/dpkg/status
247.3-3ubuntu3.4 500
500 http://security.ubuntu.com/ubuntu hirsute-security/main amd64
Packages
247.3-3ubuntu3 500
500 http://no.archive.ubuntu.com/ubuntu hirsute/main amd64 Packages
What is expected to happen is that systemd will ignore only the relevant part
of the message, not the entire message.
What is happening is that the entire message is ignored, leading to DHCP
leases not being renewed. This is fairly easy to replicate e.g in AWS by
enabling both an IPv6 prefix and an IPv6 single address to the same
interface.
[1] https://github.com/systemd/systemd/issues/20803
[2] https://github.com/systemd/systemd/pull/20807
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1945888
Title:
DHCPv6 too strict when the response is missing IAID for some sections
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