** Description changed:
+ [Impact]
+
+ * Incomplete cherrypick of ARP functionality in networkd resulted in an
+ undesired side-effect, specifically NOARP flag started to be applied
+ unconditionally, specifically when it should not have, resulting in loss
+ of network connectivity.
+
+ * This is a regression in -updates.
+
+ [Test Case]
+
+ * Configure a bond using networkd
+ * Upgrade
+ * Make sure NOARP flag is not set on the interfaces / bond
+
+ [Regression Potential]
+
+ * This is an upstream fix for this issue.
+
+ [Other Info]
+
+ * Upstream fix
+
https://github.com/systemd/systemd/commit/1ed1f50f8277df07918e13cba3331a114eaa6fe3.patch
+
+ * Original bug report
+
this breaks existing configurations with bonding on upgrading from
229-4ubuntu19 to 229-4ubuntu20 on xenial
as bond interfaces are now by default configured without ARP. Hence you
suddenly lose network connectivity on upgrade. Very bad for a SRU.
Plus adding "ARP=yes" to the Link section of a .network file does not
work.
Before this update, bond interfaces (specifically 802.3ad) were
defaulting to ARP enabled. After the upgrade, they are created with
NOARP set on the link.
pre-upgrade:
eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP>
eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP>
bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP>
post-upgrade:
eth0: <BROADCAST,MULTICAST,NOARP,SLAVE,UP,LOWER_UP>
eth1: <BROADCAST,MULTICAST,NOARP,SLAVE,UP,LOWER_UP>
bond0: <BROADCAST,MULTICAST,NOARP,MASTER,UP,LOWER_UP>
Linux cnode11 4.4.0-97-generic #120-Ubuntu SMP Tue Sep 19 17:28:18 UTC
2017 x86_64 x86_64 x86_64 GNU/Linux
** Changed in: systemd (Ubuntu)
Importance: Undecided => Critical
** Also affects: systemd (Ubuntu Artful)
Importance: Undecided
Status: New
** Also affects: systemd (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: systemd (Ubuntu Bionic)
Importance: Critical
Status: Confirmed
** Also affects: systemd (Ubuntu Zesty)
Importance: Undecided
Status: New
** Changed in: systemd (Ubuntu Xenial)
Status: New => In Progress
** Changed in: systemd (Ubuntu Xenial)
Importance: Undecided => Critical
** Changed in: systemd (Ubuntu Zesty)
Status: New => Fix Released
** Changed in: systemd (Ubuntu Artful)
Status: New => Fix Released
** Changed in: systemd (Ubuntu Bionic)
Status: Confirmed => Fix Released
** Changed in: systemd (Ubuntu Xenial)
Assignee: (unassigned) => Dimitri John Ledkov (xnox)
** Changed in: systemd (Ubuntu Xenial)
Milestone: None => xenial-updates
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https://bugs.launchpad.net/bugs/1727301
Title:
229-4ubuntu20 added ARP option breaks existing bonding interfaces
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