We have the same problem without bond configured. After upgrading to
systemd 229-4ubuntu20 NOARP is set to our network interfaces. The
machine has two network interfaces and the configuration is very simple:
# 50-ens5f0.network
[Match]
MACAddress=24:8a:7:11:50:a8
[Link]
MTUBytes=9000
[Network]
Address=10.32.34.34/30
DHCP=no
LinkLocalAddressing=no
IPv6AcceptRA=no
# 50-ens5f1.network
[Match]
MACAddress=24:8a:7:11:50:a9
[Link]
MTUBytes=9000
[Network]
Address=10.32.33.126/30
DHCP=no
LinkLocalAddressing=no
IPv6AcceptRA=no
# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode
DEFAULT group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens5f0: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc mq state UP
mode DEFAULT group default qlen 1000
link/ether 24:8a:07:11:50:a8 brd ff:ff:ff:ff:ff:ff
3: ens5f1: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc mq state UP
mode DEFAULT group default qlen 1000
link/ether 24:8a:07:11:50:a9 brd ff:ff:ff:ff:ff:ff
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https://bugs.launchpad.net/bugs/1727301
Title:
229-4ubuntu20 added ARP option breaks existing bonding interfaces
Status in systemd package in Ubuntu:
Confirmed
Bug description:
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
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