the networking is configured via systemd-networkd.
bonding module is loaded with 'max_bonds=0' to address upcoming systemd change
https://github.com/systemd/systemd/issues/6184
pre-upgrade:
# networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 eth0 ether carrier configuring
3 eth1 ether carrier configuring
4 bond0 ether routable configured
5 bond0.200 ether routable configured
# 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: eth0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master bond0
state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master bond0
state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
4: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 9000 qdisc noqueue state
UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
5: bond0.200@bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
interfaces(.d) and netplan are empty and unused/disabled
/etc/systemd/network:
# cat eth1.network
[Match]
Name=eth1
[Network]
Bond=bond0
# cat eth0.network
[Match]
Name=eth0
[Network]
Bond=bond0
# cat bond0.netdev
[NetDev]
Name=bond0
Kind=bond
[Bond]
Mode=802.3ad
MIIMonitorSec=0.1s
LACPTransmitRate=fast
UpDelaySec=0.2s
DownDelaySec=0.2s
# cat bond0.network
[Match]
Name=bond0
[Address]
Address=192.168.1.100/24
[Route]
Gateway=192.168.1.1
[Network]
VLAN=bond0.200
[Link]
MTUBytes=9000
# cat bond0.200.netdev
[NetDev]
Name=bond0.200
Kind=vlan
[VLAN]
Id=200
# cat bond0.200.network
[Match]
Name=bond0.200
[Address]
Address=10.10.0.100/16
[Route]
Gateway=10.10.0.1
[Link]
MTUBytes=9000
After upgrade:
# networkctl
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 eth0 ether carrier configuring
3 eth1 ether carrier configuring
4 bond0 ether routable configured
5 bond0.200 ether routable configured
However, the link of eth0, eth1 and the bond and vlan interface changes
to NOARP
# 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: eth0: <BROADCAST,MULTICAST,NOARP,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master
bond0 state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
3: eth1: <BROADCAST,MULTICAST,NOARP,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master
bond0 state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
4: bond0: <BROADCAST,MULTICAST,NOARP,MASTER,UP,LOWER_UP> mtu 9000 qdisc noqueue
state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
5: bond0.200@bond0: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP mode DEFAULT group default qlen 1000
link/ether 5a:42:ff:c5:26:61 brd ff:ff:ff:ff:ff:ff
** Bug watch added: github.com/systemd/systemd/issues #6184
https://github.com/systemd/systemd/issues/6184
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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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