How are eth0/eth1/bond0 configured? Do you use netplan and networkd? Do you use ifupdown?
Can you paste the output of $ networkctl? Copies of the configuration e.g.: /etc/network/interfaces /etc/network/interfaces.d/* /etc/netplan/* /run/systemd/network/* /etc/systemd/network/* -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1727301 Title: 229-4ubuntu20 added ARP option breaks existing bonding interfaces Status in systemd package in Ubuntu: New 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1727301/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
