Just a note to confirm that this bug still exists in the public release downloaded from the Ubuntu website today.
The crontab workaround has saved me a bit of angst. -- 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/1860926 Title: Ubuntu 20.04 Systemd fails to configure bridged network Status in systemd package in Ubuntu: Confirmed Status in systemd source package in Focal: Confirmed Bug description: [impact] A bridged interface with static ipv4 address and gateway configuration will fail to properly add the route via the gateway, leaving the system without a globally working network. [test case] On a Focal system, remove all network configuration and create this netplan: network: version: 2 renderer: networkd ethernets: enp4s0: dhcp4: false bridges: br0: interfaces: [enp4s0] dhcp4: no addresses: [192.168.0.4/24] gateway4: 192.168.0.1 nameservers: search: [mydomain] addresses: [192.168.0.1,192.168.0.2,192.168.0.3] Replace the interface name 'enp4s0' with the actual interface name on the test system. Reboot the system, and check the route to the gateway, which will be missing: root@lp1860926-f:~# ip r 192.168.0.0/24 dev br0 proto kernel scope link src 192.168.0.4 The route is expected to be present, e.g.: ubuntu@lp1860926-e:~$ ip r default via 192.168.0.1 dev br0 proto static 192.168.0.0/24 dev br0 proto kernel scope link src 192.168.0.4 [regression potential] Not SRU - N/A [scope] This is not reproducable on Eoan or Bionic; this is needed only for Focal. [original description] Freshly installed Ubuntu 20.04 fully patched to days date with static IP address works fine and survives a reboot network: version: 2 renderer: networkd ethernets: enp4s0: dhcp4: false addresses: [192.168.0.4/24] gateway4: 192.168.0.1 nameservers: search: [mydomain] addresses: [192.168.0.1,192.168.0.2,192.168.0.3] however when converted to a bridged network for kvm network: version: 2 renderer: networkd ethernets: enp4s0: dhcp4: false bridges: br0: interfaces: [enp4s0] dhcp4: no addresses: [192.168.0.4/24] gateway4: 192.168.0.1 nameservers: search: [mydomain] addresses: [192.168.0.1,192.168.0.2,192.168.0.3] will not survive a reboot and required systemd-network to be restarted or @reboot /usr/sbin/netplan apply added to the crontab after a reboot the network can not b eaccseed and a systemctl status systemd-networkd produces systemd-networkd.service - Network Service Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled) Active: active (running) since Sun 2020-01-26 16:36:28 UTC; 2min 27s ago TriggeredBy: ● systemd-networkd.socket Docs: man:systemd-networkd.service(8) Main PID: 979 (systemd-network) Status: "Processing requests..." Tasks: 1 (limit: 57662) Memory: 4.1M CGroup: /system.slice/systemd-networkd.service └─979 /lib/systemd/systemd-networkd Jan 26 16:38:02 firebolt systemd-networkd[979]: rtnl: received neighbor for link '5' we don't know about, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Link UP Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Gained carrier Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0: Link UP Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Link DOWN Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Lost carrier Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Kernel removed an address we don't remember: fe80::5054:ff:fed9:7e26/64 (valid forever), ignoring. systemctl restart systemd-networkd resolved the issue and a systemctl status systemd-network producessystemd-networkd.service - Network Service Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled) Active: active (running) since Sun 2020-01-26 16:39:28 UTC; 41s ago TriggeredBy: ● systemd-networkd.socket Docs: man:systemd-networkd.service(8) Main PID: 1650 (systemd-network) Status: "Processing requests..." Tasks: 1 (limit: 57662) Memory: 1.6M CGroup: /system.slice/systemd-networkd.service └─1650 /lib/systemd/systemd-networkd Jan 26 16:39:28 firebolt systemd[1]: Starting Network Service... Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: netdev ready Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: Gained IPv6LL Jan 26 16:39:28 firebolt systemd-networkd[1650]: Enumeration completed Jan 26 16:39:28 firebolt systemd[1]: Started Network Service. Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: netdev exists, using existing without changing its parameters Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: IPv6 successfully enabled a journalctl -u systemd-network produces Jan 26 16:36:28 firebolt systemd[1]: Starting Network Service... Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: netdev ready Jan 26 16:36:28 firebolt systemd-networkd[979]: Enumeration completed Jan 26 16:36:28 firebolt systemd-networkd[979]: wlp3s0: Interface name change detected, wlp3s0 has been renamed to wlan0. Jan 26 16:36:28 firebolt systemd[1]: Started Network Service. Jan 26 16:36:28 firebolt systemd-networkd[979]: wlan0: Interface name change detected, wlan0 has been renamed to wlp3s0. Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: IPv6 successfully enabled Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: Link UP Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: Gained carrier Jan 26 16:36:28 firebolt systemd-networkd[979]: enp4s0: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:36:28 firebolt systemd-networkd[979]: enp4s0: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: Lost carrier Jan 26 16:36:28 firebolt systemd-networkd[979]: enp4s0: Link UP Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: Gained carrier Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: Could not set route: Network is unreachable Jan 26 16:36:28 firebolt systemd-networkd[979]: br0: Failed Jan 26 16:36:30 firebolt systemd-networkd[979]: br0: Lost carrier Jan 26 16:36:31 firebolt systemd-networkd[979]: enp4s0: Gained carrier Jan 26 16:36:31 firebolt systemd-networkd[979]: br0: Gained carrier Jan 26 16:38:02 firebolt systemd-networkd[979]: rtnl: received neighbor for link '5' we don't know about, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0: rtnl: received neighbor message with invalid family, ignoring. Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Link UP Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Gained carrier Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0: Link UP Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Link DOWN Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Lost carrier Jan 26 16:38:02 firebolt systemd-networkd[979]: virbr0-nic: Kernel removed an address we don't remember: fe80::5054:ff:fed9:7e26/64 (valid forever), ignoring. Jan 26 16:39:28 firebolt systemd[1]: Stopping Network Service... Jan 26 16:39:28 firebolt systemd[1]: systemd-networkd.service: Succeeded. Jan 26 16:39:28 firebolt systemd[1]: Stopped Network Service. Jan 26 16:39:28 firebolt systemd[1]: Starting Network Service... Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: netdev ready Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: Gained IPv6LL Jan 26 16:39:28 firebolt systemd-networkd[1650]: Enumeration completed Jan 26 16:39:28 firebolt systemd[1]: Started Network Service. Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: netdev exists, using existing without changing its parameters Jan 26 16:39:28 firebolt systemd-networkd[1650]: br0: IPv6 successfully enabled the network should restart properly after a reboot liek in earlier version of ubuntu 18.04 for example To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1860926/+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
