If that help here is my netplan setup that was working perfect in 18.04,
19.04, 19.10
network:
version: 2
renderer: networkd
ethernets:
enp0s31f6:
dhcp4: false
dhcp6: false
match:
macaddress: 1c:1b:0d:61:85:40
mtu: 9000
enp12s0f0:
dhcp4: false
dhcp6: false
match:
macaddress: 00:1b:21:66:6c:c8
mtu: 9000
enp2s0:
addresses:
- 192.168.2.1/24
dhcp4: false
dhcp6: false
match:
macaddress: 00:17:b6:00:97:8a
mtu: 9000
vlans: {}
wifis: {}
bonds:
bond0:
interfaces: [enp0s31f6, enp12s0f0]
mtu: 9000
parameters:
lacp-rate: slow
mode: 802.3ad
transmit-hash-policy: layer2+3
bridges:
br1:
link-local: [ ]
addresses: [ 192.168.1.166/24 ]
dhcp4: false
dhcp6: false
gateway4: 192.168.1.1
interfaces: [ bond0 ]
nameservers:
search: [maison.com]
addresses: [192.168.1.11, 192.168.1.12, 1.1.1.1]
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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
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