[Bug 1872185] [NEW] Netplan not connecting bridge with static IP

[Jane Atkinson]

Public bug reported:

System is Xubuntu 20.04, built up from Xubuntu-core base.


I have a very simple bridge consisting of one ethernet interface, which I need for bridging to QEMU/KVM vms. It used to work properly on 18.04.

The .yaml file is as follows:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp3s0:
      dhcp4: no


  bridges:
    br0:
      dhcp4: no
      dhcp6: no
      addresses: [ 192.168.1.65/24 ]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [ 192.168.1.1 ]
      interfaces:
        - enp3s0


On logging in immediately after bootup, I see that br0 is UP, but has no IP address assigned to it.

syslog contains the item:

systemd-networkd[367]: br0: Could not set route: Nexthop has invalid
gateway. Network is unreachable


If I run "sudo netplan apply", either after logging in or as a @reboot cron job, the bridge then connects with no problem.


If I change br0 to dhcp4: yes (and remove addresses, gateway4 and nameservers), br0 connects automatically on bootup. I can tweak dnsmasq on the router so that the machine gets the IP I want every time, but I'd prefer to be able to set a static IP address and have it work.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: netplan.io 0.98-0ubuntu4
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat Apr 11 22:44:49 2020
InstallationDate: Installed on 2020-04-08 (3 days ago)
InstallationMedia: Xubuntu Core 20.04 - amd64 - 20200403
SourcePackage: netplan.io
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: netplan.io (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1872185

Title:
  Netplan not connecting bridge with static IP

Status in netplan.io package in Ubuntu:
  New

Bug description:
  System is Xubuntu 20.04, built up from Xubuntu-core base.

  
  I have a very simple bridge consisting of one ethernet interface, which I need for bridging to QEMU/KVM vms. It used to work properly on 18.04.

  The .yaml file is as follows:

  network:
    version: 2
    renderer: networkd
    ethernets:
      enp3s0:
        dhcp4: no

  
    bridges:
      br0:
        dhcp4: no
        dhcp6: no
        addresses: [ 192.168.1.65/24 ]
        gateway4: 192.168.1.1
        nameservers:
          addresses: [ 192.168.1.1 ]
        interfaces:
          - enp3s0

  
  On logging in immediately after bootup, I see that br0 is UP, but has no IP address assigned to it.

  syslog contains the item:

  systemd-networkd[367]: br0: Could not set route: Nexthop has invalid
  gateway. Network is unreachable

  
  If I run "sudo netplan apply", either after logging in or as a @reboot cron job, the bridge then connects with no problem.

  
  If I change br0 to dhcp4: yes (and remove addresses, gateway4 and nameservers), br0 connects automatically on bootup. I can tweak dnsmasq on the router so that the machine gets the IP I want every time, but I'd prefer to be able to set a static IP address and have it work.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: netplan.io 0.98-0ubuntu4
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu26
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Sat Apr 11 22:44:49 2020
  InstallationDate: Installed on 2020-04-08 (3 days ago)
  InstallationMedia: Xubuntu Core 20.04 - amd64 - 20200403
  SourcePackage: netplan.io
  UpgradeStatus: No upgrade log present (probably fresh install)

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