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Hi Stefan - 

I noticed you have these two definitions:

ext_net_bridge_ports:
  - "bond0.{{ ext_net_vlan }}"

ext_net_vlan: 705

In the first statement, the network interface for ext_net is defined as a linuxbridge, and the second implicitly indicates it is a VLAN device.  This is going to cause some ambiguity in the networking.  Another possible issue could be a loop created by OVS, brmgmt and brbond705 (this may depend on other config).

I'm guessing ext_net is for Neutron external networking, in which case you can drop the ext_net VLAN definition in Kayobe config - you'll need to define it in Neutron instead.  For Kayobe, listing ext_net in external_net_names should be enough to ensure it gets an OVS bridge attached to it.

With the two networks you have defined (mgmt_net and ext_net), the minimal setup would be:

- remove the VLAN definition for ext_net_vlan
- define ext_net as bond0.
- mgmt_net as a VLAN device tapped off bond0, eg "{{ ext_net_interface }}.{{ mgmt_net_vlan }}"

With ext_net listed in external_net_names, this will set Kayobe to attach bond0 as the external OVS port.

Note, we normally configure more logical networks than this.  What do you have for the provision_oc network, for example?

Best wishes,
Stig


> On 10 Aug 2023, at 15:24, Stefan Pinter <stefan.pinter at bearingpoint.com> wrote:
> 
> Ah, thank you for your response! I’ve seen this Bug from your link, but I use systemd-networkd (Ubuntu 22.04)
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