Guest VMs have no access to host-network or external servers

Software environment

  • Operating system: Ubuntu Jammy Jellyfish LTS
  • Architecture: x86
  • kernel version: Linux 5.15.0-1028-aws x86_64
  • libvirt version: 8.0.0
  • Hypervisor and version: KVM 1:6.2+dfsg-2ubuntu6.6

Description of problem

Guest Vms have no access to networks other than their own.

Steps to reproduce

  1. Installed Cloudstack host (advanced networking) on a ec2 Baremetal instance.
  2. Connected the secondary storage to the management host -> cloudstack starts system VMs.
  3. None of the system VMs can ping it's host or any other server outside it's own network.
  4. The bridge configuration is correct according to the maintainers. AWS Support says the subnet config on ec2 is correct too.

Additional information

s-25-VM.log I am quite new to libvirt, so it might be my fault that I don't find a main logfile in the /var/log/libvirt/ directory Appart from that sudo virt-admin daemon-log-outputsgives me Logging outputs: 3:journald

Network conf of the guest VM that fails to connect anywhere: vm.conf

While this network config is working on the host ec2 instance: host.conf

Please let me know what more information I can provide! I am very thankful for any help!