VMs as real hosts on the same network

Hello,

I am trying out VMM on an OpenBSD 6.4 server which has the following network interfaces defined:

[bnx0]+[bnx1]-->[trunk0]-->[vlan2]
[bnx0]+[bnx1]-->[trunk0]-->[vlan6]-->[bridge6]

The vlan2 is for the internal (management) network and vlan6 for the public (internet) network. I manage my server from vlan2 and would like to have my virtual machines on vlan6 which uses public IP addresses. For that purpose I have setup my /etc/hostname.* files as such:

hostname.bnx0 + hostname.bnx1:
up

hostname.trunk0:
trunkproto failover trunkport bnx0 trunkport bnx1 up

hostname.vlan2:
inet 192.168.1.5 255.255.255.0 192.168.1.255 vnetid 2 parent trunk0 description "private"

hostname.vlan6:
vnetid 6 parent trunk0 description "public" up

hostname.bridge6:
add vlan6

I am actually using Option 4 from the Networking chapter in the virtualization FAQ (https://www.openbsd.org/faq/faq16.html) just that my setup has a redundant link (trunk0) and a VLAN (vlan6). So in theory that should work but unfortunately when I start a VM to install OpenBSD 6.4 from the bsd.rd boot file I do not have any network connectivity. I tried with DHCP first and in that case on the DHCP server I see the DHCPDISCOVER and DHCPOFFER requests/answer but there is never a DHCPACK. Then I tried assigning a static IP directly but still no network connectivity. I can't ping the default gateway of that public network. Checking with tcpdump on the firewall I can see the ARP who-has request and the ARP reply back the the VM but again it seems like the VM does not get it.

Here is my vm.conf conf file:

switch "uplink_vlan6" {
interface bridge6
}

vm "example" {
disable
memory 2G
boot "/home/admin/bsd.rd"
disk "/var/vmm/example.qcow2"

interface {
switch "uplink_vlan6"
lladdr fe:e1:bb:01:01:01
}
}

I have also totally disabled pf on that OpenBSD VMM server but that did not change anything (I am using the default pf.conf from the installation)

Any ideas what I might be doing wrong or forgetting?

Regards,
Mabi