DHCP broken between B32 and B53

[TimStallard]

If a host DHCPs in B32, we don't see that DHCP discover in B53. This means if we want to PXE boot one of our GW servers (which host the DHCP server), it can't PXE boot off the DHCP server in the other building.

To test this, try PXE booting a VM with:

root@vms-b53-1:~# incus launch --vm --config security.csm=true --config security.secureboot=false tdstest --empty --console

And check on the GW servers with:

root@gw-b53:~# tcpdump -i sown -nvvepc100 port 67

I think this is likely isolutions filtering DHCP on our VLAN between buildings?