I'm not sure if 4.3 supports it, but in 4.4 you can create a network LABEL and attach
that LABEL to the host interface, later you can add a new network and LABEL that network,
it will be automatically added to the host/interface where that LABEL is attached.
Example:
Create a LABEL named: MYLABEL
Attach "MYLABEL" LABEL to a Host interface, let's say bond0.
You will now have "MYLABEL" attached to bond0.
Create a new network, fill all the settings (VM Network, VLAN tag, etc..) but you will
also be able to choose to add a LABEL, add "MYLABEL".
After doing this the network will be automatically created on bond0.
You can automate the task of adding "MYLABEL" to bond0 on all the hosts using
the API or manually just once.