So, it turns out that you cannot pre-set the NIC that should netboot in virt-manager. The solution suggested is to have:
1. a global setting that says whether to assign IPs to all NICs (on managed networks) or just the PXE boot NIC
2. a per-node setting that overrides this
We will arrange for the Landscape guys to carry a custom patch until this fix is available in a package.
So, it turns out that you cannot pre-set the NIC that should netboot in virt-manager. The solution suggested is to have:
1. a global setting that says whether to assign IPs to all NICs (on managed networks) or just the PXE boot NIC
2. a per-node setting that overrides this
We will arrange for the Landscape guys to carry a custom patch until this fix is available in a package.