ipxe windows boot issue on 2nd interface

[NiKiZe]

Did you also install windows using "net1" ?

You will probably have to check iSCSI logs, or resort to tcpdump to see if the interface keeps communicating after iPXE closes at all.
My first guess is that windows don't bring up the interface at all.

You might also want to disable "net0" during installation, and once that is completed re-enable "net1" again and see if that get's you going.
Once you/we know what is working and not, there might be a possible workaround.