define fixed ips for subnets

[spielkind]

I think adding an option to add subnets with a specific IP like it's possible in 'otc-shell' tools is would be good. But I'm unsure how the cmdline option/syntax should look like.

Currently there is --subnet-id or --subnet-name which can be comma-separated lists to define multiple subnets. So one option could be sth. like that:
--subnet-id xyzthisisanidxyz=192.168.0.1,yxzthisisanotheridxyz=192.168.1.1
--subnet-name mysubnet1=192.168.0.1,mysubnet2=192.168.1.1

But I think better would be to reformat the whole syntax with multiple --nic options like that:
--nic subnet-id=xyzthisisanidxyz,v4-fixed-ip=192.168.0.1 --nic subnet-name=mysubnet2,v4-fixed-ip=192.168.1.1

Comments? Solutions? =)