Yes i have one forgot to put it in.
I don't know what it does but it works 
To disable IPv4
configure
set system offload ipv4 pppoe disable
set system offload ipv4 vlan disable
set system offload ipv4 forwarding disable
commit
save
exit
To enable IPv4 forwarding:
configure
set system offload ipv4 forwarding enable
commit
save
exit