@LuckyDPR 

Address reservation is actually DHCP address reservation.  This would require the addresses being assigned to be in the DHCP pool.  This does not mean that you can't assign a static IP address to a client device that is outside of the pool but still in the subnet, just that doing that would be a manual process.  

Also to ensure you get the best help possible we recommend posting your future threads on our global community located here.  This community is actually our US-based community and the content posted here as well as the support is more geared toward US-Based products.  For customers like you, registered, outside of our region, it is recommended to use the Global Community.