Need to make static ip for switch connected nas

I have my cloud ex 2 ultra and my problem is that we have client server network architecture in 172.16.4.x range , i want to connect my cloud to system thru switch to be accessable to all computers

But when i try to assign static ip online it stucks at updating & when i try to enter again i find it back to dhcp

Is it possible to connect my cloud directly to switch not routet !?
How to assign static 172.16.4.x ip range to it !?

Thanks in advance

Hi,

You could refer to the following link: My Cloud: Configure Static IP Address on a EX2 Ultra