I have a SonicWall NSA 220. I inherited the current network ip scheme of 10.30.5.x/255.255.255.0
Our office is expanding and I need more IP address availability. I would like to also segregate some items, such as IP phones to their own segment.
Can I simply change the netmask to 255.255.0.0? And then start using 10.30.10.x addresses for the phones? The SonicWall currently handles DHCP but DNS is on a couple 10.30.5.x domain controllers.