I want to change the subnetmask on my cisco RV345 router.
For the moment, it looks like this: IPv4 192.168.1.1/24 --> subnetmask 255.255.255.0
I want to change it to: 192.168.1.1/22 --> subnetmask 255.255.252.0
It looks like it's not possible for a private network class C?
See screenshot.
Thanks