What IPv4 address should be used? (CIDR subnet notation, “auto” or “none”) [default=auto]: 10.1.1.0/24
Invalid input: Not a usable IPv4 address: 10.1.1.0/24
What IPv4 address should be used? (CIDR subnet notation, “auto” or “none”) [default=auto]: 10.1.1.0/255.255.255.0
Invalid input: invalid CIDR address: 10.1.1.0/255.255.255.0
so,what is CIDR?