This could be done via SSH/CLI command:
CacheFlow#(config) interface adapter_number:interface_number
CacheFlow#(config interface adapter_number:interface_number) ip-address ip-address [subnet mask for IPV4 or prefix length for IPV6]
Note: You could assign an Ipv4 and IPv6 on Cacheflow Interface. The maximum number of addresses you can add per family is 64; you can assign 64 IPv4 and 64 IPv6 addresses to an interface for a total of 128 addresses.