Update the IP-Address as IP-Address; Netmask; format.

• Can we update the interface ip address as <ip address>/<netmask> instead of
• separating in primary.address and primary.netmask. 
• If so, what does the syntax look like.

 it's all software, so you can create your own levels of abstraction on top of what the model provides.

import socket

import struct 

def cidr_to_netmask(cidr):                         <<<<<

    network, net_bits = cidr.split('/')

    host_bits = 32 - int(net_bits)

    netmask = socket.inet_ntoa(struct.pack('!I', (1 << 32) - (1 << host_bits)))

    return network, netmask 

def config_interface_configurations(keys, line, interface_configurations): 

       words=line.split(",")

       ipaddr, netmask = cidr_to_netmask(words[15])               <<<<<<<<

       """Add config data to interface_configurations object."""

       # configure IPv4 loopback

       interface_configuration = interface_configurations.InterfaceConfiguration()

       primary = interface_configuration.ipv4_network.addresses.Primary()

       primary.address = ipaddr                                             <<<<<<<

       primary.netmask = netmask                                        <<<<<<<