IOS DHCP config generator.

config_dhcp.py

from ipaddress import IPv4Network,IPv4Address
def config_dhcp(dhcp_pool_name, network_address, dns_address=None,dg=None,dns=None,exclude_ips=None):
    """
    "BY DEFAULT WILL EXCLUDE THE FIRST 100 USABLE HOST IP"
    AND SUBNET'S FIRST USABLE ADDRESS AS DG
    AND THE 10th as DNS
    if not defined  : DEFAULT GATEWAY : FIRST USABLE HOST ADDRESS
                    :

    :param excluded_addresses:(min, max)
    :param dhcp_pool_name:str
    :param network_address:str
    :param dns_address:
    :param dg:
    :return: str

    """
    net_address = IPv4Network(network_address)
    if dg is None:
        dhcp_default_gateway = net_address[1]
    else:
        dhcp_default_gateway = dg

    if exclude_ips is None:
        dhcp_excluded_min = net_address[1]
        dhcp_excluded_max = net_address[10]
    else:
        dhcp_excluded_min = (IPv4Address(exclude_ips[0]))
        dhcp_excluded_max = (IPv4Address(exclude_ips[1]))
    if dns_address is None:
        dns_address = net_address[10]


    dhcp_poolname = dhcp_pool_name
    dhcp_network = net_address

    config = f"""
                   ip dhcp excluded-address {dhcp_excluded_min} {dhcp_excluded_max}
                   ip dhcp pool {dhcp_poolname}
                   network {dhcp_network.network_address} {dhcp_network.netmask}
                   default-router {dhcp_default_gateway}
                   dns address {dns_address}
                   exit
                   service dhcp
                   """

    return config





#sample=config_dhcp("V10","1.1.3.0/24",dns_address="1.1.1.2",exclude_ips=("1.1.2.10","1.1.2.11"))
#print(sample)