def check_ipv4_duplicate(config_file):
"""
This function will:
- load a file with a configuration to be deployed to a network device
- identify the IPv4 addresses that will be configured on interfaces
- search in the DNA Center database if these IPV4 addresses are configured on any interfaces
- find if any clients are using the IPv4 addresses
- Determine if deploying the configuration file will create an IP duplicate
:param config_file: configuration file name
:return True/False
"""
# open file with the template
cli_file = open(config_file, 'r')
# read the file
cli_config = cli_file.read()
# identify the IPv4 addresses included in the config file
ipv4_address_list = utils.identify_ipv4_address(cli_config)
# get the DNA Center Auth token
dnac_token = get_dnac_jwt_token(DNAC_AUTH)
# check each address against network devices and clients database
# initialize duplicate_ip
duplicate_ip = False
for ipv4_address in ipv4_address_list:
# check against network devices interfaces
try:
device_info = check_ipv4_network_interface(ipv4_address,
dnac_token)
duplicate_ip = True
except:
pass
# check against any hosts
try:
client_info = get_client_info(ipv4_address, dnac_token)
if client_info is not None:
duplicate_ip = True
except:
pass
if duplicate_ip:
return True
else:
return False
def main():
"""
- This script will:
- load a file with a configuration to be deployed to a network device
- identify the IPv4 addresses that will be configured on interfaces
- search in the DNA Center database if these IPV4 addresses are configured on any interfaces
- find if any clients are using the IPv4 addresses
- Determine if deploying the configuration file will create an IP duplicate
"""
# configuration template file name
config_file = 'configuration_template.txt'
# open file with the template
cli_file = open(config_file, 'r')
# read the file
cli_config = cli_file.read()
print('\n The CLI template:\n')
print(cli_config)
ipv4_address_list = utils.identify_ipv4_address(cli_config)
print('\nThese valid IPv4 addresses will be configured:\n')
print(ipv4_address_list)
# get the DNA Center Auth token
dnac_token = dnac_apis.get_dnac_jwt_token(DNAC_AUTH)
print('\nThe DNA Center token is: ', dnac_token, '\n')
# check each address against network devices and clients database
# initialize duplicate_ip
duplicate_ip = False
for ipv4_address in ipv4_address_list:
# check against network devices interfaces
try:
device_info = dnac_apis.check_ipv4_network_interface(ipv4_address, dnac_token)
duplicate_ip = True
if len(device_info) == 2:
print('The IPv4 address ', ipv4_address, ' is used on this device ', device_info[0], ' interface ', device_info[1])
else:
print('The IPv4 address ', ipv4_address, ' is used on this device ', device_info[0])
except:
pass
# check against any hosts
try:
client_info = dnac_apis.get_client_info(ipv4_address, dnac_token)
if client_info is not None:
duplicate_ip = True
print('The IPv4 address ', ipv4_address, ' is used by a client')
except:
pass
if duplicate_ip:
print('\nDeploying the template ', config_file, ' will create IP duplicates')
else:
print('\nDeploying the template ', config_file, ' will not create IP duplicates')
# end of the application run
print('\n\nEnd of Application Run')
def main():
"""
This sample script will:
- validate the CLI template file name exists
- open the file
- select the IPv4 addresses to be configured on interfaces
- validate if the selected IPv4 addresses are valid IPv4 addresses
- verify if the IPv4 addresses are in use by a network device
- verify if the IPv4 addresses are in use by a client
- verify if the IPv4 addresses are reachable
- deploying the configuration file will create an IPv4 address conflict if any of the above steps fail for one IPv4 address
"""
print('\n\nStart of Application "ip_conflict_prevention.py" Run')
# define the template config file name
config_file = 'configuration_template.txt'
# enter and validate the file exists
if not os.path.isfile(config_file):
print('File not found')
# open file with the template
cli_file = open(config_file, 'r')
# read the file
cli_config = cli_file.read()
print('\nThe CLI template:\n')
print(cli_config)
ipv4_address_list = utils.identify_ipv4_address(cli_config)
print('\nThe CLI template will configure these valid IPv4 addresses:')
print(ipv4_address_list)
# get the DNA Center Auth token
dnac_token = dnac_apis.get_dnac_jwt_token(DNAC_AUTH)
# check each address against network devices and clients database
duplicate_ip = False
for ipv4_address in ipv4_address_list:
# check against network devices interfaces
device_info = dnac_apis.check_ipv4_network_interface(
ipv4_address, dnac_token)
if device_info[0] == 'Found':
duplicate_ip = True
print('\nThe IPv4 address ', ipv4_address,
' is used by this device ', device_info[1], ', ',
device_info[2])
else:
print('\nThe IPv4 address ', ipv4_address,
' is not used by any network devices')
# if IP address no used by network devices continue to check against any hosts
try:
client_info = dnac_apis.get_client_info(
ipv4_address, dnac_token)
if client_info:
duplicate_ip = True
print('The IPv4 address ', ipv4_address,
' is used by a client')
else:
print('The IPv4 address ', ipv4_address,
' is not used by a client')
# if IP address not used by a client, continue with the reachability test
reachable = utils.ping_return(ipv4_address)
if reachable == 'Success':
duplicate_ip = True
print('The IPv4 address ', ipv4_address,
' is reachable')
else:
print('The IPv4 address ', ipv4_address,
' is not reachable')
except:
pass
if duplicate_ip:
print('\nDeploying the template ', config_file,
' will create an IP address conflict')
else:
print('\nDeploying the template ', config_file,
' will not create an IP address conflict')
# end of the application run
print('\n\nEnd of Application "ip_conflict_prevention.py" Run')
