Pull configs from CSR1000v using NAPALM

I usually use an „wr“-command-alias, an EEM-Applet or the IOS-Archive-Feature to copy the running-config to a central repository when an admin enters the „write“-command [copy running-config startup-config].

Sometimes it’s handy to pull the current running-config from a device.

Following Centralized access to device-configuration and other state-information using NAPALM – NAPALM makes this very easy:

import napalm

#credentials
DEVICE="192.168.2.139"
USER="rmond"
PASS="rmondpass"

#instanciate NAPALM
iosdriver = napalm.get_network_driver('ios')

#connect to device
router = iosdriver(hostname=DEVICE, username=USER,  password=PASS, optional_args={'port': 22, 'dest_file_system': 'bootflash:'})
router.open()

#read the hostname from the device
facts = router.get_facts()
hostname= facts["hostname"]

#read the device-config
clishowrun=['show running-config']
configRun=router.cli(clishowrun)[clishowrun[0]]

#disconnet
router.close()

#construct config-filename
filename = hostname+".cfg"

#write config-text into the file
with open(filename, "w") as f:
  print >>f, configRun