Postman can't authenticate in the SD-Access- DNAC

[Kalika]

Hi,

I have trying many times to add the DNAC as environment with Postman tool  but can't authenticate with the DNAC, even i have wrote right username and password, is it anyone had this issue before.

[Tomas de Leon]

Here is an example:

   

[Mohamed Alhenawy]

choose the type of authentication as  {Basic-Auth} also disable the ssl certificate verification 

Please read my previous article will help you a little

https://community.cisco.com/t5/networking-documents/automation-tool-quot-postman-quot-with-cisco-digital-network/ta-p/4099564

[Mike.Cifelli]

If using an off box python script this function can aide in getting the auth token.  Just call it when needed:

def get_token():
    API_URL = 'https://<dnac node>/api/system/v1/identitymgmt/token'
    AUTH = '<user>','<pass>'
    HEADER = {'content-type': 'application/json'}

    r = requests.post(url=API_URL, auth=AUTH, headers=HEADER, verify=False)

    data = r.text
    key = json.loads(data)
    token = key['Token']
    print "DNAC Auth Token"
    print token
    return token

Then in other functions to call get_token you can do something like this:

..snippet..
    data = get_token()

    API_URL = 'https://<dnac node>/dna/intent/api/v1/network-device/'
    AUTH = {
        'X-Auth-Token' : data,
        'Content-type' : 'application/json'
}

HTH!