DevNet

Question 1

What are the three main parts of the yang model?

Answer 1

modular router {
namespace “https://devnet-academy.com/router”;
prefix “router”;

    container router {
          // TODO Create leaf ID and hostname
          //  TODO Create a list interface with leaf name, address, netmask, and description 
          //TODO Make sure to add a key
                list interface {
                }
            }    }

Question 2

Create a leaf list ID and Host name for router.yang

Answer 2

module router {
namespace “https://devnet-academy.com/router”;
prefix “router”;

container router {
leaf id {
type string;
}
leaf hostname {
type string;
}

Question 3

Create a list interface with leaf name, IP address, netmask, and description for router.yang. Make sure to add a key.

Answer 3

module router {
namespace “https://devnet-academy.com/router”;
prefix “router”;
container router {
// TODO Create leaf id and hostname
leaf id {
type string;
}
leaf hostname {
type string;
}
// TODO Create list interface with leaf name, ip-address, netmask and description
// TODO Make sure to add a key
list interface {
key “name”;
leaf name {
type string;
}
leaf ip-address {
type string;
}
leaf netmask {
type string;
}
leaf description {
type string;
}
}
}

Question 4

What is the header for the corresponding router.xml?

Answer 4

<?xml version=”1.0” encoding=”UTF-8”?>

<data>

</data>

Question 5

Start a Vault server in development mode (dev server).

Answer 5

vault server -dev

Question 6

steps to create vault on Docker

Answer 6

$ docker pull hashicorp/vault
$ docker images
$ docker run –name vault -p 8200:8200 hashicorp/vault:latest

Question 7

You might have to set these two environment variables. Otherwise yang2dsdl will not work.

Answer 7

$ export PYANG_XSLT_DIR=$HOME/venvs/main/share/yang/xslt
$ export PYANG_RNG_LIBDIR=$HOME/venvs/main/share/yang/schema

Question 8

Command to convert .yang file to XML format (with annotations)

Answer 8

payang -f sample-xml-skeleton –sample-xml-skeleton-annotaitons router.yang

Question 9

Yang RFC-#

Answer 9

7950

Question 10

Providing Privilege Access to Use NETCONF

Answer 10

enable
configure terminal
username name privilege level(must be 15 for NETCONF) password password
aaa new-model
aaa authentication login default local
aaa authorization exec default local
end

Question 11

Configuring NETCONF-YANG

Answer 11

enable
configure terminal
netconf-yang
netconf-yang feature candidate-datastore
exit

Question 12

Import the ncclient manager

Answer 12

Import the ncclient manager
from ncclient import manager

Question 13

using ncclient Connect to the device you want to configure

Answer 13

Connect to the device you want to configure
router = manager.connect(
host=”1.1.1.1”,
username=”developer”,
password=”C1sco12345”,
hostkey_verify=False
)

Question 14

pyang tree command

Answer 14

pyang -f tree router.yang

Question 15

validate xml file

Answer 15

yang2dsdl -v router.xml router.yang

Question 16

steps to create and validate yang model

Answer 16

1. validate shema - payng -f tree ——
2. convert .yang to xml format
3. validate .xml

Question 17

@api.route(“/network/inventory”)
class NetworkInventory(Resource):

@api.\_\_\_\_(get_inventory_parser)
def get(self):
    args = get_inventory_parser.parse_args()
    if args.\_\_\_\_\_\_\_:
        matched_inventory = {}
        for \_\_\_\_\_\_, \_\_\_\_\_ in \_\_\_\_\_.items():
            if \_\_\_.hostname in hostname:
                matched_inventory[\_\_\_\_\_\_\_] = \_\_\_\_\_\_
        return matched_inventory , 200
    elif args.\_\_\_:
        \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ = {}
        for hostname, \_\_\_\_\_\_\_\_\_\_ in inventory.\_\_\_\_():
            if \_\_\_\_.type == \_\_\_\_\_\_\_\_:
                \_\_\_\_\_\_\_\_\_\_\_[hostname] = devicetype
        return \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ , 200
    else:
        return \_\_\_\_\_\_\_\_\_ , 200

Answer 17

@api.route(“/network/inventory”)
class NetworkInventory(Resource):

@api.expect(get_inventory_parser)
def get(self):
    args = get_inventory_parser.parse_args()
    if args.hostname:
        matched_inventory = {}
        for hostname, devicetype in inventory.items():
            if args.hostname in hostname:
                matched_inventory[hostname] = devicetype
        return matched_inventory , 200
    elif args.type:
        matched_inventory = {}
        for hostname, devicetype in inventory.items():
            if args.type == devicetype:
                matched_inventory[hostname] = devicetype
        return matched_inventory , 200
    else:
        return inventory , 200