Shulou(Shulou.com)06/01 Report--

1. Useful links

Model Driven Network Automation with IOS-XE

Https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2018/pdf/LTRCRT-2700.pdf

Configure NETCONF/YANG and Validate Example for Cisco IOS XE 16.x Platforms

Https://www.cisco.com/c/en/us/support/docs/storage-networking/management/200933-YANG-NETCONF-Configuration-Validation.html

Programmability Configuration Guide, Cisco IOS XE Everest 16.6.x

Https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/166/b_166_programmability_cg/configuring_yang_datamodel.html

Yang-explorer

Https://github.com/CiscoDevNet/yang-explorer

YangModels

Https://github.com/YangModels

2. Install yang-explorer

Prepare:

MAC, Linux (windows is not supported)

Python 2.7

Pip Software Manager

Browser with flash plugin (recommended chrome)

/ / pip install-- upgrade pip

/ / yum install python-virtualenv

/ / yum install graphviz

A. Change the pip source

Mkdir / .pip

Vi / .pip/pip.conf

[global]

Index-url = https://pypi.tuna.tsinghua.edu.cn/simple

[install]

Trusted-host = mirrors.aliyun.com

Yum install python2-pip python-virtualenv graphviz-y

Dependent components:

Yum install libxml2-devel libxslt-devel python-devel zlib-devel gcc git-y

Git clone https://github.com/CiscoDevNet/yang-explorer.git

B, installation

Cd yang-explorer/

Bash setup.sh

Omit.

Successfully built ydk-models-cisco-ios-xr

Installing collected packages: ydk-models-cisco-ios-xr

Successfully installed ydk-models-cisco-ios-xr-6.2.1

Installing dependencies.. Done

Setting up initial database..

Warning: Setting up database as root, this is not recommended.

Alternatively you can re-run this script as non-root

To setup database without root privilege.

Do you want to continue as root? (nbat N) y / / initialize the database

Creating data directories..

Creating database..

Operations to perform:

Synchronize unmigrated apps: staticfiles, messages, explorer

Apply all migrations: admin, contenttypes, auth, sessions

Synchronizing apps without migrations:

Creating tables...

Creating table explorer_collection

Creating table explorer_userprofile

Creating table explorer_deviceprofile

Running deferred SQL...

Installing custom SQL...

Running migrations:

Rendering model states... DONE

Applying contenttypes.0001_initial... OK

Applying auth.0001_initial... OK

Applying admin.0001_initial... OK

Applying contenttypes.0002_remove_content_type_name... OK

Applying auth.0002_alter_permission_name_max_length... OK

Applying auth.0003_alter_user_email_max_length... OK

Applying auth.0004_alter_user_username_opts... OK

Applying auth.0005_alter_user_last_login_null... OK

Applying auth.0006_require_contenttypes_0002... OK

Applying sessions.0001_initial... OK

Creating default users..

Copying default models..

Setup completed..

Use start.sh to start yang-explorer server

The installation is complete.

C. Modify the configuration file and run yang-exporer

[root@desk yang-explorer] # cd server/static/

[root@desk static] # vi YangExplorer.html

Var swfVersionStr = "16.0.0"

/ / To use express install, set to playerProductInstall.swf, otherwise the empty string.

Var xiSwfUrlStr = "expressInstall.swf"

Var flashvars = {}

Flashvars.host = & apos;192.168.0.87'; / / modify listening address and port

Flashvars.port = & apos;8088&apos

[root@desk static] # cd..

[root@desk server] # cd..

[root@desk yang-explorer] # vi start.sh

#! / usr/bin/env bash

HOST='192.168.0.87&apos

PORT='8088&apos

# set timeout value for ncclient

Export NCCLIENT_TIMEOUT=90

[root@desk yang-explorer] # ls

Default-models docs env.sh LICENSE README.md requirements.txt server setup.sh start.sh v YangExplorer

[root@desk yang-explorer] #. / start.sh

Activating virtualenv..

Starting YangExplorer server..

Use http://192.168.0.87:8088/static/YangExplorer.html

Performing system checks...

System check identified no issues (0 silenced).

July 17, 2019-15:22:46

Django version 1.8.3, using settings' server.settings&apos

Starting development server at http://192.168.0.87:8088/

Quit the server with CONTROL-C.

Open the browser:

Http://192.168.0.87:8088/static/YangExplorer.html

3. Import YangModels

Click Login

Username:guest

Password:guess

Subscript

4. Configure the XE router

XE3 (config) # netconf-yang / / main configuration

Cisco-IOS-XE-native- > native- > interface-- > GigabitEthernet name

Ip---- > address-choice

Check

XE3#sh ip inter b

Interface IP-Address OK? Method Status Protocol

GigabitEthernet1 192.168.0.29 YES DHCP up up

GigabitEthernet2 10.1.1.1 YES other administratively down down

GigabitEthernet3 unassigned YES unset administratively down down

XE3#sh ip inter b

Interface IP-Address OK? Method Status Protocol

GigabitEthernet1 192.168.0.29 YES DHCP up up

GigabitEthernet2 10.1.1.1 YES other up up

GigabitEthernet3 unassigned YES unset administratively down down

Generate a python file:

"

Netconf python example by yang-explorer (https://github.com/CiscoDevNet/yang-explorer)

Installing python dependencies:

> pip install lxml ncclient

Running script: (save as example.py)

> python example.py-a 192.168.0.29-u yoyoo-p yoyoo123-- port 830 / / method to execute python

"

Import lxml.etree as ET

From argparse import ArgumentParser

From ncclient import manager

From ncclient.operations import RPCError

Payload = ""

two

10.1.1.1

255.255.255.0

"

If _ _ name__ = & apos;__main__':

Parser = ArgumentParser (description='Usage:')

# script arguments

Parser.add_argument (& apos;-a', & apos;--host', type=str, required=True

Help= "Device IP address or Hostname")

Parser.add_argument (& apos;-u', & apos;--username', type=str, required=True

Help= "Device Username (netconf agent username)")

Parser.add_argument (& apos;-p', & apos;--password', type=str, required=True

Help= "Device Password (netconf agent password)")

Parser.add_argument (& apos;--port', type=int, default=830

Help= "Netconf agent port")

Args = parser.parse_args ()

# connect to netconf agent

With manager.connect (host=args.host

Port=args.port

Username=args.username

Password=args.password

Timeout=90

Hostkey_verify=False

Device_params= {& apos;name': & apos;csr'}) as m:

# execute netconf operation

Try:

Response = m.edit_config (target='running', config=payload) .xml

Data = ET.fromstring (response)

Except RPCError as e:

Data = e._raw

# beautify output

Print (ET.tostring (data, pretty_print=True))

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