Course

Designing and Implementing Cisco Network Programmability
Shepherd, Jodie
Sign Out Settings Help

Table of Contents


Lab Listing

Video Playlist

Bookmarks


Glossary

Medals & Achievements

Leaderboard
Table of Contents
Back to full menu
Welcome
Silver Medal
Section 1:
Introduction to Network Programmability
Gold Medal
Section 2:
Linux Primer for Network Engineers
Bronze Medal
Section 3:
Linux Networking
Silver Medal
Section 4:
Python Foundations for Network Engineers – Part 1
Silver Medal
Section 5:
Python Foundations for Network Engineers – Part 2
Silver Medal
Section 6:
Writing and Troubleshooting Python Scripts
Bronze Medal
Section 7:
Python Libraries
Bronze Medal
Section 8:
Introduction to Network APIs and Protocols
Silver Medal
Section 9:
Cisco ASA REST API
Gold Medal
Section 10:
NX-OS Programmability
Silver Medal
Section 11:
Cisco IOS XE APIs
No Medal
Section 12:
Cisco IOS XR APIs
12.1 Introduction
12.2 IOS XR NETCONF APIs
12.3 Challenge
Gold Medal
Section 13:
Securing the Management Plane
Bronze Medal
Section 14:
YANG Data Modeling
Gold Medal
Section 15:
YANG Tools
Bronze Medal
Section 16:
Introduction to Controller Networking
Gold Medal
Section 17:
OpenDaylight
Silver Medal
Section 18:
Cisco APIC-EM
Bronze Medal
Section 19:
Cisco Application Centric Infrastructure
Bronze Medal
Section 20:
Cisco Element and Domain Managers
Gold Medal
Section 21:
Software Development Methodologies
Gold Medal
Section 22:
Introduction to DevOps
Bronze Medal
Section 23:
Version Control
Silver Medal
Section 24:
Automated Testing
Silver Medal
Section 25:
Continuous Integration
Bronze Medal
Section 26:
Configuration Management and Automation Tools
Bookmarks
Back to full menu

Cisco IOS XR APIs

Challenge

Cisco Systems, Inc.
Question 8 of 8
×
Interacting with the Cisco IOS XR NETCONF API
After testing NETCONF on IOS XE, you are the NETCONF expert in your company. The WAN backbone team needs your help automating their IOS XR devices. In this lab, you will configure an interface using NETCONF and the ncclient to ensure that they have enough knowledge to continue making interface changes as needed.

Note
All IOS XR labs for this course are using IOS-XR version 5.3.2 on IOS-XRv (xrv). API requests may diff on live hardware platforms and on other versions of IOX-XR.

Perform the following tasks to complete this challenge:

Consume NETCONF with Python

SSH to your IOS XR router and verify that you do not have a Loopback100 interface and that GigabitEthernet0/0/0/0 has no configuration other than being shut down.

Navigate to the files/module2/lab7 and execute the xr_nc_configure_ipinterface.py script.

Update the script and configure GigabitEthernet0/0/0/0 with a primary ipv4 address of 10.23.23.1/24 and secondary ipv4 address of 20.32.32.1/24.

Verify the configuration of GigabitEthernet0/0/0/0.

Note
When grading this lab please be aware that only the last task will show Red if the lab was not performed correctly.

Note
If you find that a page has become unresponsive, it’s likely being caused by the “Unlock Login Keyring” prompt. You might need to scroll down to find it. Click “Cancel” on that prompt and your ability to type on the page will be restored.

Consume NETCONF with Python
Step 1
SSH to your IOS XR router and verify that you do not have a Loopback100 interface and that GigabitEthernet0/0/0/0 has no configuration other than being shut down.

Answer
Verify that the loopback does not exist on your router and that GigabitEthernet0/0/0/0 has no configuration.

RP/0/0/CPU0:xrv# show run interface loopback100
Mon Jul 25 17:12:54.990 UTC
% No such configuration item(s)

RP/0/0/CPU0:xrv#
RP/0/0/CPU0:xrv# show run interface GigabitEthernet 0/0/0/0
Mon Jul 25 17:13:03.190 UTC
interface GigabitEthernet0/0/0/0
 shutdown
!
Step 2 Show Me
Navigate to the files/module2/lab7 and execute the xr_nc_configure_ipinterface.py script.

Note
This is a working script that adds configures a loopback100 with an IPv4 Address.

Step 3
Update the script and configure GigabitEthernet0/0/0/0 with a primary ipv4 address of 10.23.23.1/24 and secondary ipv4 address of 20.32.32.1/24.

Note
Use a get operation with the ncclient to better understand how to model the filter required to configure the interface. You may even want to manually configure the settings first to see how exactly it should be modeled in your NETCONF request!

Answer
Before looking at the solution script:

You need to understand how to model the secondary IP addresses in XML.

The simplest way to learn it is by configuring an interface with a primary and secondary IP address and then do a NETCONF get operation using the ncclient to see what the model is. It should give you enough information on how to model the configuration request.

As an added hint, the first line in the XML subtree filter should be the following:

<interface-configurations xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ifmgr-cfg">
After executing the modified script, you should see the following on the CLI:

RP/0/0/CPU0:xrv# show run interface gigabitEthernet 0/0/0/0
Mon Jul 25 15:34:29.315 UTC
interface GigabitEthernet0/0/0/0
 ipv4 address 10.23.23.1 255.255.255.0
 ipv4 address 20.32.32.1 255.255.255.0 secondary
 shutdown
!
Solution Script:

#!/usr/bin/env python

from lxml import etree
from ncclient import manager

if __name__ == "__main__":

    with manager.connect(host='xrv', port=830, username='cisco', password='cisco',
                         hostkey_verify=False, device_params={'name': 'iosxr'},
                         allow_agent=False, look_for_keys=False) as device:

        nc_filter = """
              <interface-configurations xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ifmgr-cfg">
               <interface-configuration>
               </interface-configuration>
              </interface-configurations>
        """

        nc_get_reply = device.get(('subtree', nc_filter))
        print nc_get_reply

        nc_filter = """
            <config>
             <interface-configurations xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ifmgr-cfg">
               <interface-configuration>
                <active>act</active>
                <interface-name>GigabitEthernet0/0/0/0</interface-name>
                <ipv4-network xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ipv4-io-cfg">
                 <addresses>
                  <primary>
                   <address>10.23.23.1</address>
                   <netmask>255.255.255.0</netmask>
                  </primary>
                  <secondaries>
                   <secondary>
                    <address>20.32.32.1</address>
                    <netmask>255.255.255.0</netmask>
                   </secondary>
                  </secondaries>
                 </addresses>
                </ipv4-network>
                <shutdown></shutdown>
               </interface-configuration>
              </interface-configurations>
            </config>
        """


        nc_reply = device.edit_config(target='candidate', config=nc_filter)
        print nc_reply
        device.commit()
Missing configuration for GigabitEthernet0/0/0/0

Submit
Previous Page Next Page
Terms & Conditions Privacy Statement Cookie Policy EULA Trademarks Keyboard Shortcuts
Devices
Scenario
Hints
Job Aid
This device is connected in a separate window.

Switch to Device Window

Bring the device back to this window.

Desktop Devices
Workstation
Console Devices
Internet-Rtr
xrv