HP VAN SDN Controller – DNS

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Overview

The HP SDN VAN Controller runs on the Ubuntu operating system. It is thus important for HP network engineers to know basic Ubuntu commands for installing and configuring the HP Controller.

Here are some basic commands that engineers may find useful.

Note: Commands in the output below are in bold and highlighted in yellow.

Changing DNS settings:

To configure DNS settings on the Ubuntu machine, do the following:

1. Open the resolv.conf file using nano or vi or another editing application of your choice:

$ sudo nano /etc/resolv.conf

2. Add DNS entries to the file (this example uses Google and OpenDNS servers:

nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 208.67.222.222
nameserver 208.67.220.220

3. Save and close the file (I am using nano in this example):

Control-X
Y to save
Enter

4. Test the DNS entries by using the following:

$ ping  www.yahoo.com
$ host yahoo.com
$ nslookup google.com



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About :

These days I am involved in some exciting SDN and OpenFlow projects involving the HP VAN SDN Controller, HP ProVision and HP Comware switches. These new developments in the networking world combine my passions of networking and application development. I hope to write some interesting blog entries on these exiting topics. I am both a Cisco CCIE #11023 and HP MASE as well as a Cisco Certified Systems Instructor (CCSI #22787) and Certified HP Instructor. I have been training networking courses for well over 10 years teaching on a wide range of topics including routing and switching, VoIP, OpenFlow and SDN. I have delivered instructor led courses all over the world. I started working with Cisco Unified Communications Manager when it was still called Cisco Call Manager and have been deploying, troubleshooting and teaching Unified Communications products since version 3.0. I have developed various network utilities such as the VPN Config Generator and others to help engineers in their day to day jobs. I also develop software, training materials, EBooks, videos and other products which are used throughout the world. I have designed, implemented and managed networks ranging from single sites to those that span 50 countries.

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