I have a CentOS machine but there are times I would wanted to switch from CentOS to Ubuntu, how do I do that ? You can have dual boot with both the Centos and the Ubuntu but if you wanted to switch from Centos to Ubuntu then you would have to shutdown the Centos and during the boot select Ubuntu … Read More
First Hop Redundancy Protocol – HSRP, GLBP and VRRP
Let me start off by showing some real life scenarios here, and then we would understand where do we use HSRP, GLBP and VRRP and its differences then we would fix the network. Instead of showing some labs right away. So let’s begin. We have Customer A , they are using a simple network topology as below. A router that … Read More
10 Easy steps to install CentOS 8 on VMware workstation
I have covered few blog posts in the past about installing VM’s such as Centos, Ubuntu, Windows on different hypervisors. However, installation of CentOS 8 on vmware workstation was totally different story. When the CentOS 8 came out I thought let me spin up the CentOS 8 on my VMware workstation. Guess what ?, The installation didn’t succeed. during the … Read More
How does DHCP work in the network
How does DHCP work in the network? Before we answer that question, we need to understand the different ways of configuring the IP addresses.You could use either DHCP or static IP configuration. You might already know the configuration of IP address statically on a computer. It requires you to go to the network properties of the network hosts and manually … Read More
5 Easy steps to Configure SNMP on Redhat Linux or CentOS
The other day I was working on adding some of the Redhat servers in to production for monitoring. I also got the SNMP community string from the team who is managing the monitoring tools as well. I was so confident that I even informed them that I would configure the SNMP on the server in another 5 mins :). Do … Read More
Nuage NSG bootstrapping – Activation of NSG at the branch – Part 7
Even though we have virtual Nuage NSG, let’s think for a second that we have got a brand new NSG’s at our branch locations and we are going to deploy them as Branch 1 and two like below. 🙂 Creation of NSG in an Enterprise. Different methods of bootstrapping Nuage NSG. What is Auto-bootstrapping NSG bootstrapping using auto bootstrap. Nuage … Read More
Creation of Nuage SD-WAN gateway (NSG) in VSD – Part 6
How you install the traditional network devices?A skilled technician would go on to the site to deploy the router and connect cables on them and make sure everything is working.But how to implement SD-WAN gateway? You cannot install SD-WAN gateway in our case NSG (Network Service Gateway) just like that. You would have to do a process called NSG bootstrapping … Read More
Nuage Proxy server deployment – SDWAN lab -Part 5
Yes, we are almost there to get everything up and run.! I am building this lab for you guys and at the same time, writing this post, that way I hope everything would be accurate. In this lab, we are going to install the Nuage proxy server, also known as nuage utility VM, so let’s get started. Why Nuage SD-WAN … Read More
Nokia Nuage SD-WAN Lab- Nuage VSD installation steps – Part 3
In my previous blog, I covered the underlay network setup for Nuage in KVM. In this blog, I am going to cover the Nuage VSD installation lab guide and on the next part of the blog, we would go through the installation of the nuage components one by one. What is Nuage VSD (Virtual Service Directory) Nuage VSD or Nokia … Read More
Nuage SD-WAN Controller (VSC) deployment – Part 4
In our last section of the Nuage sdwan lab setup, we had installed VSD, which is the nuage networks VNS management plane. In this section of the lab guide, we would go ahead and install a SD-WAN controller known as VSC (Virtual Service Controller.) Wha is Nuage VSC ? VSC is the Nuage SDN’s controller, which guide or inform the data … Read More
How to create Bridge and Vlan’s in Linux – Nuage SD-WAN lab Part – 2
What is the underlay and Overlay network? When it comes to Nuage-SDWAN there are two types of networks that we have to use. First one is called the underlay network and the second one is called the overlay network. The underlay network is nothing but our traditional network which would help us to connect all the network equipment. Once the … Read More
Enable SSH and basic network tools in Ubuntu
There are few features that are not available out of the box in Ubuntu. One among such feature is SSH. If you ever install Ubuntu on your machine and expect the ssh to work by default, it doesn’t. You would get an error message that says ‘The remote system refused the connection’ And for me, being from the network background I really needed … Read More
5 easy Steps to change the display resolution in Linux
When you install Redhat Linux enterprise or a CentOS on a server, by default, it takes the display resolution as 800 x 600 or 1024 x 768. Also, when you go to display settings and try to modify the display resolution, you would be disappointed to see that there are no options available to increase the display resolution either from … Read More
How to transfer files from Ubuntu to Windows?
I recently installed Ubuntu on my VMWare workstation pro, and I realized that I need to transfer some files from my windows host machine to the Ubuntu Guest OS and vice versa. There are many ways you could transfer files from linux to windows . Lets look at the simple and easiest ways to transfer files between windows and Ubuntu. … Read More
Step by Step guide to install Nuage SD-WAN lab in KVM – Part 1
You are here because you wanted to learn about Nuage SD-WAN and its lab setup. For me, I don’t like to read more of theory when it comes to learning new technologies. I would instead do a lab first and make some mistakes and learn from them. By the time I finish the lab, I would know more about the … Read More
How I have setup my GNS3 | 10 Easy steps.
I have some of my friends and colleagues who are struggling to get their GNS3 up and running with no issues. After you got everything working and the next day when you come back some error pops up. You are again back to square one trying to figure everything out from the scratch. Best way to configure GNS3 on your … Read More
Configure Cisco router as DNS servers in GNS3 – Step by step
There are many ways you could configure a DNS server. If you are a network engineer and wanted to build a private DNS server for a small office, you would rather set up a router as a DNS server than configuring a Linux or a Windows machine for the same purpose, right ? In this lab, we are going to … Read More
9 Reasons Why You Need to Use a VPN
Countries around the world are going above and beyond to protect their citizens from internet threats. One example is that in some countries, which has made it impossible for its citizens to access social media sites. And in some of the western countries, they are using the internet to invade its citizens’ privacy, it only makes sense to protect yourself … Read More
Discover the Netplan network configuration in Ubuntu
Ever since Ubuntu changed it’s network configuration to netplan from traditional configuration, many of them got so upset. Some of them are very annoyed to the point they even entirely removed the netplan and installed ifupdown back to the system again. So is Ubuntu Netplan going to stay ?, if yes shouldn’t we learn how to configure them on our … Read More
What is an ASN in BGP?- All you need to know about AS numbers
We all have configured Routing protocols and heard about the term ASN/AS numbers (Autonomous system number). However, when it comes to BGP, have you ever wondered what ASN really is and how you can get one?In this blog, let’s answer what ASN is in the BGP routing protocol, and it’s differences and types. A BGP public ASN or AS number … Read More
8 Easy steps to configure Linux (Centos, Rhel, Ubuntu) as NTP servers
If you have a Linux machine (Ubuntu, Centos, Redhat) running in your environment and you would want to configure them as an NTP server it is pretty easy. In our last blog, we took a look at what is NTP and how to configure the public and private NTP servers. In this blog, we are going to configure the Linux … Read More
4 easy step to install CentOS on KVM
CentOS is one of my favorite Linux distros, I have been using them for quite a while for my labs as well as in POC’s. If I have to do some testing in the Redhat production servers I would prefer to use Centos as an alternate as both are identical and configuration looks the same and Centos doesn’t require a … Read More
10 Easy steps to install Windows 10 on Linux KVM
I usually use the windows vm machine as a jump server inside my labs, that way I can move around the files and stuff quickly, sometimes I install the windows machine on the ESXi host else I would install it on the KVM. For some, they wanted to use windows machines on their Linux box. They can either install Vmware … Read More
[Solution] How to extend windows storage in KVM?
I have one windows machine that I use as an alternate operating system in my Linux KVM. Recently I noticed that the C drive in my windows got filled up and there is not enough space left to store any more data. How we can get around this issue? All we have to do is increase the storage on the … Read More
10 easy steps to install ubuntu 19.04 on VMware workstation 15
When you are a network engineer or a developer, you may want to test your skills in a virtual environment rather than playing with your machine or production environment. Because you never know what could go wrong. What is VMware’s workstation and Fusion? VMWare workstation pro is a Software program that would let you install different operating systems, be it … Read More
What is NTP? Configure Routers as the NTP server
What do you think is the best way for Network hosts to update its clock automatically?The answer to that is to use an NTP server, in this article lets find out what is NTP and its stratum values, and we would also configure Cisco and Comware routers as the NTP public and private servers. What is NTP Server? An NTP … Read More
Best way to Stream VLC videos on your local network
The VLC media player is great if you wanted to watch videos on your computer, tablet, or even on your smartphone. And the best part about this media software is that it not only play videos locally it also helps you play videos over the network, meaning you can make your local machine as video server and stream the videos. … Read More
Discover the difference between overlay and underlay network – Part-8
The overlay and underlay networks are quite difficult to understand at first but it is pretty easy, in this blog lets go over the differences between underlay and overlay networks also do a lab to make more sense. This is also the continuation of the nuage SD-WAN lab setup. Initially, I thought I would just install all the Nuage SD-WAN … Read More
Step by Step to Configure Cisco Router as DHCP server in GNS3
I know how does DHCP works, but what if I want to configure my router as a DHCP server as well, is it possible? the answer is YES!, You can configure the Cisco router as the DCHP server and this blog we are going to cover the same. In the last blog, I covered how we can configure the Cisco … Read More
Easy way to connect GNS3 to the Internet on Windows host
The gns3 has evolved from just a simulator for Cisco IOS to a multivendor environment.You can simulate the physical network virtually in gns3 and it works great! Wouldn’t be cool if we can get the host internet access shared to the gns3 that way the devices in gns3 can access the internet and you can do a lot more with … Read More
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