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
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
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
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
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
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
What is Border Gateway Protocol (BGP)? All you need to know about BGP.
Most of the network professionals whom I know are very good at configuring and fine-tuning the internal routing protocols, and when I ask them about configuring BGP, they are like, ‘you know what, I am not so confident with it maybe I think I have to read a bit more about it before I spin up in the production. So … Read More
5 Easy steps to configure Palo-Alto firewall in Gns3
When you wanted to practice Paloalto lab by yourself, you have got multiple options. You could try physical gears if you can afford one, else virtualize them. In this blog, we are going to configure the Paloalto firewall in gns3. We are going to install a Paloalto firewall with management IP and one public-facing interface with the internet. There are … Read More
(Solution) RIP not working in IOU gns3
I was working on my CCIE BGP lab the other day using Cisco IOU.While I was at it I had to advertise Loopback interfaces using Rip ver 2 so that I could create IBGP full mesh using the loopback. but it turns out, RIP was not working in my lab. This was the network topology I was working on. Testing … Read More
Arp protocol – Discover how ARP works in the real world
If you are new to networking you must have heard the term called ARP protocol – address resolution protocol many times.You may be wondering or even confused. Well, what is the ARP protocol and how ARP works in the real world? Before we talk about how arp works we need to know something called a mac address. What is a … Read More
