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
How to Integrate VMware, VirtualBox, Qemu Vm’s in GNS3
I like to work on physical equipment when it comes to networking, but what if I cannot afford to own one, then the only option is to Virtualise them. I have been running a virtualized environment for both for my Network POC’s and the Lab’s for years now using Gns3. Since Gns3 supports a lot of different ways you can … Read More
[Solution] You need at least 8.6GB disk space to install Ubuntu. The computer has only 2.0GB
I was working on a topology where I had to add a Ubuntu desktop client to simulate the end-user machine. I tried to install Ubuntu on the KVM hypervisor. Downloaded the Ubuntu ISO file, moved the Ubuntu-desktop ISO file to /var/lib/libvert/images folder on the KVM server I was working on. Selected network configuration and started the VM installation. There were … Read More
[Solution] GNS3 Could Not Connect | Gns3 Common Errors
GNS3 software is great. You can build most of the network labs and POC’s with it. I even build an SD-WAN lab in it. However, the problem is that it is based on opensource software, so you will get some issues here and there when you start to use it. Like any other open-source projects, you have GNS3 community forums … 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
The overlay and underlay network lab using SD-WAN
I have covered what is VXLAN and the differences between the overlay and underlay network here, in this blog we are going to take a look at the overlay and underlay in action using nuage sd-wan lab. The underlay network topology. Below is the actual underlay network, The Branch 1 NSG is connected to two WAN links both from internet … Read More
[Solution] Device Eth0 Does Not Seem To Be Present, Delaying Initialization Centos
The other day I was working on a POC lab where I had to simulate a DNS server, Centos version 7 in this case in GNS3. It was for one of the nuage sdwan gns3 labs I was working on.Took a copy of centos DNS VM from existing KVM host, added into gns3 by going to edit preferences and under … 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
