GNS3 2.0 Architecture and schema Part 2: Emulators and virtualization

Key Takeaways

[Music] now one of the advantages of having this segregated or separated architecture is that multiple genus three clients can interact with the controller so multiple clients can control a gns3 instance in the documentation for version 2. Z of Jus 3 new features are listed and one of them is that multiple users can be connected to the same project so multiple users can connect to the same project and see changes in real time and collaborate on a gus3 network what's also very cool is that when you open the console to a router you'll see the commands sent by other users so we have a segregation or separation of the graphical user interface with the server component I'll demonstrate those kind of features in separate videos now what is an emulator we've got qmu IOU and dynamips dynamips is probably the most well-known because it's been around the longest what I'll do here is add some rers to the topology this router rer one is using a c37 instance and rouer 2 is using a c37 VM instance now in my GS3 project what you'll notice is I'm running multiple servers I'm running a local server as well as a gns3 VM dynamips is an emulator in other words it allows you to mimic Hardware in the same way that VMware allows you to run a Windows server on a Mac or Linux on Windows a VMware is a hypervisor that emulates a Windows PC so this Windows installation which I'll boot up in a moment believes that it's running on Windows Hardware whereas an actual fact it's running in an emulated or virtual environment in the same way my Cisco iOS image this is a real Cisco iOS image is running on a dynamips emulation in this case it's running locally using a local install of dynamips on my Mac whereas this router the c37 25 hyphen VM is running on the js3 VM so in this example I'm running the js3 VM within VMware Fusion so I've got my Hardware device which is a Mac I've got VMware Fusion installed on my Mac operating system and I'm running the gns3 VM which is running a version of Linux on my Mac but inside the gns 3vm dynamips is emulating a rou hardware platform this is called nested virtualization in other words you nesting one virtualization technology within another I'll start up these devices actually so we can see what happens notice in this examp example that my Windows PC boots up because it's part of the genus 3 topology so my Windows 10 operating system is running in a virtual environment on my Mac in other words it's virtualized using virtualization technology in this case VMware Fusion in the same way I'm running Linux within VMware Fusion on my Mac and inside the genus 3 VM I'm running multiple emulators so the controller process and the compute server processes are running in this example on the same virtual machine and they are launching various emulators in my example I've got qmu which allows me to run emulated Hardware to support Cisco iosv as well as Cisco iosv layer 2 devices I've got dynamips running within the gns3 VM which allows me to ulate a cisa router running a real cisa iOS so notice here I've got a local process and I've got a gns3 VM process but my gns3 VM is running multiple processes internally and multiple emulators to allow me to support different devices now once again this is very similar to me running VM workstation within VM Fusion so in this example once again I'm running a Mac with Mac OS Sierra so that's my operating system running on physical Hardware I've got a VMware Fusion which provides virtualization technology I'm running Windows 10 within VMware fusion and what I could do here is start up a VM within VMware Workstation running within Fusion that is called nested virtualization now it's not necessarily always a good idea to do this because you can slow things down but what I could do is run genus 3 within my Windows PC which contacts the genus 3 VM running on VMware Workstation within Windows within VMware fusion and within this genus 3 VM I could run an emulation software dynamips that allows me to run real Cisco iOS routers in my network topology now I'm not recommending that you do that I'm simply showing you that you can run nested virtualization within nested virtualization so here I've got Cisco iOS images running within dynamips running within VMware Workstation running within VMware Fusion so let's close that down because we don't actually need that but back on my Mac you can see that I'm running dynamips as a process on my Mac directly that supports this router once again which is running on a local install of dynamips but this router is running on dynamips which is running on the gns3 VM within VM Fusion so to summarize we have a gns3 guey that is the interface that we interact with in the future we may have a web- based interface to the controller the controller can connect to multiple computer servers or they could all run within the same gns3 VM these Kickstart various emulators such as qmu which is the emulator used for iOS V layer 2 and various other appliances that you can get from the gns3 marketplace we have the IOU emulator and the dynamips emulator so which is the best the best today is to run cumu I hope you enjoyed the video if it was of benefit to you please like it and please subscribe to my YouTube channel I wish you all the very [Music] best