Try to configure an IP address on the GNS3 router and your real switch and they’ll be able to ping each other. The cloud interface has been connected to vlan 101 on our eth1 network card.Īnd that’s it! We now succesfully connected our real switch to our GNS3 router. In the picture above I configured the GNS3 router and connected it to the cloud interface. All there is left for us to do is configure a router in GNS3 and connect it to the correct vlan. Using the 802.1Q tunnel will make sure our real switch will see the GNS3 router as being directly connected. These are the commands needed on the interface: We are going to configure fastethernet 0/1 on the breakout switch and connect it to fastethernet 0/1 to our “real” switch called “realswitch”. That’s all for the trunk connection, our next task is to connect a cable from the breakout switch to one of our real switches. GNS3 Nexus (NX-OSv) switch setup and NXOS 9000v Cisco Nexus 9000 VXLAN. We will configure an interface towards the GNS3 PC as trunk, the interfaces connected to the switches will be in different vlans where each vlan represents a different GNS3 router.Ĭonfigure the trunk connection on our breakout switch: GNS3 nodes will be discussed (such as routers, Ethernet Switches, Etherswitch Routers, Frame-Relay Switches, and more) and youll see several live examples. 2 3 0 0 0 0 Provide the switching platform for Application Centric. That’s all you have to do on your GNS3 PC, our next mission is to configure the breakout switch. Just to be sure disable and enable your interface again: Now we will create some vlans which we will use to connect the GNS3 routers to our real switches: Our next task is to enable 802.1Q support: If you are running Ubuntu or Debian you can install the vconfig utility like this: First we’ll start by configuring the trunk on the GNS3 PC and add some vlans.īreakout switch, you need one that supports QinQ. Since we have a trunk we can carry multiple vlans from our GNS3 PC to the breakout switch, every vlan is connected to a GNS3 router. This network card will be configured as a 802.1Q trunk. What we are going to do is setup our PC which is running Linux (Ubuntu) and take a network card that is not in use. If you plan to configure this for your CCIE R&S you need about 12 connections from the GNS3 routers to your real switches. This article is about the breakout switch. Use the breakout switch and setup a 802.1Q trunk from your PC to your breakout switch. In fact, it was developed by the same team and you can download it. The GNS3 Virtual Machine is simply a server packed in the form of a virtual machine. Get some quad-nic PCI network cards if you want to have plenty of interfaces. Cisco switches in GNS3, the ultimate tutorial The GNS3 VM. Get a bunch of USB network adapters and connect each GNS3 router to a dedicated USB network adapter. Having said that it’s time to combine the best of both worlds and hook up our real switches to the GNS3 routers. If you are studying for CCNP or CCIE you are better off getting some 3550’s or 3560 switches. You can use the NM-16SW module but it’s features are nothing compared to using a real switch. GNS3 is an excellent tool for routers but it lacks support of switches.
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