Anyway, here is a screenshot of my topology for this blog: There is also the option of clicking File and then Take a screenshot, but the camera icon is so much more fun. A GNS3 user can generate a screenshot of the topology of a project at any time using the camera icon: ![]() I have changed some aspects of the topology so that the configuration is not identical (what fun would that be?) but the goal is to allow traffic generated from a host in one VLAN to reach, and return from, another VLAN. I am using what is, at the time of this writing, the latest version, which is 1.2.1. The concept is the same, the Cisco commands are the same, I just want you to see it inside the wrapper of the new and improved GNS3. One of the things that is included in the body of knowledge necessary to pass the current CCNA Routing and Switching certification exam is how to configure inter-VLAN routing using a router with a trunk link (hereinafter and evermore referred to as Router-on-a-stick!) If you read my previous blog on the topic Walk softly and carry a Router-on-a-stick! (ROS), much of the material in this blog will be familiar. My goal is to demonstrate how similar it is to configure the new GNS3 if you are already used to the previous version. In this blog I will presume that you have already taken the steps to install it. In this article, we examined the GNS3 Layer 3 Switch settings, the most popular network simulator program used to prepare for Cisco exams.Have you had a chance to build some projects in the new rev of GNS3? If you have not done so yet, I would highly recommend heading over to GNS3 and downloading it. You can watch the video below to use Switch on GNS3 and also subscribe to our YouTube channel to support us! VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2ġ003 tr 101003 1500 1005 0 - srb 1 1002 Interface IP-Address OK? Method Status ProtocolįastEthernet0/0 unassigned YES unset up upįastEthernet0/1 unassigned YES unset administratively down downįastEthernet0/2 unassigned YES unset up downįastEthernet0/3 unassigned YES unset up downįastEthernet0/4 unassigned YES unset up downįastEthernet0/5 unassigned YES unset up downįastEthernet0/6 unassigned YES unset up downįastEthernet0/7 unassigned YES unset up downįastEthernet0/8 unassigned YES unset up downįastEthernet0/9 unassigned YES unset up downįastEthernet0/10 unassigned YES unset up downįastEthernet0/11 unassigned YES unset up downįastEthernet0/12 unassigned YES unset up downįastEthernet0/13 unassigned YES unset up downįastEthernet0/14 unassigned YES unset up downįastEthernet0/15 unassigned YES unset up downġ default active Fa0/0, Fa0/1, Fa0/2, Fa0/3 ![]() Please update the IOS to enable the "macro" command! Warning: You are using an old IOS image for this router. To view existing vlans use the command "show vlan-switch brief" To create vlans use the command "vlan database" from exec modeĪfter creating all desired vlans use "exit" to apply the config It has been preconfigured with hard coded speed and duplex This is a normal Router with a SW module inside (NM-16ESW) ![]() Description *** Unused for Layer2 EtherSwitch ***
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