![]() ![]() This is achieved by setting the VLAN ID to “All (4095)”Įnabling Promiscuous mode on the port group You will also need to ensure the port group is configured to permit all vlan’s. There is no need to add vlan’s that you intend to use with the cloud link as tagged frames passed from the GNS3 cloud to the host’s Ethernet port will be forwarded to the VMware vSwitch, as long as 8021q is enabled on the kernel detailed earlier in this post. You only need to configure a vlan at the host level for management of the VM. With many VM’s this could become annoying each time you upgrade GNS3 you need to reconfigure the networking settings on each VM □ I’m hopeful that one day the GNS3 team will prevent the networking configuration from being overwritten during upgrades. Please note, you’ll need to keep a record of your interface configuration as when you update the GNS3 VM the networking is overwritten. ![]() This approach requires a vlan be created on the VM at the host level in the below example the interfaces file on GNS3 VM was modified to create a vlan 31: sudo nano /etc/network/interfaces A single vmnic was assigned to each GNS3 VM for both management of the VM and for 802.1q traffic to the VMware vSwitch. You could use another vmnic to handle your 802.1q connections but I prefer to use a single vmnic where possible. To load it permanently so it survives reloads of the VM: sudo su -c 'echo "8021q" > /etc/modules' Load 802.1q into the kernel: sudo modprobe 8021q Enabling 802.1q on the GNS3 VMįirst install vlans on the GNS3 VM: sudo apt-get install vlan That approach doesn’t scale well, especially if your trying to emulate a complex topology with many vlans. When researching how to present multiple vlans to the GNS3 VM, I discovered some people use a vmnic per vlan. As long as your using VMware compatible network adapters 802.1q works fine with ESXi. ![]() Recently I needed this work so I thought I’d give it a go running the GNS3 VM on ESXi. From my research I believed the issue to be due to the network interface card / drivers not supporting / stripping the 802.1q vlan tags. I’ve been using the GNS3 VM on VMware Workstation for years, so far I’ve been unable to get virtual devices on the GNS3 VM to link to external networks using 802.1q. For this lab, we can use a simple static routing.įor example, on R1, you can do the following.This post details my experiences getting the GNS3 VM on ESXi to work with 802.1q. In order PC1 to communicate with PC2, you need to configure routes. On a running instance, you can view them by running show interfaces command. Note on Cisco, names of interfaces are defined by the type and slot. *Mar 1 00:02:24.067: %SYS-5-CONFIG_I: Configured from console by console *Mar 1 00:02:23.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/0, changed state to up *Mar 1 00:02:22.315: %LINK-3-UPDOWN: Interface Ethernet1/0, changed state to up *Mar 1 00:01:57.043: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up *Mar 1 00:01:56.043: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up Configure IPĮnter configuration commands, one per line. After that, you can double click on individual nodes to start a telnet session to it. In GNS3, create a new project named “Lab-1” containing:ĭouble click on “Cisco 3600” router and in the “Slots” tab add “NM-4E” in the slot 1.ĭouble click on “Cisco 7200” router and in the “Slots” tab add “PA-8E” in the slot 1.Ĭonnect PC1 (Ethernet0) with R1 (Ethernet1/0)Ĭonnect PC2 (Ethernet0) with R2 (Ethernet1/0)Ĭonnect R1 (FastEthernet0/0) and R2 (FastEthernet0/0)Ĭlick “Run” button to start the emulation. The image should be now marked as “Ready to Install”, so you can click Next to actually install. image file (should be marked as Missing)Ĭlick on “Import” button and select the downloaded image New template -> Install an appliance from the GN3 server -> Select “Cisco 3660” -> Install -> Install the appliance on your local computerĮxpand the item and click on. Install Cisco 3660 and Cisco 7200 templatesįollowing the walk-through, add templates for Cisco 3660 and Cisco 7200 routers. So, select options “Run appliances on my local computer” when asked.Ĥ. For our purposes, we can simply run everything on the host machine (no need for GNS3-VM). While the software itself is free and it can emulate various types of hardware, the licensing of actual Cisco software is a complex issue.įor this and future labs we will need Cisco 3660 and Cisco 7200 platforms and you can download and 5.bin images from Canvas (or Internet). It is available for Windows, Mac, and Linux. Go to GNS3 Webpage and download GNS3 application for your platform. The goal of this project is to install and configure GNS3 software and emulate/configure a simple network. Install Cisco 3660 and Cisco 7200 templates Lab 1: Simple Network Emulation with GNS3 ![]()
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