This approach also import in CCIE exams and real work. In this sense, verify, observe and understand results are much more important than configuration itself in lab study. In addition, it is the new concepts that constitutes new technology, but not the configuration details. Configuration syntax can always be Googled, but concepts and protocols are universally applicable. I particularly like using lab to understand how things work, such as protocols and concepts, which may appear abstract when first look, instead of just remembering configuration. Configure management interface IP (using Adapter 1 i.e. Shut down CSRs from GNS3 first before adding any cables.The default VM symbol is a computer, but we can change it to router symbol. Since ‘linked base’ has been configured before, we can drag and drop multiple CSR instances to use. Shut down CSR VM in VirtualBox first (it will cause error in GNS3 if not shut down the VM in VirtualBox) and then drag-n-drop CSR VM from GNS3 to use.Adapters can be modified under ‘Network’ tab – means you can add additional ports here. Edit CSR VM template in GNS3 and tick ‘Enable remote console’ under ‘General settings’ tab.For MAC ‘Preferences’ sits under ‘GNS3’ menu while it may be under ‘Edit’ menu for Windows.Select ‘linked base VM’, so that we can drag and drop multiple CSR instances based on one VM built in VirtualBox. Add the newly built CSR VM to GNS3, under GNS3 ‘Preferences’.Since Adapter 1 is configured as attached. ‘Router>’ prompt will show after installation being completed. Upon finishing the installation, CSR VM will automatically reboot.Power on the VM and CSR will be automatically installed.Enable the rest adapters but keep the settings as default ‘Not Attached’ I configured ‘Adapter 1’ as ‘Bridged’ mode for sake of obtaining DHCP. Open ‘Settings’ and configure adapters under ‘Network’.Upon finishing creation and before power on the VM, open ‘Settings’ and add the CSR ISO file (csr1000v-universalk9.03.16.01a.S.) in ‘Storage’.RAM: 2.5-4GB, I tried 2GB it worked as well. Create VM on VirtualBox with following specs:.Install GNS3 (not introduced in this post).Install VirtualBox (not introduced in this post).GNS3 (free): I am using mac v1.4.0 Download link:.CSR1000v Overview (VM requirements, evaluation license, supported features and etc.):.I will gradually translate them into English. I finished writing 4 FlexVPN labs by far, but in Chinese. It introduces how to install Cisco CSR1000v on GNS3, which provide a platform for various labs, such as DMVPN, FlexVPN, Performance routing, multicast, OTV, MPLS, VPLS and etc. This post is a brief translation of my previous post published in Chinese.
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