The DANOS virtual router ISO only supports KVM, VMware or on a bare metal x86 system with supported NICs. It does not support VirtualBoxhas some support for support for VirtualBox for demonstrations and training with the latest virtio-net Adapter-type (see the How-To Installing DANOS on Virtual Box after reviewing this wiki page_.
The virtual machine host must support Supplemental Streaming SIMD Extensions 3 (SSSE3). You can run the command grep ssse3 /proc/cpuinfo on the host machine to check for support for the feature.
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