For the best experience with the 16.12.1b image, apply these hardware and software optimizations:
: Eliminates the overhead of graphical emulation. csr1000vucmk916121bserialqcow2 repack best
: If your host CPU usage is too high, try setting the halt_poll_ns=0 parameter on your Linux host to prevent the guest from busy-spinning. For the best experience with the 16
mkdir /opt/unetlab/addons/qemu/csr1000vng-ucmk9.16.12.1b-sdwan . csr1000vucmk916121bserialqcow2 repack best
: Allocate at least 4GB (4096MB) of RAM and 1 vCPU per instance. Lowering RAM below 3GB often results in boot loops or "Calculating SHA-1 hash" hangs.
: The hypervisor requires the disk image to be named virtioa.qcow2 : mv csr1000v-ucmk9.16.12.1b-serial.qcow2 virtioa.qcow2 .