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I want to install qemu on macos and use a tap device in the vm. Below is my step.

  1. install qemu

    brew install qemu

  2. install tuntap, after installation, I can see tap devices in /dev/tapX

    brew install tuntap

  3. create a bridge

    sudo ifconfig bridge0 create

  4. configure ip address on bridge0

    sudo ifconfig bridge0 192.168.122.1/24

  5. sudo ifconfig bridge0 up

  6. start my qemu vm (which is centos), and log in to the vm, mannually configure the static ip address as 192.168.122.101/24, gateway is 192.168.122.1.

    sudo qemu-system-x86_64 -m 2048 -vga virtio -show-cursor -usb -device usb-tablet -drive file=centos-temp.qcow2,if=virtio -accel hvf -cpu host -net nic -net tap,ifname=tap0,script=no,downscript=no

  7. after the vm starts, I can see a tap0 in the output of ifconfig, and I add tap0 to bridge0

    sudo ifconfig bridge0 addm tap0

however, after theses steps, I can't ping 192.168.122.1 in my vm, and neither ping 192.168.122.101 in my mac host.

What am I doing wrong?

Gary Allen
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1 Answers1

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I struggled with this as well. Try the macports version of qemu instead of the one from homebrew. It includes a patch needed to get tap working properly.

Jonathan S.
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