The "id=..." is only the QEMU-internal name of the netdev, not the name of the tap device. So this is not a bug --> closing this ticket.
** Changed in: qemu Status: New => Invalid -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/589827 Title: QEMU netdev tap type id name is not used on linux host Status in QEMU: Invalid Bug description: Tested with 0.12.3, 0.12.4, and latest git as of 4 jun 2010. The new -netdev type seems to ignore manual specifications of tap ifname. qemu-system-x86_64 -hda disk.img -netdev tap,id=ids_e0 -device e1000,netdev=ids_e0 **creates tap0 instead of ids_e0. tap0 passes traffic, ids_e0 doesn't exist (I tried -netdev type=tap as well for brevity) QEMU creates a tap0 (or appropriate) interface and does not name this "ids_e0" as would be expected. I also tried 'pre' creating the tap interface. Previous alterantive was qemu-system-x86_64 -hda disk.img -net nic,model=e1000,vlan=99 -net tap,ifname=ids_e0,vlan=99 **creates ids_e0 as expected, and passes traffic as expected. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/589827/+subscriptions