[Bug 1861875] Re: VDE networking barely working

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to
another system. For this we need to know which bugs are still valid
and which could be closed already. Thus we are setting older bugs to
"Incomplete" now.

If you still think this bug report here is valid, then please switch
the state back to "New" within the next 60 days, otherwise this report
will be marked as "Expired". Or please mark it as "Fix Released" if
the problem has been solved with a newer version of QEMU already.

Thank you and sorry for the inconvenience.


** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1861875

Title:
  VDE networking barely working

Status in QEMU:
  Incomplete

Bug description:
  Running qemu with a vde_switch and slirpvde:

    vde_switch -F -sock /tmp/qemu_vde_switch -M /tmp/qemu_vde_mgmt
    slirpvde -s /tmp/qemu_vde_switch -dhcp
    qemu-system-x86_64 -m 2048 -smp 2 -serial mon:stdio -display none -vga none 
-nodefaults -accel hax -net nic,macaddr=52:54:00:0e:e0:61,model=virtio -net 
vde,sock=/tmp/qemu_vde_switch -device virtio-rng-pci -drive 
file=worker.qcow2,if=virtio -drive file=cloud-init.iso,format=raw,if=virtio

  There is some network connectivity, ping and curl work, but bigger
  transfers like apt-get update or iperf break with the following errors
  printed in the output of vde_switch:

    vde_switch: send_sockaddr port 2: No buffer space available
    vde_switch: send_sockaddr port 2: No buffer space available
    vde_switch: send_sockaddr port 2: No buffer space available

  I've tried to change the MTU size and model of the adapter inside of
  the VM, but nothing worked.

  OS: macOS 10.15.2
  qemu: 4.2.0
  vde2 (vde_switch / slirpvde): 2.3.2

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