tap network interface

[Chris Ward]

I'm trying to test a new NIC from a virtual
machine. 

The NIC has 2 ports which are connected
by a loopback connector. These ports are available as eth0 and eth1 on
the host machine.

I have configured the guest machine
with a virtio-net interface.

The new NIC isn't the default route
from the host machine; I have another NIC for that. 

I would like to use tap networking,
as I think that should offer the best performance. I followed the instructions
at https://wiki.qemu.org/Documentation/Networking
to configure a bridge in the host, and I currently have
 -netdev tap,id=n1,br=br0 -device
virtio-net-pci,netdev=n1
in my qemu-system-x86_64 command (which
I run as root).

But this doesn't set up networking correctly
in the guest machine. I get message
W: /etc/qemu-ifup: no bridge for guest
interface found

Can anyone help me get my configuration
working ?

T J (Chris) Ward, IBM Research. Scalable Data-Centric Computing - IBM Spectrum MPI IBM United Kingdom Ltd., Hursley Park, Winchester, Hants, SO21 2JN 011-44-1962-818679 LinkedIn https://www.linkedin.com/in/tjcward/ ResearchGate https://www.researchgate.net/profile/Thomas_Ward16 IBM Research -- Data Centric Systems IBM Supercomputer Marketing IBM Branded Products IBM Branded Swag

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