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[Qemu-arm] Defining a bridge

From: Jerry Stuckle
Subject: [Qemu-arm] Defining a bridge
Date: Fri, 21 Oct 2016 15:45:54 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

Hi, all,

To start out, I am a programmer, not a Linux administrator.  So please
be gentle with me - I'm in over my head here. :)

To start, my setup is: Windows 7 as the base OS with two nics, wired and
wireless (only one active at a time).  Under this I have Oracle Virtual
Machine running Ubuntu 4.4.0-38-generic (latest stable release).  I have
set up a bridge in Ubuntu's Network Manager as described on
 The bridge is defined as "bridge0" and works correctly in Ubuntu.

I start QEMU under Ubuntu with:

qemu-system-arm -m 1024M \
        -sd /export/armhf.qcow2 \
        -M vexpress-a9 \
        -cpu cortex-a9 \
        -kernel /export/boot/vmlinuz \
        -initrd /export/boot/initrd.img \
        -append "root=/dev/mmcblk0p2" \
        -device virtio-net-device,netdev=net0 \

Guest system is Debian 3.2.0-4-vexpress, again the latest stable
version.  I get a SLIRP connection just fine when I don't specify the
-device and -netdev parameters.  The "lshw" shows the driver to be
smsc911x, but I don't know how to relate that to which NIC is being
emulated (it at least works).

When I do specify the -device and -netdev parameters, I get no network.
The log shows nothing unusual other than no network device is found.

Are there any known problems with a setup like this?  If not, does
anyone have an idea as to what I am doing wrong?  I appreciate any and
all suggestions.


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