Network QEMU

[rppouill]

Hello,

I'm contacting you because of a little problem I'm having with QEMU.

I'm PhD student and for my thesis I'm developing a simulator that includes a small raspberry computing "cluster". So I use QEMU to emulate the raspberry network, and then include them in an OpenMPI cluster.

Here is my problem: I use QEMU with the following command:

qemu-system-aarch64 -M raspi3b \

-kernel kernel8.img \

-dtb bcm2710-rpi-3-b-plus.dtb \

-drive file=2020-02-13-raspbian-buster.img,format=raw \

-append "console=ttyAMA0 root=/dev/mmcblk0p2 rw rootwait rootfstype=ext4" \

-no-reboot -nographic

And after shuffling a lot of websites, I can't get at least two raspberry to communicate (firt I try to ping raspberry A to raspberry B).

QEMU doesn't want to start up with errors like:

qemu-system-aarch64: id=net0,: drive with bus=0, unit=0 (index=0) exists

or both raspberry have a same ip address.

Do you have any ideas on how to network them?

Thank you

Best Regards

Romain POUILLARD