RE: "Your network is probably not using DHCP protocol" during ubuntu install on qemu virtual machine

[ckim]

 

Hi, qemu experts and users,

I tried the same install procedure below in my main ubuntu 20.04 machine (intel).

And this time the DHCP network setting is successful. (I remember last time it had no problem hence I’m doing experiments there..)

The dhcp setting problem during ubuntu install occurs only when I do it on my arm64 machine, ubuntu-20.04.

So problem is at the host side. Regarding dhcp, I checked both machines had isc-dhcp-client, isc-dhcp-common packages installed, though they don’t seem relevant.

What could make this difference?

Any suggestion will be deeply appreciated. (I need to use this kvm mode in arm64 machine because it’s much faster).

Thank you! And have nice weekend!

Chan Kim

 

From: ckim@etri.re.kr <ckim@etri.re.kr>
Sent: Thursday, September 30, 2021 10:10 PM
To: 'qemu-discuss' <qemu-discuss@nongnu.org>
Subject: "Your network is probably not using DHCP protocol" during ubuntu install on qemu virtual machine

 

Hello, all

I’m install ubuntu 20.04 on an arm64 virtual machine using qemu-5.1.0. (host is also ubuntu 20.04, am64 machine)

The final command is below. (the LD_LIBRARY_PATH setting was needed for sudo)

sudo LD_LIBRARY_PATH=/home/ckim/prj/abdsn/ab21sim/axpusim/build ./qemu-system-aarch64 -nographic -machine ab21q,gic-version=max -m 512M -cpu max -smp 4 \

-netdev user,id=vnet,hostfwd=:127.0.0.1:0-:22 -device virtio-net-pci,netdev=vnet \

-drive file=ab21q-ubuntu-20.04-image.img,if=none,id=drive0,cache=writeback -device virtio-blk,drive=drive0,bootindex=0 \

-drive file=ubuntu-20.04-mini.iso,if=none,id=drive1,cache=writeback -device virtio-blk,drive=drive1,bootindex=1 \

-drive file=flash0.img,format=raw,if=pflash -drive file=flash1.img,format=raw,if=pflash --enable-kvm

 

I’ve done this before (on intel ubuntu 20.04 machine) with no problem, but this time, I get this message. (I’m not sure I had this before too).

“Your network is probably not using DHCP protocol. Alternatively, the DHCP server may be slow or some network hardware is not working properly.”

 

My host’s network is working properly. What can I do?

I’m doing this remote from home and I can set my host to use DHCP and to use DHCP-given IP address tomorrow if needed. Should I do this? Or should I install DHCP server on the host?

Thank you!

 

Chan Kim