network config not working on newer libvirt
Greetings,
up until a year ago, I was running a server with Debian 10 (stable) on it with the latest
versions of libvirt, qemu and kernel 4.19.x Debian 10 had to offer (both libvirt and qemu
versions were really old).
the network config was simple, one of the vm acted as a router and provided the ip for
both the host and the vm.
I've recently switched distro and now I'm running latest stable libvirt, qemu and
kernel 5.4.x
I've tried to reinstate the network config on the new distro but I cannot get ip via
dhcp for the second vm.
if I assign manual ip and gateway, I have access to the outside world.
here are the relevant dumps:
network on the router vm:
<interface type='network'>
<mac address='52:54:00:53:1c:6b'/>
<source network='default'/>
<target dev='virtsw0-vm1'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x21'
slot='0x01' function='0x0'/>
</interface>
the other vm
<interface type='network'>
<mac address='52:54:00:5a:4c:8c'/>
<source network='default'/>
<target dev='virtsw0-vm2'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03' function='0x0'/>
</interface>
and finally:
<network connections='2'>
<name>default</name>
<uuid>61bc1a72-bd02-408a-b88e-dec696742c20</uuid>
<bridge name='virtsw0' stp='on' delay='0'/>
<mac address='52:54:00:6b:1b:92'/>
</network>
as it is possible I'm missing a kernel config, here is the output of lsmod:
vfio_pci 49152 6
vfio_virqfd 16384 1 vfio_pci
vfio_iommu_type1 32768 2
vfio 28672 16 vfio_iommu_type1,vfio_pci
ip6table_nat 16384 1
iptable_nat 16384 1
ebtables 24576 0
bridge 143360 0
stp 16384 1 bridge
llc 16384 2 bridge,stp
cfg80211 647168 0
x86_pkg_temp_thermal 20480 0
kvm_intel 237568 8
vhost_net 24576 3
vhost 36864 1 vhost_net
tap 24576 1 vhost_net
kvm 663552 1 kvm_intel
tun 53248 8 vhost_net
r8152 73728 0
nct6775 57344 0
mei_me 32768 0
hwmon_vid 20480 1 nct6775
irqbypass 16384 22 vfio_pci,kvm
mii 16384 1 r8152
mei 77824 1 mei_me
coretemp 16384 0
efivarfs 16384 1
and the .config at https://dpaste.com/9ZUCBDE9R
any ideas how to fix it?
Thanks,
Dagg.