host and vm on isolated network, there is ip (via dhcp) but not ping

[daggs]

Greetings,

I've setup an vm with openwrt in it, defined a isolated lan between the vm and the host and booted the vm up.
I see the vm is up, made sure the vnic is visible in both the host and guest and added it to the br in the guest.
I've issued an dhcpd call on the vnic (labeled vnic0) in the host and got an ip, see:
dagg at NCC-5001D ~ $ dhcpcd vnet0
DUID 00:01:00:01:23:dd:d8:5b:e0:d5:5e:d9:f2:e2
vnet0: IAID 00:10:20:bf
vnet0: rebinding lease of 192.168.1.130
vnet0: probing address 192.168.1.130/24
vnet0: soliciting an IPv6 router
vnet0: leased 192.168.1.130 for 43200 seconds
vnet0: adding route to 192.168.1.0/24
vnet0: adding default route via 192.168.1.1
forked to background, child pid 26279
dagg at NCC-5001D ~ $ ifconfig
virtsw0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 52:54:00:3e:3f:88  txqueuelen 1000  (Ethernet)
        RX packets 123098  bytes 16327962 (15.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 252 (252.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.130  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::fc54:ff:fe10:20bf  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:10:20:bf  txqueuelen 1000  (Ethernet)
        RX packets 45  bytes 8002 (7.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 39  bytes 2676 (2.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

dagg at NCC-5001D ~ $ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
^C
--- 192.168.1.1 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1018ms

the vm's xml can be found at https://pastebin.com/1gXBGcPb
virtsw0 is defined as follows:
<network connections='1'>
  <name>virtsw0</name>
  <uuid>c8eb15a3-cc5c-4bd6-8f3b-5790792ddccc</uuid>
  <bridge name='virtsw0' stp='on' delay='0'/>
  <mac address='52:54:00:3e:3f:88'/>
</network>

the os is gentoo, the versions are libvirt-6.2.0 qemu-5.0.0.
I have another server running debian 10 with the same virtsw0 definition, there the connection is working.
/var/lib/libvirt/dnsmasq/virtsw0.macs has only [] in it, can that be the issue?

Thanks,

Dagg.