I'm running opensuse leap 15.1 with linux kernel 5.4.11 as a Xen 4.13 Dom0/server. I set up a br0 on boot in dom0, cat /etc/sysconfig/network/ifcfg-br0 NAME='br0' BRIDGE='yes' STARTMODE='auto' BOOTPROTO='static' BRIDGE_PORTS='eno1' BRIDGE_STP='on' BRIDGE_MAXAGE='6' BRIDGE_HELLOTIME='1' BRIDGE_FORWARDDELAY='4' IPV6INIT='no' IPV6_AUTOCONF='no' IPADDR0='10.0.0.1/24' NETWORK='' BROADCAST='' REMOTE_IPADDR='' USERCONTROL='no' LINK_REQUIRED=no on boot, the bridge is up/running, ifconfig br0 br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255 inet6 fe80::ec4:7aff:fe48:9a7e prefixlen 64 scopeid 0x20<link> ether 0c:c4:7a:48:9a:7e txqueuelen 1000 (Ethernet) RX packets 1016 bytes 62007 (60.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1079 bytes 194809 (190.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 and I have net access. checking dmesg, ... [ 24.105004] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this. [ 24.115723] Bridge firewalling registered [ 24.116849] systemd-udevd[1596]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable. !! [ 24.116895] systemd-udevd[1596]: Could not generate persistent MAC address for br0: No such file or directory [ 24.171982] min_free_kbytes is not updated to 7819 because user defined value 65536 is preferred [ 24.312535] br0: port 1(eno1) entered blocking state [ 24.312536] br0: port 1(eno1) entered disabled state [ 24.312578] device eno1 entered promiscuous mode [ 29.034678] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None [ 29.034714] br0: port 1(eno1) entered blocking state [ 29.034715] br0: port 1(eno1) entered listening state [ 33.288229] br0: port 1(eno1) entered learning state [ 37.384229] br0: port 1(eno1) entered forwarding state [ 37.384244] br0: topology change detected, propagating ... reading udevd: Could not generate persistent MAC address for $name: No such file or directory #3374 https://github.com/systemd/systemd/issues/3374 i created /etc/udev/rules.d/01-net-setup-link.rules SUBSYSTEM=="net", ACTION=="add|change", ENV{INTERFACE}=="br-*", PROGRAM="/bin/sleep 0.5" but that has no effect on the dmesg systemd-udevd error -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org