Oh this took my breath away. The stinking update
trashed my bridge and took out all my qemu-kvm
virtual machines
My notes on how to restore br0:
How to add or restore a bridge (br0) when knocked out by an upgrade:
Reference:
https://www.thegeeksearch.com/how-to-configure-network-bridge-in-centos-rhel-7-using-nmcli-command/
# nmcli con show
3: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel
state DOWN mode DEFAULT group default qlen 1000
link/ether ac:1f:6b:62:10:06 brd ff:ff:ff:ff:ff:ff
altname enp0s31f6
# nmcli con add type bridge con-name br0 ifname br0
Connection 'br0' (1ec4bd21-d652-40cf-8de9-392e35ce7445) successfully added.
# nmcli con add type bridge-slave con-name br0-port1 ifname enp0s31f6
master br0
Connection 'br0-port1' (e5c19095-d8a8-4f76-a8bd-fa8b11d19218)
successfully added.
Note: enp0s31f6 is the "altname" from `nmcli con show`
# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.fe627ffe1fdf yes
virbr0 8000.52540085fab2 yes
# systemctl restart systemd-networkd.service;
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