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Changes cluster network

stop corosync and pmxcfs on all nodes

systemctl stop corosync pve-cluster

start pmxcfs in local mode on all nodes

pmxcfs -l

put correct corosync config into local pmxcfs and corosync config dir (make sure to bump the 'config_version' inside the config file)

cp correct_corosync.conf /etc/pve/corosync.conf
cp correct_corosync.conf /etc/corosync/corosync.conf

kill local pmxcfs

killall pmxcfs

start corosync and pmxcfs again

systemctl start pve-cluster corosync

check status

journalctl --since '-5min' -u pve-cluster -u corosync
pvecm status