Finally got opportunity to reboot nodes - after reboot I lost connection between nodes partially:
Still external IP in the members file....
# cat /etc/pve/.members
{
"nodename": "pm2-bne2",
"version": 3,
"cluster": { "name": "ING-FOREST", "version": 25, "nodes": 2, "quorate": 0 },
"nodelist"...