Symptoms
All additional exclusive IP addresses assigned to OA brands are gone after reboot of the Branding node.
The node is a CentOS 7 virtual machine, hosted on Virtuozzo 7 environment.
Cause
Missing main ifcfg-eth0 file in /etc/sysconfig/network-scripts directory. This could happen if the whole network configuration was moved to Network Manager, but Odin Automation adds additional IPs as network interface aliases, which are not handled, if the main ifcfg file is missing.
Resolution
Restore /etc/sysconfig/network-scripts/ifcfg-eth0 file with default content (taken on any fresh CentOS7 environment), based on the NetworkManager configuration.
Note: the real interface name may differ from eth0, check the actual device name on the node.