SR OS supports synchronization of usage counters that can be reported through RADIUS accounting in a dual-homed BNG scenario.
The active (SRRP master state) node keeps the total number of statistics that are reported. The active node synchronizes those statistics in regular intervals with MCS to the standby node. This way, the main copy of the total statistics is maintained on both nodes and failure cases of link, node, and so on, these statistics can be recovered from the surviving node.