Hi everyone!
It is necessary that at the start of the accounting mikrotik it sends the Filter-Id attribute to the radius. At the moment, he does this at the end of the accounting.
It is necessary for the mikrotik to send the Delegated-IPv6-Prefix to the radius.
Usually, in the first seconds it is already known which delegated prefix was issued to the subscriber.
It makes sense to make a delay in accounting for 5 seconds and already report all the attributes to the radius. Or, with periodic updates, inform this attribute too