Persistance Mirroring while upgrading from 10.2 to 11.3?

Is it possible to mirror the persistence between major code versions while upgrading? If yes, then what to configure and how will it be possible?

i never tested but according to sol7225, it may be possible because 10.x and 11.x are using the same transport protocol. however, you know, it is not officially supported.

sol7225: Transport protocol used for BIG-IP connection and persistence mirroring

additionally, there is bug 430008 which will be fixed in 11.5.0.

Bug 430008 - persist entries fail to remirror to standby after standby returns.