The BIG-IP system does not support changing the traffic group or a router
and/or virtual server. MRF stores state that has a different lifetime than a connection in an
internal in-memory database (known as session db). This includes persistence tables (SIP LB),
call tables (SIP ALG), and registrations tables (SIP ALG), etc. Records stored in session db
are auto replicated between the active and standby device. Part of the key for each entry in
the session db is the identifier for a traffic-group. If the traffic-group of a virtual and/or
router instance is changed all data stored in session db will be orphaned.