the multicastPushNeighborLimit and multicastRelayMarginDuration are set individually at each member; they are not inherited from the publisher. the defaults are 4 and 2 seconds respectively.
you can override any of the multicast parameters (including the window duration) at each peer. listen for NetStream.MulticastStream.Reset (which signals (re)attachment of a low-level multicast stream) and set/override the ones you want to change each time.
the parameters that are inherited from the publisher (but can still be overridden at each peer) are:
multicastWindowDuration
multicastAvailabilitySendToAll
multicastAvailabilityUpdatePeriod
also, if multicastPushNeighborLimit is 0, peers will inherit 0. if the publisher has a non-zero multicastPushNeighborLimit, peers will start with the default of 4.
these parameters are not inherited from the publisher, and have default initial values at each peer:
multicastFetchPeriod
multicastPushNeighborLimit (see exception/explanation above)
multicastRelayMarginDuration
