...
If the incoming data exceeds the outgoing bandwidth, JetStream DR uses a replication log to temporarily cache data for replication at a later point in time after network traffic (i.e., caused by a spike in VM usage) decreases.
If the incoming data remains excessively high or the replication log hits capacity, JetStream DR applies backpressure to slow down incoming data to prevent overloading the replication log and maintain manageable data rates for reliable operation.
If backpressure limits are exceeded, JetStream DR switches to network bitmap protocol mode. This allows protected VMs to continue operation by reducing the load on the outgoing replication.
JetStream DR will periodically exit network bitmap protocol mode to check network performance condtions conditions and will return to regular replication if possible.
...
There are no specific actions required to address this alarm. However, best practices should be used to optimize ensure optimal replication traffic performance to minimize of the system which minimizes the application of backpressure or bitmap protocol mode.