There may be times when a replication task fails due to connectivity/network failure between the source and target hosts.
In cases like this it may be necessary to manually roll back any changes that were made prior to the network failure before resuming replication.
As data is sent to the destination host (via the VA), blocks in the destination disk are written to the undo file on the VA before they are overwritten by the changed data. If replication fails and an undo becomes necessary, then the original destination disk blocks are read from the undo file and written to the destination disk to rollback the failed replication. This is a key function designed to provide resiliency in the face of a network failure; if there is a network failure during the replication pass, the destination VM is not corrupted by incomplete data.
After network connectivity has been restored, perform the following:
For VA Network Replications:
For VA HotAdd Replications: