I am taking a set of snapmirror destination volumes and creating additional replication jobs to a third system. Is there an easy way to have these additional jobs kick off automatically when the initial jobs complete each night, or do they have to be scheduled separately?
As I understand you already have a SnapMirror replication configured from Cluster A to Cluster B, you now wish to configure an additional chain for the existing replication (aka cascade replication) to a third cluster (Cluster-C).
Once the new chain has been initialized you will have to setup schedules in order to copy the data across each of the links of the cascade at a defined frequency and interval of your choice.
Short answer is yes they have to be configured seperately.