For example, each node involved in replication needs to monitor the health of its parter nodes, control replication activity, and the data itself must be replicated. Furthermore, the ONTAP Mediator or ONTAP Cloud Mediator needs to communicate with all nodes in order to provide quorum services and assist with failover. All of these functions have differing endpoint and port requirements.

In most cases, SnapMirror active sync replication will operate on an internal network with no port or destination-based restrictions. If IP traffic is restricted by firewalls, routers, network toplogy, or other mechanisms, the following connectivity requirements should be validated.