How routing in Data ONTAP works

You can have Data ONTAP route its own outbound packets to network interfaces. Although your storage system can have multiple network interfaces, it does not function as a router. However, it can route its outbound packets.

Data ONTAP uses two routing mechanisms:

Fast path: Routes NFS packets over UDP and routes all TCP traffic
Routing table: To route all other IP traffic, Data ONTAP uses the information available in the local routing table.

Fast path
Fast path is an alternate routing mechanism that provides some advantages over a routing table.
The routing table
The routing table contains the routes that have been established and are currently in use, as well as the default route specification. The default route entry routes to destinations that are not listed in the routing table. You can set the default route in Data ONTAP either during initial setup or by modifying the /etc/rc file.