Overview for ONTAP 9.8 and later
Broadcast domains are intended to group network ports that belong to the same layer 2 network. The ports in the group can then be used by a storage virtual machine (SVM) for data or management traffic.
A broadcast domain resides in an IPspace. During cluster initialization, the system creates two default broadcast domains:
The "Default" broadcast domain contains ports that are in the "Default" IPspace.
These ports are used primarily to serve data. Cluster management and node management ports are also in this broadcast domain.
The "Cluster" broadcast domain contains ports that are in the "Cluster" IPspace.
These ports are used for cluster communication and include all cluster ports from all nodes in the cluster.
The system creates additional broadcast domains in the Default IPspace when necessary. The "Default" broadcast domain contains the home-port of the management LIF, plus any other ports that have layer 2 reachability to that port. Additional broadcast domains are named "Default-1", "Default-2", and so forth.