Hitachi 3080 Network Administration Manual page 22

Using an Aggregate Linux interface (instead of eth0 or eth1) provides a
potentially faster route for data and management traffic. It also enables the
non-file serving interfaces (eth0 and eth1) and the file serving aggregations
to be physically separate while providing Linux access to both sets of
interfaces.
Example
For the scenario below:
22 Network interfaces
Hitachi NAS Platform Network Administration Guide