Using Network And Port Address Translation - Hitachi 3080 Network Administration Manual

• eth0
These interfaces use standard RJ45 connectors.
The server uses auto-negotiation for speed/duplex/flow control by default.
We recommend a 1Gbps speed for the switch uplink port for the non-file
serving interface with full duplex, bi-directional flow control enabled.
eth1
This interface is mandatory and enables users to communicate with the SMU,
any auxiliary devices and the non-file serving interfaces of other HNAS
servers. During initial setup of the HNAS server, this interface is configured
with an IP address. This interface can also be configured with a separate
cluster node IP address if the server is intended to be part of a cluster.
eth0
This interface is optional and enables the user to configure file services on
the server as well as create and configure Enterprise Virtual Servers (EVSs).
For example, when using SyncDR, the Admin EVS needs to be on eth0.
During initial setup of the HNAS server, this interface is configured with an IP
address. Connecting to the HNAS server using this IP address enables direct
access to the server management interface and provides the user with a
command line interface. See the CLI Reference manual for available
commands.
It is necessary for eth0 to be connected (and therefore in use by the Admin
EVS) for the following features:
• V2I
• VASA Provider
• Data Migrator to Cloud (DM2C)
• Using an internal SMU
Note: Remember to secure the HNAS password (the default username and
password are both 'supervisor') which is exposed when using the eth0
interface.

Using Network and Port Address Translation

In order to minimize data traffic on a public file-serving network, the server
can be located on a private management network and use Network Address
Translation (NAT) and Port Address Translation (PAT) to communicate
between the two networks. For example, an HTTP request for a device in a
private management network is made to a public network on the server's
eth0 interface, on a NAT port. The server then translates this request to the
IP address and actual HTTP port of the device on the private management
network.
20 Network interfaces
Hitachi NAS Platform Network Administration Guide