LEGRAND PDU, User Manual, Page: 151 / 505

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Legrand PDU User Guide 151
Mode Description
None
No cascading mode is enabled. This is the
default.
Bridging
Each device in the cascading chain is
accessed with a different IP address.
Port Forwarding
Each device in the cascading chain is
accessed with the same IP address(es) but
with a different port number assigned.
For details on port numbers, see
Port
Number Syntax
(on page 153).
Tip: If selecting Port Forwarding, the Device Information page will show a list of port numbers for all
cascaded devices. Simply choose Maintenance > Device Information > Port Forwarding.
5. For the Port Forwarding mode, one to two more fields have to be configured.
Note that if either setting below is incorrectly configured, a networking issue occurs.
Field Description
Role
(available on all
cascaded devices)
Master or Slave.
This is to determine which device is the
master and which ones are slave
devices.
Downstream interface
(available on the maser
device only)
USB or ETH1, ETH2.
This is to determine which port on the
master device is connected to Slave 1.
If ETH1 or ETH2 is selected as the
downstream interface, make sure the
selected Ethernet interface is enabled.
6. (Optional) Configure the network settings by clicking the BRIDGE, ETH1, ETH2, or WIRELESS section
on the same page.
 In the Bridging mode, each cascaded device can have different network settings. You may need to
configure each device's network settings in the BRIDGE section.

In the Port Forwarding mode, all cascaded devices share the master device's network settings. You
only need to configure the master device's network settings in the ETH1, ETH2 and/or WIRELESS
section.
See
Wired Network Settings
(on page 141) or
Wireless Network Settings
(on page 144)
Tip: You can enable/configure multiple network interfaces in the Port Forwarding mode so that the
cascading chain has multiple IP addresses.
7. Click Save.
For information on accessing each cascaded device in the Port Forwarding mode, see
Port Forwarding
Examples
(on page 155).

Enable R/STP if a cascade loop is preferred:

You can "loop" a cascading chain to create network communication redundancy (Bridging mode only),
but only when your network supports
R/STP
protocol.
Make sure that your network has R/STP enabled if using a cascade loop (Bridging mode) or else network loops
may occur.