June 2018
32 Legrand PDU User Guide
Cascading Multiple Legrand PDUs for Sharing Ethernet
Connectivity
You can have multiple Legrand PDUs share one Ethernet connection by cascading them via one of the
interfaces below:
USB interface
Ethernet interface
The first one in the cascading chain is the master device and all the other are slave devices. Only the master
device is physically connected to the LAN -- wired or wireless.
Each device in the chain is accessible over the network, with the Bridging or Port-Forwarding cascading
mode activated on the master device. See Setting the Cascading Mode (on page 150).
Bridging: Each devi
ce in the ca
scading 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.
Basic cascading restrictions:
All Legrand PDUs in the chain must run compatible firmware versions, which are 3.4.11 or later.
The cascading mode of all devices in the chain must be the same.
In the Bridging mode, the master device can have "only one" connection to the network. DO NOT
connect both Ethernet ports to the network(s) unless your network has the R/STP protocol enabled.
Note: The Port Forwarding mode does NOT have this restriction. In this mode, you can enable two wired
and one wireless network connections.
Do NOT connect slave devices to the LAN or WLAN.
(WIFI only) You must use Raritan's USB WIFI wireless LAN adapter instead of other WIFI adapters for
wireless network connection.
Troubleshooting:
When a networking issue occurs, check the cascading connection and/or software settings of all devices in
the chain. See Cascading Troubleshooting (on page 482).
Online Casca
ding Guide:
For detailed information on the cascading configuration and restrictions, refer to the Cascading Guide, which
is available from the Legrand PDU section of Raritan website's Support page
(http://www.raritan.com/support/).
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