LEGRAND 1U, User Manual

Page: 520 / 543

Janu
ary 201
9
520 Legrand PDU User Guide
Symptom Probable cause
Failure to access a slave device

One of the following issues occurs on the master device:
 Network connection is lost.
 Power is lost.
 The Ethernet or wireless interface is disabled.

One of the following issues occurs on the slave device in
question or any upstream device (if available):
 Connection of the cascading cable is loose or lost.
 No power supply.
 The cascading mode is set incorrectly.
For example, the master device is set to Bridging, but
the slave device in question or any upstream device
is set to Port Forwarding.

In the Bridging mode, IPv4 (or IPv6) settings are disabled
on the slave device in question.

In the Port Forwarding mode, one of the following issues
occurs:
 The master device's role is incorrectly set to 'Slave'.
 The master device's downstream interface is
incorrectly set. For example, you use a USB cable to
connect the 1st slave device, but select the Ethernet
port as the downstream interface.

The role of the slave device in question or any
upstream device is set to 'Master' instead of 'Slave'.

The port number you added to the IP address is
incorrect. See
Port Number Syntax
(on page 168).

IPv4 (or IPv6) settings are disabled on the master
device.

The slave device in question or any upstream device is a
Raritan product that runs a "pre-3.3.10" firmware version
while the rest of the chain runs firmware version 3.3.10 or
later.
Tip: To determine which Legrand PDU may be the failure point of network, you may ping each Legrand PDU
in the cascading chain, or check the slave-related events in the event log of each Legrand PDU. See
The
Ping Tool (on page 521) and Slave Device Events in the Log (on page 520).

For a cascading chain comprising dual-Ethernet-ports PDUs, also check the following:

Whether the Ethernet interface (ETH1 or ETH2) where the network or cascading cable is connected is
disabled on the cascaded device in question or any upstream device.

Whether the connection complies with the cascading guidelines, when set to the Port Forwarding mode.
See
Restrictions of Port-Forwarding Connections
(on page 38).

Whether a newer PDU model, if involved, runs the appropriate minimum firmware version or later. For
example, PXC must run 3.5.0 or later, and Legrand PDUs must run 3.4.11 or later.