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USER’S GUIDE

Managed Rack PDU

186

Troubleshooting

Rack PDU Access Problems

Problem Solution

Unable to ping the Rack

PDU

If the Rack PDU’s Status LED is green, try to ping another node

on the same network segment as the Rack PDU. If that fails, it is

not a problem with the Rack PDU. If the Status LED is not green,

or if the ping test succeeds, perform the following checks:

• Verify all network connections.

• Verify the IP addresses of the Rack PDU and the NMS.

• If the NMS is on a different physical network (or subnetwork)

from the Rack PDU, verify the IP address of the default gateway

(or router).

• Verify the number of subnet bits for the Rack PDU’s subnet

mask.

Cannot allocate the

communications port

through a terminal program

Before you can use a terminal program to configure the Rack

PDU, you must shut down any application, service, or program

using the communications port.

Cannot access the

command line interface

through a serial connection

Make sure that you did not change the baud rate. Try 2400, 9600,

19200, or 38400.

Cannot access the

command line interface

remotely

• Make sure you are using the correct access method, Telnet or

Secure Shell (SSH). An Administrator can enable these access

methods. By default, Telnet is enabled. Enabling SSH

automatically disables Telnet.

• For SSH, the Rack PDU may be creating a host key. The Rack

PDU can take up to one minute to create the host key, and SSH

is inaccessible for that time.

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Dell Managed PDU LED Manual de usuario Pagina 191