Dell Managed PDU LED - Manual (Page 191)

USER’S GUIDE
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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.