Owners manual
101Rack Power Filter: Troubleshooting
Troubleshooting
Rack Power Filter Access Problems
Problem Solution
Unable to ping the Rack Power
Filter
If the Rack Power Filter’s Status LED is green, try to ping another node on the
same network segment as the Rack Power Filter. If that fails, it is not a problem
with the Rack Power Filter. 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 Power Filter and the NMS.
• If the NMS is on a different physical network (or subnetwork) from the Rack
Power Filter, verify the IP address of the default gateway (or router).
• Verify the number of subnet bits for the Rack Power Filter’s subnet mask.
Cannot allocate the
communications port through a
terminal program
Before you can use a terminal program to configure the Rack Power Filter, 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 Power Filter may be creating a host key. The Rack Power
Filter can take up to one minute to create the host key, and SSH is inaccessible for
that time.
Cannot access the Web interface • Verify that HTTP or HTTPS access is enabled.
• Make sure you are specifying the correct URL — one that is consistent with the
security system used by the Rack Power Filter. SSL requires https, not http, at
the beginning of the URL.
• Verify that you can ping the Rack Power Filter.
• Verify that you are using a Web browser supported for the Rack Power Filter. See
“Supported Web Browsers” on page 37.
• If the Rack Power Filter has just restarted and SSL security is being set up, the
Rack Power Filter may be generating a server certificate. The Rack Power Filter
can take up to one minute to create this certificate, and the SSL server is not
available during that time.