User Manual

131Rack ATS AP44xx User Manual
Troubleshooting
Rack ATS Access Problems
For problems that persist or are not described here, contact the APC by Schneider Electric Customer Care at
www.apc.com.
Problem Solution
Unable to ping the ATS If the ATS’s Status LED is green, try to ping another node on the same network
segment as the ATS. If that fails, it is not a problem with the Rack ATS. 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 ATS and the NMS.
• If the NMS is on a different physical network (or subnetwork) from the Rack
ATS, verify the IP address of the default gateway (or router).
• Verify the number of subnet bits for the Rack ATS’s subnet mask.
Cannot allocate the
communications port through a
terminal program
Before you can use a terminal program to configure the Rack ATS, you must shut
down any application, service, or program using the communications port.
Cannot access the CLI through a
serial connection
Make sure that you did not change the baud rate. Try 2400, 9600, 19200, or
38400.
Cannot access the CLI remotely • Make sure you are using the correct access method, Telnet or Secure SHell
(SSH). The Super User or an Administrator can enable these access
methods. By default, Telnet is disabled, and SSH is enabled. SSH and
Telnet can be enabled/disabled independently.
• For SSH, the Rack ATS may be creating a host key. The Rack ATS can take up
to one minute to create the host key, and SSH is inaccessible for that time.
Cannot access the Web UI • 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 ATS. This requires
https, not http, at the
beginning of the URL.
• Verify that you can ping the Rack ATS.
• Verify that you are using a Web browser supported for the Rack ATS. See “Web
User Interface” on page 73.
• If the Rack ATS has just restarted and SSL/TLS security is being set up, the
Rack ATS may be generating a server certificate. The Rack ATS can take up to
one minute to create this certificate, and the SSL/TLS server is not available
during that time.