SatLink VSAT User Guide
Publication no. 101557
Copyright © 2009 – STM Group, Inc.
Page 146 (160)
K.2 Debugging network connections
Ping is a useful tool to debug network connections.
A ping test can be done from a PC connected to the Ethernet port of the STM SatLink VSAT (e.g. from
Microsoft command prompt).
Use the following commands:
1. Ping the Ethernet interface IP address of the STM SatLink VSAT (e.g. 10.10.20.1). If not OK
please check the Ethernet cable and the connection to the SatLink VSAT.
For SatLink 1900 and 1901 only: Check that the VSAT’s Ethernet port is operating in the correct
mode. The switch should be set to HUB for direct PC to STM SatLink VSAT connections using a
straight Ethernet cable.
2. If the Ethernet connection is OK then check the IP configuration and routing table of the PC (e.g.
type the MS-DOS commands ipconfig
and route print) and check the IP configuration of the
STM SatLink VSAT (use the CLI command
ip show).
3. If the ping to the SatLink VSAT is successful, try to ping a known Internet address (e.g.
www.google.com). If successful the connection to Internet is OK.
If not OK check that the PC DNS IP address is correct. Try also to ping a known IP address on
the Internet, e.g. ping 195.204.181.169.
4. If none of the above solves the problem the System Operator must be contacted.
The following commands may also be useful:
• ping –t <ipaddr> start a continuous ping test towards the specified IP address in order to gather
statistics
• use ctrl-break to read statistics during test (This option is not supported by all Windows operating
systems)
• use ctrl-c to stop the test
K.3 Manual software upgrade or dload fails
Manual software upgrade or download of file using CLI command dload can fail if there is not
sufficient available memory in the STM SatLink VSAT file system. This can happen if several software
images have been downloaded to the VSAT without deleting the older backup images.
The STM SatLink VSAT file directory normally contains two application files in addition to the smaller
configuration and log files, namely:
• Satlink-vsat2.tgz (For SL2000)
• dvb-rcst.tgz
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The current DVB-RCS application
• xxx.bak The back-up DVB-RCS application
To view the STM SatLink VSAT file directory, type the CLI command
dir. There should not be more
than the above listed application files.
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The name may differ, but the extension will be “tgz”.
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