IBM RS/6000 7043 43P Series Service Manual page 181

If any of the addresses is incomplete or contains a number other than 0 to 255, an
error message is displayed when you select the Save icon. To clear this error,
change the improper address and select Save again.
The Ping icon allows you to confirm that a specified address is valid by sending a
test transmission to that address.
After choosing the Ping option, you are asked to indicate which communications
adapter (Token Ring or Ethernet) should be used to send the test transmission.
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Chapter 7. System Management Services