Xerox 480 ST System Administration Manual page 222

NOTE
Page 17 - 4
5. Any one of these important TCP/IP parameters (if set
incorrectly) can cause TCP/IP communication problems.
Subnet Mask and Default Gateway are critical on multi-
network segment LANs or WAN's. If you make any TCP/IP
configuration changes, then the printer will reset for those
changes to take effect.
6. Go to a workstation on the same subnet as the printer. And at
a command line prompt TYPE ping xxxx.xxxx.xxxx.xxxx
(xxx.xxxx.xxxx.xxxx is the IP address of the printer). Try to
"ping" the printer using its hostname. If ping is successful
with the printer's TCP/IP address but not with its hostname,
then you may have a local workstation or NIS configuration
problem. Check the Default Gateway settings of the printer.
7. Add the printer host name to your local hosts file or NIS
database (whichever applies) and try the ping tests again.
8. Try to ping other TCP/IP nodes on your network. This will
verify the operation of your workstation's network card. Try
to "ping" the printer from another workstation. If all of the
above fails, you have a configuration problem at your local
workstation, or a network problem.
9. If Dynamic IP Addressing is enabled try "hard coding" the
printer IP address at the User Interface. Reset the printer, and
check for connectivity again with the "ping" command.
When using lpr to print jobs it is possible to set the lpr port to a port
other than the default of 515. If this occurs, it will halt all lpr
printing but printing using other protocols would still work.
10. If all of the above troubleshooting fails, you may have a
malfunctioning Network Interface.
Xerox Document Centre System Administration Guide