jetdirect_600n

Pulled an old HP 2100TN out of storage today and printed it’s configuration page: a very old and unused IP address and gateway was assigned.  A quick poke around the internet showed an easy way to clear the JetDirect settings: hold the CANCEL button while powering the unit on and continue holding it for ten seconds.  It will reset to DHCP and another print of the configuration will give you the IP address.