HP Color LaserJet CM4730 Multifunction Printer series - Manual (Page 307)

3. Verify that the IP address is not a duplicate address on the network by using the address resolution
protocol (arp -a) command. At the prompt, type
arp -a
. Find the IP address in the list and compare
its physical address to the hardware address that is listed on the HP Jetdirect configuration page
in the section called HP Jetdirect Configuration. If the addresses match, all network
communications are valid.
4. If you cannot verify that the MFP is communicating over the network, contact the network
administrator.
ENWW Solve network connectivity problems 291