underdogit got the point.
I own a Phosmart 5515 and it just doesn't respond to ARP. It is not a matter of sleeping. It doesn't respond to ARP even when it is printing from another computer in the network.
My printer is configured with static IP 192.168.1.215.
From o local PC1:
ping 192.168.1.215
-> fail: Destination Host Unreachable
arp 192.168.1.215
-> fail: no HWAddr
arp -s 192.168.1.215 my_pirinter_mac_addr
ping 192.168.1.215
-> OK. Now I can print from PC1 but not from PC2
From o local PC2:
ping 192.168.1.215
-> fail: Destination Host Unreachable
arp 192.168.1.215
-> fail: no HWAddr
arp -s 192.168.1.215 my_pirinter_mac_addr
ping 192.168.1.215
-> OK. Now I can also print from PC2
Same behaviour for Windows / Linux / Mac.
Same behaviour for wireless and wired local computers.
I upgraded to last firmware but found no differences.
The only solution I have requires making arp -s ... at every OS boot on every local computer.
Any one have a cleaner solution?