Just wanted to document this here so it may help someone in the future.\n\nA JetDirect J3113A (600N) with older 7.something firmware would not\nupgrade to the latest version with HP Download Manager. It would start,\nbut then just sit there forever with the progress bar about 10% done.\nWeb JetAdmin took twenty minutes to install, then failed to start.\n\nThe 600N refused FTP connection attempts, so that method was out.\nftp-config:1 was not a recognized command. I have no idea how FTP was\ndisabled on it.\n\nTFTP connections were recognized but always timed out.\n\nThis message showed the way:\n\n[URL]http://forums13.itrc.hp.com/service/forums/bizsupport/questionanswer.do?admit=109447627+1252765569272+28353475&threadId=575662[/URL]\n\nHP Download Manager apparently uses TFTP to send the firmware. But, as\nBob Roell says in the link above:\n\n"2. Make sure the network port matches the JD's speed/duplex setting.\nTFTP does not handle excessive packet loss very well."\n\nAha! Old Ethernet stuff, autonegotiation, maybe a duplex mismatch?\n\nConnecting the upgrading computer and the 600N to a newer switch solved\nthe problem. If that didn't work, I would have used a crossover cable\nto connect the computer and printer directly.