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Zebra GK420d labelwriter not working on our main subnet

Posted on 2015-02-17
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Last Modified: 2015-02-18
We had a Zebra GK420d connected to our network for about a year and a half before it suddently went offline. I tried pinging the printer but without luck. Pinging it continiusouly I realized it actually made a reply 1-2 SOMEtimes when rebooting the printer/moving the cable to a different port on the switch, but quickly going offline again. I've trive multiple network cables and connection it to different switches on our main network.

I bought a new identical printer only to realize it had the exact same issues, so I tried moving it to another subnet and it worked completely fine! I tried connecting it to my home network and it works fine there as well!

I explained my problems to ZebraCare but was told they didn't ever have any similar problems, and since the problem is network related they cannot help me.

How can I make sure the printer isn't using a different IP-address right after responding to the one I assigned it? Can I hunt it down by it's macaddr somehow?

Any tips on how to proceed debugging this?
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Question by:Erlend Ausland
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by:Bryant Schaper
ID: 40615002
Sure, is it assigned by DHCP?  You can use ARP to find the IP/MAC.  Also could it be shutting down becuase of a duplicate IP address.

What kind of switches and routers do you have?

Or download a free IP address scanner to discover everything on network.
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by:Erlend Ausland
ID: 40615026
I can see the designated IP-address assigned in the DHCP-server, and when pinging continuously it actually does respond a couple of times (sometimes!) before "disappearing" again.

Switches are HP, routers are Cisco.

The printer is currently hooked up on a J9079A small HP switch in my office. I also have it connected through USB and tried setting a static IP through the softwares interface, however I haven't actually been able to verify wheter this setting is actually applied (based on the original problem with the printer being it isn't online when it "should" be!).

I have tried using a program called "Managed Switch Port Mapping Tool 2.42" and pointing it to the IP-address of my J9079A-switch, it indicates port 7 (which is the one the printer is currently connected to) is online, but it doesn't provide me with any more information. The other ports shows MAC etc. for connected devices, but port 7 is blank (other than registered as online..).
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Bryant Schaper earned 500 total points
ID: 40615047
does it support USB and ip at the same time?

On the cisco router you can run show arp and look for the mac, or show arp | in xxxx where xxxx is the last 4 of the mac no colon.

 on the hp you can use show mac-address and look for the mac on the port.

Do you have any additional entries in DHCP it may pickup after?
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Author Comment

by:Erlend Ausland
ID: 40615082
Your comment on wheter it supports both USB and IP on the same time or not got me thinking a little bit, and simply sending the config for DHCP/static IP to the printer doesn't actually append them (as in having the printer reboot or something like that).

So i cleaned DHCP-records for the printer, used my Zebra-tool connected via USB to set it to DHCP and then sent a "Reset printer"-command using the same Zebra-tool. This registered the printer in the DHCP, but I could not ping it.

So I statically assigned the IP address using the Zebra-tool and sent a "Reset printer"-command, THIS TIME IT ACTUALLY SEEM TO WORK!

I have now been able to ping my printer for a few minutes, but I am at home remotely working do my desktop PC so I will have to do check it on location tomorrow. This seems to probably have solved my problem, however I am still puzzled about why the DHCP function for this particular printer (different physical printers, different firmwares) troubles with DHCP.
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by:Bryant Schaper
ID: 40615105
I have seen some devices send different MAC addresses than the printed address.  Cannot say why that one is having a problem.  Does it have a firmware update.  Would probably not install if it fixes it, but could just be a bug
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