How to resolve destination host unreachable on time-clock?

Posted on 2011-10-06
Last Modified: 2012-05-12
Hello experts,

Hopefully someone can help me out with this.  We have 2 time clocks at the company that I work at and today one of them decided not to work.  Each time clock has its own IP address.  The one that works is: "" and the one that does not work is:  "".  There are no other devices that I am aware of that are currently using that IP address.  (although is there a way that I can check this easily so I know for sure?)  Most computers are static IP in the building.  When I ping the working one, it gives me the normal and functioning replies, but the one that isn't working right gives a reply but then right next to the reply it says "destination host unreachable".  I've checked the physical connections and everything checks out fine.  Can someone please help me with this?  Thanks in advance.
Question by:Brent Johnson
    LVL 22

    Accepted Solution

    Try this:

    Take the time clock at offline.  Now ping that address, and see if anything responds.  If it does, there is another device on the LAN that has been given the same static IP address, and the two devices are interfering with each other's network traffic.

    I use the Angry IP Scanner frequently for jobs like this.  It can scan an entire LAN over a specified address range, and report what addresses respond.
    LVL 2

    Assisted Solution

    if it's not a case of conflicting IPs as above you will have to troubleshoot by changing the patch cable or the ethernet port on the wall. Easiest-just move the clock to another port.

    Still no luck, see if you can get into the configuration and change the IP.  If still no luck after all that, the onboard ethernet has gone out.

    Author Closing Comment

    by:Brent Johnson
    Thanks for the help!  The end result of this was that the port in the switch room was not patched at all.  Someone must have unplugged it from the switch.  When I took the time clock offline, I was not able to ping the address, so I knew it had to be either something on the timeclock itself, or something related to the switch that it gets plugged into.  I also saw that the link light on the timeclock's circuit board was not on and the other timeclock, it was on.  Sure enough, the port wasn't patched to the switch in the switch room.  I installed a patch cable from the port to the switch and it instantly fixed it.  Thanks again guys!

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