Frequently dropped connection

By monton
Apr 5, 2007
  1. I have a frustrating problem with my small network. I have frequent interruptions in connection. The icon in the task bar says: Status: Connected but I can't connect to anything. I am using ComCast cable as my provider, a Netgear RP614 router, a D-link 24 port gigabit smart switch with 6 and sometimes 8 computers connected. They all suffer frequent loss of connectivity. Usually I can reconnect by doing a "repair" even though the ARP cache doesn't clear.
    Most of the time I reconnect by using the command line
    ipconfig /release

    ipconfig /renew

    After several seconds I am happily connected. Unfortunately my connection may only last a few minutes.
    It seems that the connection is dropped randomly among the computers with some connected some not etc.

    I have no idea what is going. Any suggestions on troubleshooting?

    Network settings?
    Anti virus/spyware conflicts?
    I'm at a loss so any help is welcome.
  2. Ididmyc600

    Ididmyc600 TechSpot Chancellor Posts: 1,415


    I had a similar problem with a wireless setup and solved it by switching the channel that my wireless router used, I had to play around a while to find the best one, but it worked and I dont have the problem anymore.

    You dont say if your wireless or wired but if your wired, I would start with one PC connected to the router and see if happens, if so its the router, if not I would add the switch and see again if it happens, if it does its the switch, if not I would start to add PC's into the chain until it happens.

  3. jobeard

    jobeard TS Ambassador Posts: 9,156   +598

    I have that router too, but it comes in ~four version levels, so be sure to verify
    which one you have installed.

    Go to, support (or was it downloads) and get the firmware update
    for your version. The update solved all my disconnect issues.

    For all your systems, make sure you have the latest driver for each NIC card.

    Ididmyc600: the Netgear RP614 router is wired-only
  4. tipstir

    tipstir TS Ambassador Posts: 2,383   +105

    Once in a while you should turn off the Cable Modem. Then turn it back on again. When you do this shutdown the Router prior.

    Test your Cable Modem with your PC only by-pass the router and do this a day or two and see how the connection goes. If all is stable, then the Router might be shot..
  5. cfitzarl

    cfitzarl TechSpot Chancellor Posts: 1,975   +9

    Also make sure your cables are in as tightly as could also try anothe router/modem if you have extra's to make sure you don't just have a defective electronic :( .
  6. NetCablesPlus

    NetCablesPlus TS Maniac Posts: 228

    Along with what cfitzarl rcommended, you may want to substitute in known working cables as sometimes a bad crimp on the cable can cause intermittent connection problems.
  7. Ididmyc600

    Ididmyc600 TechSpot Chancellor Posts: 1,415

    Try setting static IP's as opposed to dynamic ones and see if that helps.

  8. jobeard

    jobeard TS Ambassador Posts: 9,156   +598

    sorry, I just never have seen a static ip address solve any connectivity problem!
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