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Author Topic: dhcp disconnected  (Read 15683 times)

milicevic

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dhcp disconnected
« on: November 27, 2013, 07:43:37 AM »

Hi,
I've bought this router 2 weeks ago and since than, it was working just fine with my cable modem Scientfic Atlanta. Yesterday when I turned the router on, there was no internet and in internet option (Easy Setup) it was said that dhcp is disconnected. Tried with reset several times and installation all over again, but nothing. Flashed firmware 1.14 again, also tried with another cable modem and ISP, but still no success. DHCP is always disconnected no matter what. I think it's problem with WAN port of the router. So, shall I send it to repair shop or there is another way to get this router working properly.
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FurryNutz

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Re: dhcp disconnected
« Reply #1 on: November 27, 2013, 10:21:55 AM »

Link>Welcome!

  • What Hardware version is your router? Look at sticker under router.
  • Link>What Firmware version is currently loaded? Found on the routers web page under status.
  • What region are you located?
  • Are you wired or wireless connected to the router?

Internet Service Provider and Modem Configurations
  • What ISP Service do you have? Cable or DSL?
  • What ISP Modem Mfr. and model # do you have?

Try power cycling the ISP modem first then power on the router.

Swap cables between the ISP modem and router and test.

Why is the router being turned off. It can be left ON all the time.
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Cable: 1Gb/50Mb>NetGear CM1200>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-LX1870,857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.

milicevic

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Re: dhcp disconnected
« Reply #2 on: November 27, 2013, 10:36:09 AM »

Link>Welcome!


•What Hardware version is your router? Look at sticker under router.  -  A1
•Link>What Firmware version is currently loaded?  - 1.14
•What region are you located?  - Europe, Serbia
•Are you wired or wireless connected to the router?  -  wired

Internet Service Provider and Modem Configurations

•What ISP Service do you have? Cable or DSL?  -  Cable
•What ISP Modem Mfr. and model # do you have?  - Scientific Atlanta 2100
Try power cycling the ISP modem first then power on the router. - tried
Swap cables between the ISP modem and router and test. - tried
Why is the router being turned off. It can be left ON all the time. - I was away for 2 days
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FurryNutz

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Re: dhcp disconnected
« Reply #3 on: November 27, 2013, 10:44:27 AM »

I recommend that you have your ISP check the cabling going to the ISP modem, check signal levels going to the ISP modem. Check for t.v. line splitters and remove them as they can introduce noise on the line and lower the signal going to the ISP modem. Connecting to the ISP modem could result in a false positive as the signal to the modem could be just enough to that point then adding on a router, could see problems. The router operation is dependent upon getting good data flow from the ISP modem and the modem is dependent upon getting good signal from the ISP Service.

Router and Wired Configurations
Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router.
  • Turn off ALL QoS or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options, Advanced/QoS or Gamefuel.
  • Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
  • Enable Use Unicasting (compatibility for some ISP DHCP Servers) under Setup/Internet/Manual.
  • Turn on DNS Relay under Setup/Networking. Link>Finding Faster DNS Addresses using Name Bench
  • Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting.
  • Ensure devices are set to auto obtain an IP address.
  • If IPv6 is an option on the router, select Local Connection Only or Disable IPv6 options under Setup/IPv6.
  • Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Enable or Disable SPI to test.
  • Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules. Enable IPv6 Multi-cast Streaming for routers that have a Media Server option. Disable IPv6 Multi-cast Streaming if IPv6 or Media Server is not being used.
  • Turn off WISH, and WPS under Advanced.
  • WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port Speed
  • Set current Time Zone, Date and Time. Use an NTP Server feature. Tools/Time.

3rd Party Security Software Configurations
  • Turn off all anti virus and firewall programs on PC while testing. 3rd party firewalls are not generally needed when using routers as they are effective on blocking malicious inbound traffic.
  • Turn off all devices accept for one wired LAN PC while testing.
  • Disable any downloading client software managers, i.e. Torrents or similar.


Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
6" minimum safe distance between devices.
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Cable: 1Gb/50Mb>NetGear CM1200>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-LX1870,857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.