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Router issue-ADSL Router on Cable Internet Modem

By MyHelp
Jan 31, 2016
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  1. Hi All,
    I have taken help from forums across internet and finally got my cable Modem connected to my DSL router (Dlink - DSL-2750U) using port 1 and port 2 for modem and pc respectively. With my wired connection I get 50 Mbps speed. But unable to get the router wifi setup so that my other laptops and phones could get connected.
    With my local Area connection active, on enabling the Wireless Network Connection, I find wifi is connected and secured. But the phones or laptops connections keep on connecting.
    On disabling "Local area connection", the wifi says "No internet access".

    I have the DHCP server disabled from my router page (192.168.1.1-->Advanced Setup-->Lan-->"Disable DHCP Server").

    I would appreciate if someone could help me understand how to get the Wifi up and running.
    Thanks.
     
  2. jobeard

    jobeard TS Ambassador Posts: 9,322   +620

    Let's verify the modem has router services first, connect the pc directly to the modem and then use command prompt to enter
    • ipconfig
    should be something like
    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . : xxx.yyy.zzz
    IPv4 Address. . . . . . . . . . . : 192.168.0.5
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 192.168.0.1

    The Default Gateway is the modem router location in this example & IPv4 Address is the pc
     
  3. MyHelp

    MyHelp TS Rookie Topic Starter

    Hi Jobeard, Thanks for responding.
    I have checked the ipconfig and its as below
    Connection-specific DNS Suffix . : <Blank>
    Link-local IPv6 Address . . . . . : Alpha numeric number
    IPv4 Address. . . . . . . . . . . : 116.75.26.152
    Subnet Mask . . . . . . . . . . . : 255.255.192.0
    Default Gateway . . . . . . . . . : 116.75.0.1
     
  4. MyHelp

    MyHelp TS Rookie Topic Starter

    And the ipconfig is the same when I connect the modem to my DSL Router (Port 1) and PC to Router (Port 2).
    Link-local IPv6 Address . . . . . : Alpha numeric number
    IPv4 Address. . . . . . . . . . . : 116.75.26.152
    Subnet Mask . . . . . . . . . . . : 255.255.192.0
    Default Gateway . . . . . . . . . : 116.75.0.1
     
  5. jobeard

    jobeard TS Ambassador Posts: 9,322   +620

    There are two tests:
    1. isp=== modem === PC
    2. isp=== modem ===router===pc
    let's prove (1) first: report the results of that setup and the output of IPCONFIG

    lash up (2) and report ipconfig results again
     
  6. MyHelp

    MyHelp TS Rookie Topic Starter

    Below are results of both tests

    Test1 --> ISP ===Modem===PC


    Windows IP Configuration

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . :

    Link-local IPv6 Address . . . . . : fe80::7528:994e:7abc:9d0%18

    IPv4 Address. . . . . . . . . . . : 116.75.2.231

    Subnet Mask . . . . . . . . . . . : 255.255.192.0

    Default Gateway . . . . . . . . . : 116.75.0.1


    Tunnel adapter 6TO4 Adapter:

    Connection-specific DNS Suffix . :

    IPv6 Address. . . . . . . . . . . : 2002:744b:2e7::744b:2e7

    Default Gateway . . . . . . . . . : 2002:c058:6301::1

    2002:c058:6301::c058:6301


    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Connection-specific DNS Suffix . :

    IPv6 Address. . . . . . . . . . . : 2001:0:9d38:6abd:14da:26d8:8bb4:fd18

    Link-local IPv6 Address . . . . . : fe80::14da:26d8:8bb4:fd18%22

    Default Gateway . . . . . . . . . :

    Tunnel adapter isatap.{B0DD6E24-534A-401F-9CFB-3AACC1977E69}:

    Media State . . . . . . . . . . . : Media disconnected

    Connection-specific DNS Suffix . :




    Test2 --> ISP ===Modem===Router===PC


    Windows IP Configuration

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . :

    Link-local IPv6 Address . . . . . : fe80::7528:994e:7abc:9d0%18

    IPv4 Address. . . . . . . . . . . : 116.75.2.231

    Subnet Mask . . . . . . . . . . . : 255.255.192.0

    Default Gateway . . . . . . . . . : 116.75.0.1


    Tunnel adapter 6TO4 Adapter:

    Connection-specific DNS Suffix . :

    IPv6 Address. . . . . . . . . . . : 2002:744b:2e7::744b:2e7

    Default Gateway . . . . . . . . . : 2002:c058:6301::1

    2002:c058:6301::c058:6301

    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Connection-specific DNS Suffix . :

    IPv6 Address. . . . . . . . . . . : 2001:0:9d38:6abd:14da:26d8:8bb4:fd18

    Link-local IPv6 Address . . . . . : fe80::14da:26d8:8bb4:fd18%22

    Default Gateway . . . . . . . . . :

    Tunnel adapter isatap.{B0DD6E24-534A-401F-9CFB-3AACC1977E69}:

    Media State . . . . . . . . . . . : Media disconnected

    Connection-specific DNS Suffix . :
     
  7. jobeard

    jobeard TS Ambassador Posts: 9,322   +620

    Good; this proves the route DHCP is disabled and all assignments are coming from the modem.

    Guess you're saying the wifi works too.
    does this mean they connect, drop and then reconnect?

    This would be normal as the router provides the WIFI, but the router needs to be active to forward to the modem.
     
  8. MyHelp

    MyHelp TS Rookie Topic Starter

    I can find the Wifi but on entering the password on my android phone, I get "Obtaining IP address from ...." msg, then it shows Scanning and then again "Obtaining...."
    On Iphone, I see a wheel on the left of the the router wifi name and have no internet. I.e. it keeps on attempting to connect unsuccessfully.

    In short Wifi though visible, I am not able to connect devices.
     
  9. jobeard

    jobeard TS Ambassador Posts: 9,322   +620

    Ok, sounds like the router has WiFi issues. Reboot it by power off for at least 30 seconds.

    Also disconnect router---pc and THEN attempt isp==modem===router - - wifi - - to the PC.
     
  10. MyHelp

    MyHelp TS Rookie Topic Starter

    Well I did follow the below steps
    1. Turned off the power to the router.
    2. Disconnected the PC from the router (port2) cable
    3. Then attempted connecting the PC via router with ISP==Modem==Router connection
    I get "No Internet, Secured" under Wireless Network Connection of the PC.
    The ipconfig details are below
    Windows IP Configuration


    Ethernet adapter Local Area Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :

    Wireless LAN adapter Local Area Connection* 2:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :

    Wireless LAN adapter Local Area Connection* 5:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :

    Wireless LAN adapter Wireless Network Connection:

    Connection-specific DNS Suffix . :
    Link-local IPv6 Address . . . . . : fe80::c173:eefa:1116:f416%25
    Autoconfiguration IPv4 Address. . : 169.254.244.22
    Subnet Mask . . . . . . . . . . . : 255.255.0.0
    Default Gateway . . . . . . . . . :

    Tunnel adapter isatap.{D78FAE90-0834-41EF-84A0-6805846839A6}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :

    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
     
  11. jobeard

    jobeard TS Ambassador Posts: 9,322   +620

    I'm reaching the conclusion that the router
    • needs a firmware update (if available)
    • or to just be replaced.
    You've done everything correctly and this setup has been used by many, including myself.
     
  12. MyHelp

    MyHelp TS Rookie Topic Starter

    Ok. Thanks for putting time on this issue. I will first try the Firmware update and if it doesn't work, will buy a new one.
     

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