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Intermittent internet

Discussion in 'Networking' started by sweetsunday, Nov 6, 2011.

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  1. sweetsunday

    sweetsunday Thread Starter

    Joined:
    Dec 25, 2008
    Messages:
    5
    Hi,

    I have a (relatively) new laptop and (relatively) new router which have worked fine until this week.

    I have experienced many different types of problems - not all at the same time obviously!:
    1. My laptop can't find the router
    2. My laptop finds the router but can't connect to it
    3. My laptop finds the router, can connect to it but says there's a problem with connecting to the internet (although there isn't, as there are other people who use the router and can connect with the internet without problem)
    4. My laptop can connect to the internet but my browser won't load, or is very very slow
    5. When I am trying to watch iPlayer or similar, the browser tells me I have insufficient bandwidth

    I have never had these issues before!

    Please help!!
     
  2. TerryNet

    TerryNet Moderator

    Joined:
    Mar 23, 2005
    Messages:
    79,837
    First Name:
    Terry
    Start, Run, CMD, OK to open a command prompt:
    (For Vista or 7 type CMD in the Search box after Start)

    Type the following command:

    IPCONFIG /ALL

    [Note that there is no space between the slash and ALL.]

    Right click in the command window and choose Select All, then hit Enter.
    Paste the results in a message here.

    If necessary use a text file and removable media to copy the results to a computer with internet access.
     
  3. sweetsunday

    sweetsunday Thread Starter

    Joined:
    Dec 25, 2008
    Messages:
    5
    My internet is working right this second (although I have had to reset my computer about 3 times today and disconnected/reconnected several times) so I don't know if this will tell you much:

    Microsoft Windows [Version 6.1.7600]
    Copyright (c) 2009 Microsoft Corporation. All rights reserved.

    C:\Users\rm333>IPCONFIG/ALL

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : rm333-PC
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : lan

    Wireless LAN adapter Wireless Network Connection 2:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter
    Physical Address. . . . . . . . . : 18-F4-6A-6F-25-56
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Wireless LAN adapter Wireless Network Connection:

    Connection-specific DNS Suffix . : lan
    Description . . . . . . . . . . . : Broadcom 802.11n Network Adapter
    Physical Address. . . . . . . . . : 18-F4-6A-6F-25-56
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::7d22:f48f:4e64:837e%12(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.1.67(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : 07 November 2011 15:43:49
    Lease Expires . . . . . . . . . . : 08 November 2011 15:43:49
    Default Gateway . . . . . . . . . : 192.168.1.254
    DHCP Server . . . . . . . . . . . : 192.168.1.254
    DHCPv6 IAID . . . . . . . . . . . : 387511402
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-B9-70-80-1C-75-08-B1-11-98

    DNS Servers . . . . . . . . . . . : 192.168.1.254
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Local Area Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
    Physical Address. . . . . . . . . : 1C-75-08-B1-11-98
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter isatap.lan:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . : lan
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter isatap.{2EFE7D56-17EF-4BFC-8BD9-B923B5B9706D}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter Teredo Tunneling Pseudo-Interface:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    C:\Users\rm333>
     
  4. TerryNet

    TerryNet Moderator

    Joined:
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    Messages:
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    First Name:
    Terry
    It tells me a lot. :) Most importantly it says that you are using a Wi-Fi connection and using an integrated adapter.

    Make sure you have the latest wireless driver from your laptop manufacturer's web site.

    Please attach a screen shot of the Networks page of the Xirrus Wi-Fi Inspector (preferably when things are going well and for another time when not so good).
     
  5. sweetsunday

    sweetsunday Thread Starter

    Joined:
    Dec 25, 2008
    Messages:
    5
    Find pics attached :) Thank you!
     

    Attached Files:

  6. TerryNet

    TerryNet Moderator

    Joined:
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    Messages:
    79,837
    First Name:
    Terry
    For a reliable, or robust as the Xirrus user manual says, connection you need -70 dBm or better. Your "OK" time shows just barely in that range and the disconnected time shows outside that range.

    What has changed since you didn't have these issues? Router antenna became loose? Router antenna not oriented properly? Router moved? Now using the laptop farther away? Another obstruction added between router and laptop?

    If you can access the adapter easily (by removing a cover on the bottom of the laptop) check to make sure the antenna leads are secure. While you're there remove and carefully and firmly replace the card several times (in case the contacts are corroded or loose).
     
  7. sweetsunday

    sweetsunday Thread Starter

    Joined:
    Dec 25, 2008
    Messages:
    5
    The only thing that has happened is that I took my laptop away for a week and connected to a different wi-fi router.

    There is nothing wrong with the router (I don't think, anyway) because there are other users and they, usually, report no problems. I am not using the laptop further away and I don't think there is anything between router and laptop...

    I will try to check the antenna leads etc when I get home tonight...I will let you know what happens!

    Thank you for all your help :)
     
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