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Wireless Network Issues

Discussion in 'Networking' started by scotlanddan, Oct 27, 2011.

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  1. scotlanddan

    scotlanddan Thread Starter

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    Hi all,

    I have been recently having severe network connectivity issues on my PC. At first, it was random disconnects, then they became more frequent and eventually I was completely unable to connect to my network.

    Eventually I figured that it must be a problem with my router or modem, and after a talk with my ISP, they replaced both. I was able to connect but soon after the problem started again. It was at this point that I had purchased a netbook, and realised I was able to connect and use my wireless network fine on it, but not on my PC.

    I ran various virus scans using Malware Bytes and Microsoft Security Essentials but found nothing. I tried various CMD commands, such as netsh ip /reset /renew etc.

    So finally, I figured ( with my very limited technical knowledge ), that it must have been a problem with my Wireless Network Interface Card. I purchased a new one and installed it, and found it to work perfectly. Now a couple of days after this (now), the problem has started again. Just 3 days after installing the new card I am able to connect, but the connection is far too slow to do anything on ( posting this from my netbook ).

    My next step is to contact a repair shop, but I have had bad experiences with these in the past, and would love to avoid it if possible.

    Does anyone have any advice as to what I can do?
     
  2. scotlanddan

    scotlanddan Thread Starter

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  3. jat421

    jat421

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    is your router n or g?

    In your router settings try to change the frequency that it is communicating on.

    Hope this helps
     
  4. TerryNet

    TerryNet Moderator

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    First Name:
    Terry
    Are you able to connect successfully by ethernet?

    Please attach a screen shot of the Networks page of the Xirrus Wi-Fi Inspector and show ...

    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.
     
  5. scotlanddan

    scotlanddan Thread Starter

    Joined:
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    Messages:
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    Hi to above, this is the first chance I've had to post again.

    @Jat421

    I'm not sure whether or not my router is N or G, how exactly do I check this? My router is a D-Link DIR-615.

    I opened the router settings with my IP and looked around but I was unable to change the frequency.


    @TerryNet

    I'm currently posting from my PC on a wired connection. Hadn't tried this until now because it was a huge hassle to completely unplug everything and carry my PC through, but the connection has been absolutely perfect wired.

    Will post ipconfig /all and results from Xirrus test shortly, just need to test wireless connection again.
     
  6. scotlanddan

    scotlanddan Thread Starter

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    Messages:
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    Alright, after plugging in again, i'm able to connect wireless ( although i'm literally adjacent to my PC ).

    I doubt this is the problem solved through, every time it seems to fix itself, it's broken again in a couple of days.

    Results from ipconfig /all

    Microsoft Windows [Version 6.1.7601]
    Copyright (c) 2009 Microsoft Corporation. All rights reserved.

    C:\Windows\system32>ipconfig /all

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : [pcname]
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No
    DNS Suffix Search List. . . . . . : cable.virginmedia.net

    Wireless LAN adapter Wireless Network Connection 5:

    Connection-specific DNS Suffix . : cable.virginmedia.net
    Description . . . . . . . . . . . : Realtek 8185 Extensible 802.11b/g Wireles
    s Device
    Physical Address. . . . . . . . . : 00-11-3B-18-EA-56
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::4581:bd96:52b3:3ed3%25(Preferred)
    IPv4 Address. . . . . . . . . . . : 192.168.0.100(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : 28 October 2011 17:31:21
    Lease Expires . . . . . . . . . . : 04 November 2011 17:31:21
    Default Gateway . . . . . . . . . : 192.168.0.1
    DHCP Server . . . . . . . . . . . : 192.168.0.1
    DHCPv6 IAID . . . . . . . . . . . : 553652539
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-E3-84-5B-E0-CB-4E-B9-6F-EA

    DNS Servers . . . . . . . . . . . : 192.168.0.1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Local Area Connection:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . : cable.virginmedia.net
    Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
    Physical Address. . . . . . . . . : E0-CB-4E-B9-6F-EA
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes

    Ethernet adapter VMware Network Adapter VMnet1:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet
    1
    Physical Address. . . . . . . . . : 00-50-56-C0-00-01
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::65d8:981:5e25:dcfc%13(Preferred)
    Autoconfiguration IPv4 Address. . : 169.254.220.252(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.0.0
    Default Gateway . . . . . . . . . :
    DHCPv6 IAID . . . . . . . . . . . : 536891478
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-E3-84-5B-E0-CB-4E-B9-6F-EA

    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
    fec0:0:0:ffff::2%1
    fec0:0:0:ffff::3%1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter VMware Network Adapter VMnet8:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : VMware Virtual Ethernet Adapter for VMnet
    8
    Physical Address. . . . . . . . . : 00-50-56-C0-00-08
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    Link-local IPv6 Address . . . . . : fe80::88dc:836e:8381:81f8%14(Preferred)
    Autoconfiguration IPv4 Address. . : 169.254.129.248(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.0.0
    Default Gateway . . . . . . . . . :
    DHCPv6 IAID . . . . . . . . . . . : 553668694
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-E3-84-5B-E0-CB-4E-B9-6F-EA

    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
    fec0:0:0:ffff::2%1
    fec0:0:0:ffff::3%1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Hamachi:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Hamachi Network Interface
    Physical Address. . . . . . . . . : 7A-79-05-8A-B0-4B
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IPv6 Address. . . . . . . . . . . : 2620:9b::58a:b04b(Preferred)
    Link-local IPv6 Address . . . . . : fe80::2160:89db:894c:823%18(Preferred)
    IPv4 Address. . . . . . . . . . . : 5.138.176.75(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.0.0.0
    Lease Obtained. . . . . . . . . . : 28 October 2011 17:17:40
    Lease Expires . . . . . . . . . . : 27 October 2012 17:17:43
    Default Gateway . . . . . . . . . :
    DHCP Server . . . . . . . . . . . : 5.0.0.1
    DHCPv6 IAID . . . . . . . . . . . : 595229083
    DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-E3-84-5B-E0-CB-4E-B9-6F-EA

    DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
    fec0:0:0:ffff::2%1
    fec0:0:0:ffff::3%1
    NetBIOS over Tcpip. . . . . . . . : Enabled

    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

    Tunnel adapter isatap.{478BCEF1-29F6-4506-AC53-5306BFD3DA98}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter isatap.{5AB2D02A-886D-412C-84B5-AE387CF102CE}:

    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 isatap.cable.virginmedia.net:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . : cable.virginmedia.net
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #4
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    Tunnel adapter isatap.{F512D1AD-C351-4482-BB09-B0DB99C42D71}:

    Media State . . . . . . . . . . . : Media disconnected
    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Microsoft ISATAP Adapter #5
    Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes

    C:\Windows\system32>
    C:\Windows\system32>
     
  7. scotlanddan

    scotlanddan Thread Starter

    Joined:
    Oct 27, 2011
    Messages:
    10
    http://imgur.com/mXx4A

    Here's the results from Xirrus tests.

    Again, i'm able to connect wirelessly now from a very short range, but i'm worried that this is only a temporary fix. Any help would be amazing.
     
  8. scotlanddan

    scotlanddan Thread Starter

    Joined:
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    Messages:
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    bump; I moved my computer just across the room, i'm about 6/7 meters away from the router, and the connection quality is pretty poor.
     
  9. jat421

    jat421

    Joined:
    Jun 14, 2008
    Messages:
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    Yea you have N router. If you go to 192.168.0.1 and then inside wireless settings you should see a setting for channel and frequency. Try changing the channel to some other number
     
  10. scotlanddan

    scotlanddan Thread Starter

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    Tried a number of channels but none improved anything. Speed is really low again, i'm still only 5 ish meters away from my router.

    Thanks for the reply anyway.
     
  11. jat421

    jat421

    Joined:
    Jun 14, 2008
    Messages:
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    Check if you have the latest firmware of the router.

    Also, if you have lots of walls in between that can effect the speed aswell. How is the signal strength?
     
  12. scotlanddan

    scotlanddan Thread Starter

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    Checked, it is the latest.

    I have one wall usually but right now there are no walls.
     
  13. TerryNet

    TerryNet Moderator

    Joined:
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    Messages:
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    First Name:
    Terry
    Make sure you have the latest wireless driver. You probably have to look on Realtek's site, but first look to see if your PC manufacturer has it (possible modified from what Realtek supplies).

    There's not much point in changing channels just for something to do. In your screenshot there are no other networks showing, so I do not understand what changing them would do unless there is suspicion of something like a 2.4 GHz cordless phone or baby monitor.

    We need to see the Xirrus from the problem place(s). The one you showed does indicate one problem--that signal history line should be very straight, should be difficult to see any variation. I'm guessing that the variation is caused by a loose antenna (router or adapter), defective adapter, or defective router. Could also be some component (power supply, graphics card, ...) in the PC causing interference.

    Check Xirrus with your netbook. I suspect it will look fine, which exonerates the router.
     
  14. scotlanddan

    scotlanddan Thread Starter

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  15. TerryNet

    TerryNet Moderator

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    First Name:
    Terry
    I trust you noticed the dramatic difference in those two graphs. :) Something bad about that desktop's adapter or its antenna or its environment (another component causing a problem).
     
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