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Ethernet connection prevents connectivity...........arp cache apparently wack-oh

Relevant facts:

XP home, sp2.
Firewall turned off (for troubleshooting)

When I attempt to connect to anything via my ethernet connection..........if fails. When I do it via my wireless connection it works. When both are enabled it fails.

troublshooting attempts.

1.  "repair" via windows connection interface.  Result: Get a message telling me the arp cache can not be repaired

2. Changed ethernet cable.....Result: no change

3. Pinging..........
Can't even ping the gateway.......but only when the ethernet conneciton is "enabled", when its disabled........everything (wirelessly) works fine.  No other cpu's have any problems.

4. command prompt........arp -a, "Unable to retrieve ARP information: 87"..........for about 5 seconds then arp -a again and "no arp entries found".

Conclusion.........so my arp table is corrupt or something.  But then why does the wireless work. Doesn't it invoke the same funcitionaly (.exe....etc.) of arp??

educate me......please.
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Scott YeahRight
Asked:
Scott YeahRight
1 Solution
 
Scott YeahRightGoodGuyAuthor Commented:
I can ping 127.0.0.1 and I can ping the dhcp assigned ip,.............192.168.0.9.   So early indications are the stack is fine. Correct?  Does the "stack" include the arp functionality?
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Scott YeahRightGoodGuyAuthor Commented:
Just ran a scan for spyware..........nothing comes up as a problem.
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rsivanandanCommented:
Yes the stack includes the arp too. Lets do couple of basic things first;

Do in a command prompt;

netsh int ip reset reset.log

netsh winsock reset

Then restart the machine, see if it is any better.

If no, uninstall the ethernet card, restart the machine then let the machine install it again. See if that makes any difference.

Cheers,
Rajesh
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Scott YeahRightGoodGuyAuthor Commented:
First, this is a built in (laptop) ethernet port. I"ve completed your command.  Rebooting now.
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ykampCommented:
Have you tried to assign as static ip?? Arp is used by DHCP protocol and obviously something goes wrong there. Why don't you try to set a static ip???
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Scott YeahRightGoodGuyAuthor Commented:
Problem continues.

came up, launched browser with both network (ethernet, wireless) connections enabled.  Browser (iE6.0) gave failure message.

disabled ethernet connection.

refreshed browser, successful connectivity.

command prompt.

ipconfig confirms have same ip's as prior to boot..........3 and 9 for wireless and ethernet.

pinged

127.0.0.1, 192.168.0.3, and .9 ............all successfully.

enabled ethernet connection.

command prompt

ipconfig /release, renew.........

ipconfig /all shows same dhcp assigned ips.  I wanted to verify to myself that it wasn't a hardware (onboard) failure.  Thus by releaseing the ip from the port and then requesting a new one, suggests (to me at least) that the hardware is able to request, recieve and register to the OS...........it has the abiility to communicate sussessfully.
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GizmoKidCommented:
Try and disable your wireless adapter & then ping throw ethernet
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Scott YeahRightGoodGuyAuthor Commented:
have done that.........see above...........its fails.
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Scott YeahRightGoodGuyAuthor Commented:
just loaded netdiag from cd.

here are results  (I"m curious why it lists me as running w2k pro........this is xp home)


.......

    Computer Name: LAPTOP
    DNS Host Name: laptop
    System info : Windows 2000 Professional
    Processor : x86 Family 15 Model 2 Steppi
    List of installed hotfixes :
        KB873339
        KB885250
        KB885835
        KB885836
        KB886185
        KB888113
        KB888302
        KB890046
        KB890859
        KB891781
        KB893756
        KB893803v2
        KB894391
        KB896358
        KB896422
        KB896423
        KB896424
        KB896428
        KB899587
        KB899591
        KB900485
        KB900725
        KB901017
        KB901214
        KB902400
        KB904706
        KB904942
        KB905414
        KB905749
        KB905915
        KB908519
        KB908531
        KB910437
        KB911562
        KB911564
        KB911567
        KB911927
        KB912812
        KB912919
        KB913446
        KB913580
        KB914882
        KB915865
        Q147222


Netcard queries test . . . . . . . : Passed
    GetStats failed for 'Infrared Port'. [ER
    [WARNING] The net card 'SMC IrCC - Fast
cause it has not received any packets.



Per interface results:

    Adapter : Wireless Network Connection

        Netcard queries test . . . : Passed


Global results:


Domain membership test . . . . . . : Passed
    Dns domain name is not specified.
    Dns forest name is not specified.


NetBT transports test. . . . . . . : Failed
    List of NetBt transports currently confi
    [FATAL] No NetBt transports are configur


Winsock test . . . . . . . . . . . : Passed
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programmer1024Commented:
Maybe the card is bad?
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Scott YeahRightGoodGuyAuthor Commented:
Its not a card. Its on the motherboard. (see above).

Yes, I know it could still be bad.

Yeah, I thought of that. But it does everything else (obtains ip, etc.).

Plus why/how does it prevent the wireless interface from working when their both enabled.

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UstasCommented:
Someone suggested that you try to disable wireless connection. Did you do that?

Can you post "ipconfig /ALL" (from start->run->cmd) for when:

1) only ethernet is enabled
2) only wireless is enabled
3) when both are enabled.

Can you check if you have "Alternate Configuration" setup for your LAN? Do you have any static IPs assigned to either of your network adapters?

Do you have any other network adapters setup, like 1394 maybe?

If you setup is entirely DHCP, make sure no static entries are set. Alternatively, try the contrary, set a static IP onto the ethernet adapter, and temporarily disable "DHCP client" service from Administrative Tools->Services.
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Scott YeahRightGoodGuyAuthor Commented:
I can only get connectivity when the wireless is ENABLED and the wired is DISABLED.  When either their both enabled or the wired is enabled by itself.......the wired connection does NOT work.
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Scott YeahRightGoodGuyAuthor Commented:
Here is ipconfig /all ......thanks for asking.


C:\Documents and Settings\Scott>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : laptop
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : Yes
        WINS Proxy Enabled. . . . . . . . : Yes
        DNS Suffix Search List. . . . . . : hsd1.wa.comcast.net.

Ethernet adapter Wireless Network Connection:

        Connection-specific DNS Suffix  . : hsd1.wa.comcast.net.
        Description . . . . . . . . . . . : Intel(R) PRO/Wireless 2200BG Network
 Connection
        Physical Address. . . . . . . . . : 00-0E-35-EF-2B-FF
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.0.3
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.1
        DHCP Server . . . . . . . . . . . : 192.168.0.1
        DNS Servers . . . . . . . . . . . : 192.168.0.1
        Lease Obtained. . . . . . . . . . : Saturday, June 03, 2006 3:38:22 PM
        Lease Expires . . . . . . . . . . : Sunday, June 04, 2006 3:38:22 PM

Ethernet adapter Local Area Connection:

        Media State . . . . . . . . . . . : Media disconnected
        Description . . . . . . . . . . . : 3Com 3C920 Integrated Fast Ethernet
Controller (3C905C-TX Compatible)
        Physical Address. . . . . . . . . : 00-14-22-C3-F6-91

C:\Documents and Settings\Scott>
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Scott YeahRightGoodGuyAuthor Commented:
By the way......device manager shows no problems for the card.
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Scott YeahRightGoodGuyAuthor Commented:
Fixed it.

Re-installed the driver.......wow.  Weird.  Learn something everyday.  

Points split for effort.
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