B
Barb Bowman
to rule out the DNS server being the culprit, can you configure
different DNS servers on the NIC temporarily
type ncpa.cpl in the start/search field [enter]
right click the connection, then properties
ack the prompt
select IPv4, click properties
use the following DNS servers
4.2.2.2
4.2.2.3
OK
then run ipconfig /flushdns
does your experience improve?
Barb Bowman
MS-MVP
http://www.microsoft.com/windowsxp/expertzone/meetexperts/bowman.mspx
http://blogs.digitalmediaphile.com/barb/
different DNS servers on the NIC temporarily
type ncpa.cpl in the start/search field [enter]
right click the connection, then properties
ack the prompt
select IPv4, click properties
use the following DNS servers
4.2.2.2
4.2.2.3
OK
then run ipconfig /flushdns
does your experience improve?
--Hi Barb,
OK, here are the results of your earlier suggestion. I did a tracert and an
nslookup when the connection was up for a baseline (pasted below above the
line of asterisks), and then did the same thing after the connection went
down (below the line). You can see that neither worked, and trying an
ipconfig/flushdns did nothing b/c I couldn't even get through to the DNS
server. Oh, and I'm not wedded to the idea of using the Trend Micro product.
I had Avast! on my old computer, and never had any problems with it.
Anyway, here it is -
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Tait>tracert yahoo.com
Tracing route to yahoo.com [66.94.234.13]
over a maximum of 30 hops:
1 * * * Request timed out.
2 * * * Request timed out.
3 * * * Request timed out.
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 79 ms 77 ms 79 ms w2.rc.vip.scd.yahoo.com [66.94.234.13]
Trace complete.
C:\Users\Tait>nslookup
Default Server: cns.westlandrdc.mi.michigan.comcast.net
Address: 68.87.77.130:53
*******************************************
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Tait>tracert yahoo.com
Unable to resolve target system name yahoo.com.
C:\Users\Tait>nslookup
DNS request timed out.
timeout was 2 seconds.
Default Server: UnKnown
Address: 68.87.77.130:53
Server: UnKnownipconfig/flushdns
Address: 68.87.77.130:53
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out
Barb Bowman said:I don't recommend Trend Micro. Would you consider uninstalling it
and trying a different AV like Avast (free versions available) or
NOD32 - $, but the one I always recommend.
Hi Barb,
This happens no matter what I'm doing. I can be cruising along, reading a
blog or any other site, and the connection will just drop.
I'll try the tracert next time it goes down.
File sharing is off, network discovery was on but I turned it off. I am
using Trend Micro PC-Cillin for my AV program and the only firewall I have is
the built-in Vista firewall.
Tait
:
a couple of things. it's not unusual for the modem lights to blink
even though you aren't actively doing anything but here is questions
one:
does this always happen when you are not using the computer or does
it ever happen when you are doing something (downloading a file,
watching a video, browsing, etc.)?
question two: when you are in this state, from an elevated cmd
prompt, can you tracert to yahoo.com ? do a nslookup ? please report
outcome of this. and if not, does running the command
ipconfig /flushdns
restore connectivity for you?
please confirm that network discovery and file sharing are turned
off in the Network and Sharing Center.
also, are you using any third party AV/firewalls like McAfee/Norton?
On Wed, 12 Mar 2008 22:20:01 -0700, Tait Schleisman
Ask and you shall receive, Barb. Here it is -
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
C:\Users\Tait>ipconfig/all
Windows IP Configuration
Host Name . . . . . . . . . . . . : BlueSteel
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.mn.comcast.net.
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : hsd1.mn.comcast.net.
Description . . . . . . . . . . . : Broadcom NetLink (TM) Fast Ethernet
Physical Address. . . . . . . . . : 00-1E-C9-00-B5-07
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 66.41.227.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Lease Obtained. . . . . . . . . . : Wednesday, March 12, 2008 11:01:45 PM
Lease Expires . . . . . . . . . . : Sunday, March 16, 2008 10:24:42 PM
Default Gateway . . . . . . . . . : 66.41.226.1
DHCP Server . . . . . . . . . . . : 68.87.77.10
DNS Servers . . . . . . . . . . . : 68.87.77.130
68.87.72.130
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Local Area Connection* 9:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . :
2001:0:4137:9e66:1ccf:3c45:bdd6:1cfd(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::1ccf:3c45:bdd6:1cfd%10(Preferred)
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter Local Area Connection* 10:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 6TO4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Local Area Connection* 15:
Connection-specific DNS Suffix . : hsd1.mn.comcast.net.
Description . . . . . . . . . . . : isatap.hsd1.mn.comcast.net.
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . :
fe80::200:5efe:66.41.227.2%18(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 68.87.77.130
68.87.72.130
NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter Local Area Connection* 17:
Connection-specific DNS Suffix . : hsd1.mn.comcast.net.
Description . . . . . . . . . . . : 6TO4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Temporary IPv6 Address. . . . . . : 2002:4229:e302::4229:e302(Preferred)
Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301
DNS Servers . . . . . . . . . . . : 68.87.77.130
68.87.72.130
NetBIOS over Tcpip. . . . . . . . : Disabled
C:\Users\Tait>
:
before you restart next time this happens, get a new ipconfig /all.
save it in notepad. reboot, open the file and then copy to the
clipboard and paste in here as a reply.
On Tue, 11 Mar 2008 20:06:01 -0700, Tait Schleisman
Hi Barb,
Sorry, I should have been clearer in my last post. When I said I disabled
IPv6, I did exactly what your blog post said to do, so I've already "unbound"
it. Sad to say, that didn't solve the problem. I just had to do a restart
after my connection went down yet again. I don't know what other network or
NIC settings to check, at this point. Maybe I just need a brand new network
card?
Tait
:
try unbinding IPv6
http://digitalmediaphile.wordpress.com/ipv6-how-to-unbind-from-a-nic-in-windows-vista/
On Mon, 10 Mar 2008 15:18:00 -0700, Tait Schleisman
Hi Barb,
Changing the power plan doesn't seem to have helped. I was online for quite
a while yesterday (a little over 6 hours, the longest continuous stretch so
far, I believe), and hoped that maybe the problem was fixed. Unfortunately,
my connection did eventually drop. The problem isn't with Comcast or my
cable modem, as far as I can tell. The light on the modem that shows my
internet connection stays steady green, so I know that's OK, and the
send/receive lights continue flickering with activity even after the computer
says the connection has been lost. It's like something in the computer
eventually decides it doesn't want to talk to the modem anymore, even though
the info is still coming in. I'm stumped.
Thanks,
Tait
:
Hi Barb,
I unchecked that box in Device Manager a few days ago when I ran across it
as a possible solution on a different website. So far, it hasn't made a
difference. I did change my power plan to High Performace as you suggested;
I'll let you know if the problem persists after the change.
Thanks,
Tait
:
Comcast can assign different subnet masks so don't worry about that
at all.
Check your power management settings. In device manager, is the box
checked to turn off power on the NIC? Can you also try running with
the high power option to rule out any other power management
options?
Hi Barb,
I've been having an issue very much like the ones described in this thread
ever since I purchased my Dell Inspiron 1420 laptop last month, except that
my problem occurs when I'm on a wired connection, not a wireless one. After
getting the computer out of the box I plugged in the Ethernet cable and was
able to get online w/o a problem. I let Windows Update download and install
multiple security updates and hotfixes, after which I began experiencing
dropped connectivity. Thinking that one of the updates might be the problem,
I did a clean restore of the OS from the included CD, but the problem has
continued. After (usually) a few hours online, my connection will drop and
the network status icon will show a yellow triangle with an exclamation point
in it. If I do a mouseover, it says my access is Limited (or maybe just
Local - I can check when it happens again). I have called Dell and my ISP,
and nothing they suggested has solved the problem. The only thing that seems
to work is a reboot.
My network adapter is a Broadcom NetLink Fast Ethernet running what I
believe to be the latest drivers. I've tried resetting the adapter,
requesting a new IP address, everything I can think of (and I think most
suggestions made here), but all to no avail. The output of my ipconfig/all
is below; I would appreciate any suggestions you have for me.
Thank you!
Tait
Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.
Windows IP Configuration
Host Name . . . . . . . . . . . . : BlueSteel
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.mn.comcast.net.
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : hsd1.mn.comcast.net.
Description . . . . . . . . . . . : Broadcom NetLink (TM) Fast Ethernet
Physical Address. . . . . . . . . : 00-1E-C9-00-B5-07
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::645c:f263:1052:680a%9(Preferred)
IPv4 Address. . . . . . . . . . . : 66.41.227.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Lease Obtained. . . . . . . . . . : Saturday, March 08, 2008 7:02:24 PM
Lease Expires . . . . . . . . . . : Wednesday, March 12, 2008 3:41:01 AM
Default Gateway . . . . . . . . . : 66.41.226.1
DHCP Server . . . . . . . . . . . : 68.87.77.10
DHCPv6 IAID . . . . . . . . . . . : 184557257
DNS Servers . . . . . . . . . . . : 68.87.77.130
68.87.72.130
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter Local Area Connection* 9:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . :
2001:0:4137:9e66:c35:1574:bdd6:1cfd(Prefe
rred)
Link-local IPv6 Address . . . . . : fe80::c35:1574:bdd6:1cfd%10(Preferred)
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter Local Area Connection* 15:
Connection-specific DNS Suffix . : hsd1.mn.comcast.net.
Description . . . . . . . . . . . : isatap.hsd1.mn.comcast.net.
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . :
fe80::200:5efe:66.41.227.2%17(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 68.87.77.130
68.87.72.130
NetBIOS over Tcpip. . . . . . . . : Disabled
Tunnel adapter Local Area Connection* 16:
Connection-specific DNS Suffix . : hsd1.mn.comcast.net.
Description . . . . . . . . . . . : 6TO4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
Barb Bowman
MS-MVP
http://www.microsoft.com/windowsxp/expertzone/meetexperts/bowman.mspx
http://blogs.digitalmediaphile.com/barb/
