Re: Windows loses DNS capability periodically - reboot fixes

if your computer was turned off/hibernating etc., the lease may
expire when it is in this state. a better driver for you NIC might
fix this (and/or a firmware upgrade for your router), and you can
also set the lease time on most routers to be a longer period in the
admin pages (which will certainly make this happen less often). If
you don't have a lot of computers on your network, you could set for
the longest time possible. Still if there is an issue with the
computer receiving DHCP OFFER messages from the router or if the
router isn't sending them properly, this could continue.

what router model and hardware revision and what firmware version?

On Sun, 21 Oct 2007 01:18:01 -0700, Walter M
<WalterM@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Just an update.

I lost connectivity again once yesterday and when I ran ipconfig /all before
rebooting (forgot to copy/paste!) I noted that the "Lease Expires" value was
in the past.. Could this be the immediate cause of the symptom?

This would then make my question "What causes this value to update in XP,
and what might cause it not to update at appropriate times?" Observation
suggests that a new 24-hour lease is "obtained" at approximately 12-hourly
intervals - currently at 09.10 local time it's showing "Lease Expires 22.59"
today.

Or am I on the wrong track?

Walter


"Walter M" wrote:

Current response from ipconfig /all (while all working well) is:

Windows IP Configuration

Host Name . . . . . . . . . . . . : walter-df1186df
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : lan

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast
Ethe
rnet NIC
Physical Address. . . . . . . . . : 00-15-F2-57-66-7A
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.1.64
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DNS Servers . . . . . . . . . . . : 192.168.1.254
Lease Obtained. . . . . . . . . . : 19 October 2007 09:49:17
Lease Expires . . . . . . . . . . : 20 October 2007 09:49:17

Will do again and also /flushdns when I next lose connectivity and post
again.

Thanks

Walter

"Barb Bowman" wrote:

from an command prompt run

ipconfig /flushdns

does this fix the issue?

please post the text output from ipconfig /all run from the command
prompt.


--

Barb Bowman
MS Windows-MVP
http://www.microsoft.com/windowsxp/expertzone/meetexperts/bowman.mspx
http://blogs.digitalmediaphile.com/barb/
.

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