RE: Dropped Client Connections

Hello Customer,

Thank you for posting here. Let's also thank Larry for the good input.

According to your description, I understand that the SBS clients will lose
all network connection very often. The client reboot will recover it
temporary. If I have misunderstood the problem, please don't hesitate to
let me know.

First, please let me know that:

1. Do all clients lose network connection at same time?
2. Do you have single or double NICs on SBS?
3. Do you install ISA server 2004 on SBS?
4. Can you ping the SBS when the issue happen?

Based on my research, I suggest we try the following steps to see if we can
resolve this issue:

1. Please rerun the CEICW to make sure your SBS 2003 server have right
network configuration. Go through the follow KB and rerun CEICW carefully.

How to configure Internet access in Windows Small Business Server 2003
http://support.microsoft.com/kb/825763/en-us

2. If you have ISA server 2004 on SBS, please install ISA server 2004 sp3
to see if it help:

Microsoft? Internet Security and Acceleration (ISA) Server 2004 Standard
Edition Service Pack 3
http://www.microsoft.com/downloads/details.aspx?FamilyId=A05A074A-5033-4792-
AF8B-58B90D841436&displaylang=en

3. Do you install Windows server 2003 sp2 on SBS? If yes, please perform
the following steps:

1) Update the network adapter drivers
Contact the network adapter manufacturer or contact the original equipment
manager (OEM) for the computer to determine whether an updated network
adapter driver is available. You must have drivers that are compatible with
NDIS 5.2 or with a later version.
2) Modify the registry to disable Receive Side Scaling
a. Click Start, click Run, type regedit , and then click OK.
b. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
c. If the EnableRSS registry entry does not exist, create it. To do this,
follow these steps:
a) On the Edit menu, point to New, and then click DWORD Value.
b) In the New Value #1 box, type EnableRSS , and then press ENTER.

d. Right-click EnableRSS, and then click Modify.
e. In the Value data box, type 0 (zero), and then click OK.
f. Exit Registry Editor.

3) Disable offloading support
a. Click Start, click Run, type regedit , and then click OK.
b. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
c. In the details pane, right-click EnableTCPA, and then click Modify.

Note: If the EnableTCPA registry entry does not exist, create it. To do
this, follow these steps:
a) On the Edit menu, point to New, and then click DWORD Value.
b) In the New Value #1 box, type EnableTCPA , and then press ENTER.

d. In the Value data box, type 0 (zero), and then click OK.
e. Exit Registry Editor.
f. Restart the computer.

If we cannot resolve the issue after we perform the above steps, please
help me collect some information for further investigation:

1. Run command "ipconfig /all > c:\ipconfig_sbs.txt" and "route print >
c:\route_sbs.txt" on SBS, send the files c:\ipconfig_sbs.txt and
c:\route_sbs.txt to me at v-terliu@xxxxxxxxxxxxx

2. Run command "ipconfig /all > c:\ipconfig_client.txt" and "route print >
c:\route_client.txt" on problematic client, send the files
c:\ipconfig_client.txt and c:\route_client.txt to me at
v-terliu@xxxxxxxxxxxxx

3. Gather MPS network report on SBS:

a. Download MPSrepot_network from
http://download.microsoft.com/download/b/b/1/bb139fcb-4aac-4fe5-a579-30b0bd9
15706/MPSRPT_NETWORK.EXE

b. Run MPSRPT_NETWORK.exe on the server box.

c. The tool will automatically collect the information. This procedure will
take 10~15 minutes.

d. Open Windows Explorer, navigate to the folder:
%SystemRoot%\MPSReports\Network\Reports\Cab\

e. Send the .cab file directly to me at v-terliu@xxxxxxxxxxxxx

I hope these steps will give you some help.

Thanks and have a nice day!

Best regards,

Terence Liu(MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

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| Thread-Topic: Dropped Client Connections
| thread-index: Acgw3UBMXWKaOyobSwmVjpgoJDfFOA==
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| From: =?Utf-8?B?RGlja2ll?= <Dickie@xxxxxxxxxxxxxxxxxxxxxxxxx>
| Subject: Dropped Client Connections
| Date: Tue, 27 Nov 2007 02:07:00 -0800
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|
| I have a small SBS 2003 network. Most of the Clients are Wireless
connected
| laptops running XP Pro.For some reason every so often the clients just
drop
| all connections and the only way to reconnect back on to the domain is
either
| Softboot OR hardboot the PC. (This has also happened on a WIRED desktop,
so I
| don't think this is a wireless issue).
|
| Any help would be appreciated.
|
|

.