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Cisco Unity

Field Notice: FN - 62761 - Windows 2003 Service Pack 2 Install and CSA Compatibility with Unity on Certain Servers


May 31, 2007

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

Products Affected

Comments

UNI - MCS-7815-I2-ECS1

UNI - MCS-7815-I2-ECSP

UNI - MCS-7825-H2-ECS1

UNI - MCS-7825-I2-ECS1

UNI - MCS-7835-H2-ECS1

UNI - MCS-7835-I2-ECS1

UNI - MCS-7845-H2-ECS1

UNI - MCS-7845-H2-ECS2

UNI - MCS-7845-I2-ECS1

UNI - MCS-7845-I2-ECS2

UNITY

Releases 4.x and 5.0

Problem Description

The system freezes with a blue screen displayed with Cisco Security Agent (CSA) and Windows 2003 Service Pack 2. This anomaly may manifest with either the standalone CSA or the managed CSA.

This defect was discovered with CSA 5.0.0.201 with patched csatdi.sys per the associated software defect.

Background

Interactions between Microsoft Windows 2003 Scalable Network Features and the Cisco Security Agent might affect server performance. The Windows 2003 Scalable network feature can be installed via Microsoft Knoweldge Base Article 912222. It also comes bundled with Microsoft Windows Service Pack 2.

Customers running Windows 2003 SP1 who install the 'Microsoft Windows Server 2003 Scalable Networking Pack (SNP)'(Microsoft Knoweldge Base Article 912222) or who update Windows 2003 SP1 to SP2, may experience a BSOD or loss of network connectivity (for example, ping may work but file share access may fail) with any version of CSA. Customers who perform the Windows SNP install or SP2 update on a Unity server may also experience incoming call loss, loss of network connectivity, or a BSOD. These failures may occur because the Network Interface Card (NIC) and associated drivers support the new Microsoft TCP Chimney which allows TCP/IP processing to be offloaded to network adapters that can perform TCP/IP processing in hardware. Windows will automatically enable the TCP Chimney when installing the SNP or updating to SP2 if the NIC and associated drivers support the TCP Chimney.

Problem Symptoms

The affected server will exhibit the "blue screen" (BSOD) display, resulting in Unity failures.

Workaround/Solution

Workaround:

To quickly determine if the Microsoft TCP Chimney is enabled on your hardware, you can do one of the following tests:

  1. Check in the Windows registry at:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

    If the key EnableTCPChimney is present and its value is 0x1, then the TCP Chimney is installed and enabled.

  2. Use the Netsh.exe tool provided by Microsoft as part of this new software release and examine the TCP Chimney settings.

    Disabling the new Microsoft TCP Chimney will not cause any network failures and will not disable any Windows security features.

To disable the Microsoft TCP Chimney, do either of the following and then reboot Windows:

  1. To turn off TCP Chimney by using the Netsh.exe tool, follow these steps:

    1. Click Start, click Run, type cmd, and then click OK.

    2. At the command prompt, type: Netsh int ip set chimney DISABLED and press ENTER.

  2. Or, you can modify the following registry key in:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

    Change the key EnableTCPChimney value to 0x0.

Recovery:

Once the server sees this issue and displays the "blue screen", reboot the server and apply one of the workarounds shown above.

Solution:

CSA version 5.0.0.216 has the fix for this issue. This release may be obtained from the cisco.com Software Center.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCsi51247 (registered customers only)

BSOD on 7845-H2 with CSA and Windows 2003 SP2

CSCsi47438 (registered customers only)

Machine BSOD with CSA and Windows 2003 SP2

Revision History

Revision

Date

Comment

1.0

31-MAY-2007

Initial Public Release

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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