Guest

Cisco SCE 1000 Series Service Control Engine

Field Notice: FN - 62525 - Protocol Pack Upgrade On Top of SCOS 3.0.3 Requires SCE Reboot


September 11, 2006

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

SCE 1010 SCOS 3.0.3 and Protocol Pack 5

SCOS - SCE Operating System

SCE 2020 SCOS 3.0.3 and Protocol Pack 5

SCOS - SCE Operating System

Problem Description

Protocol Pack 5 and any future Protocol Pack upgrade on top of SCOS 3.0.3 may trigger invalid memory access. The invalid memory access may result in unpredictable system behavior that can vary from errors reported in the debug log to a reload of the SCE.

Background

During Protocol Pack upgrade by the newly introduced Hitless Upgrade feature, there is a 100 msec window during which the SCOS may perform invalid memory access. Such an access can run code from an unpredictable address space, resulting in unpredictable results.

Problem Symptoms

Due to the unpredictable behavior of this bug, different errors may be indicated in the debug log. The following example represents SCOS memory problems that are expected to appear in the debug log:

RDB Party Context Manager: RDB_PRTY_GetType(partyContexPtr=0x0) failed to get rcid. 
RDB Party Context Manager: getRcidFromContextPointer(NULL) called, numRCIDs=29001, not good.

Invalid memory access can also cause the SCE to reload.

Workaround/Solution

Reboot the SCE after protocol pack upgrade on top of SCOS 3.0.3

or

Upgrade the SCE to SCOS 3.0.4. SCOS 3.0.4 is a maintenance release that contains the Protocol Pack 5 content, and corrects the exposure found, allowing future hitless upgrade to Protocol Pack 6 and later.

DDTS

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DDTS

Description

CSCse72906 (registered customers only)

Potentially invalid memory access during protocol pack upgrade

Revision History

Revision

Date

Comment

1.0

11-SEP-2006

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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