Cisco Application and Content Networking System (ACNS) Software

Field Notice: Upgrades to ACNS 4.2.1 from Content Engines Previously Running Caching Software Can Fail

Revised November 8, 2002

Products Affected

  • CE-507

  • CE-560

  • CE-590

  • Cisco Application and Content Networking Software (ACNS) Version 4.2.1

Problem Description

Upgrades to ACNS Version 4.2.1 do not complete successfully if the Content Engine was previously upgraded from Cache 2.x to ACNS 4.x. Upgrades from Cache 2.x directly to 4.2.1 may not succeed. Upgrades from Content Engines that have only run ACNS should succeed.


A problem was introduced when upgrading from Cache 2.x to ACNS pre 4.2.1 that causes the upgrade to 4.2.1 to fail. In some cases the upgrade from Cache 2.x to ACNS 4.2.1 will also fail.

Problem Symptoms

Upgrades to 4.2.1 do not successfully complete.


To follow the link below and download software, you must be a registered user and you must be logged in.

Do not upgrade to ACNS 4.2.1. Instead, upgrade to ACNS 4.2.3, which is available from the Software Center (registered customers only) .

Note: This is cryptographic software that is under US export restrictions.


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



CSCdy35772 (registered customers only)

certain 4.x -> 4.2 upgrades fail due to stale v3 packet

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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