Field Notice: FN - 63040 - ACE Module - TCP flow issues force removal of version c6ace-t1k9-mz.3.0.0_A1_6_2.bin from CCO - Software Upgrade Recommended

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.

Revision History

Revision	Publish Date	Comments
1.0	26-Feb-14	Initial Release
10.0	03-Oct-17	Migration to new field notice system

Products Affected

Affected Product ID	Comments
ACE04-6500-K9
ACE10-6500-K9
ACE20-MOD-K9

Defect Information

Defect ID	Headline
CSCsl23515	TCP:RTO doesnt fire in some conditions
CSCsl24291	ACE should honor a RST with Data even if a FIN was previously seen
CSCsk91129	ACE not always going into fast recovery retransmit when needed
CSCsl24338	Not all RHI routes are in the MSFC routing table after a ft failover

Problem Description

Several severe outstanding defects in the c6ace-t1k9-mz.3.0.0_A1_6_2 release have been resolved in the c6ace-t1k9-mz.3.0.0_A1_6_2a release. Cisco has removed the c6ace-t1k9-mz.3.0.0_A1_6_2 release from CCO.

Background

Cisco has discovered that several severe defects in the area of correctly handling TCP flows are present in the 3.0.0_A1_6_2 release. Cisco has addressed these issues in the 3.0.0_A1_6_2a release has decided to remove the 3.0.0_A1_6_2 release from CCO.

Problem Symptom

Users may encounter the following issues when running version 3.0.0_A1_6_2:

Not all RHI routes are in the MSFC routing table after a ft failover.

TCP:RTO doesnt fire in some conditions.

ACE does not always go into fast recovery retransmit when needed.

ACE will not honor a RST with Data even if a FIN was previously seen.

Workaround/Solution

To resolve these potential issues you will need to download and install software version c6ace-t1k9-mz.3.0.0_A1_6_2a.bin or the .zip version which can be found here - http://www.cisco.com/cgi-bin/tablebuild.pl/cat6500-ace.

Instructions for installing the software can be found here - http://www.cisco.com/en/US/partner/products/hw/modules/ps2706/prod_release_note09186a00806ad185.html

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:

• Open a service request on Cisco.com
• By email
• By telephone

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