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Unable to make any new VPN connections to the ASA firewall, and the "IPSEC ERROR: Asynchronous operation failed " error message appears

Core issue

The new connections to the ASA firewall fail, and the ASA produces crypto accelerator errors. When this issue occurs, the IPSEC ERROR: Asynchronous operation failed syslog error message appears.

This issue appears due to the presence of Cisco bug ID CSCsd43563.

This issue is first identified in ASA version 7.1(1.2).


For a temporary workaround:

Issue the reload command in the ASA  in order to fix this issue.

In order to completely resolve this issue:

Upgrade the ASA version to  7.1.( 2.43 ) or later. In order to download the latest software, go to Cisco Downloads.

Version history
Revision #:
1 of 1
Last update:
‎06-17-2009 10:15 PM
Updated by:
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