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Cisco Bug: CSCun07779 - IPSec malfunctions when crypto ACL contains overlapping/duplicate entry

Last Modified

Nov 27, 2020

Products (1)

  • Cisco Adaptive Security Appliance (ASA) Software

Known Affected Releases


Description (partial)

When duplicate entry exists in a Crypto ACL, ikev1 and ikev2 shows unusual behaviors.

1. Ikev2 - here ASA creates multiple child SAs for the same pair of source and destination.
2. Ikev1 - unable to pass traffic (no encaps and decaps can be seen), even if the sa is up and both of the sides are using correct pair of SPIs.

This behavior is seen when a crypto access-list with a duplicate entry is applied to a crypto-map entry.
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