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Cisco Bug: CSCun21071 - Object groups within ACL sometimes mismatch

Last Modified

Apr 28, 2020

Products (81)

  • Cisco IOS
  • Cisco C897VA Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco VG204XM Analog Voice Gateway
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Known Affected Releases

15.3(3)M 15.4(1)T1

Description (partial)

Symptoms:
ACL using object groups is sometimes mismatching traffic due to a race condition between process switching and CEF switching while evaluating the object group.
Conditions:
ACL with object group   Significant traffic flowing in both process and CEF switching.
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