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Cisco Bug: CSCup90021 - IKEv1 periodic DPDs sent per IPsec SA, not per IKE

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

15.2(4)M6.1 15.4(2)T1

Description (partial)

- IOS sending multiple periodic DPDs at once for the same IKE session
- peer responding to DPDs one by one resulting in IOS throwing below message due to received response not related to most recent DPD 

Jul 15 13:52:35.432: ISAKMP:(1001):R-U-THERE-ACK sequence number 0x7AA2567 does not correspond to expected value 0x7AA2568

- on-demand DPDs configured (no matter if on-demand or periodic)
- multiple IPsec SAs
- loss of decrypts on those multiple SAs at the same time
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