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Cisco Bug: CSCvi86630 - Crash due appnav SYN-ACK packets without a flow

Last Modified

Jun 14, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

15.5(3)S6.1

Description (partial)

Symptom:
Router reload when asymmetric (SYN-ACK) packets are received by Appnav Router


Conditions:
This will hit when multiple threads process the SYN-ACK packet.
Since ,there is no flow found for this SYN-ACK, a flow query is sent to the other SC in the Cluster, and the flow query response marks this flow to be redirected.
But, both these threads points to the same FO(flow Object),and this FO doesn't have a valid SN in it.
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