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Cisco Bug: CSCul31192 - ESP crash @ipv4_nat_alg_prune_sd

Last Modified

Apr 17, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.3(3)S 15.4(1)S 15.4(2)S

Description (partial) 

Symptom:
ESP crashed in processing ALG traffic. The crash points to tcp sequence delta code, like:
ipv4_nat_alg_prune_sd()
ipv4_nat_add_seq_delta()

Conditions:
1. NAT in CGN mode
2. High volume of ALG traffic with TCP transport
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  • Status
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