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Cisco Bug: CSCuo37411 - ASR1K CPP crashes with stuck thread in ipv4_nat_pat_block_to_front

Last Modified

Apr 18, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.3(3)S 15.3(3.3)S3 15.4(1)S 15.4(2)S

Description (partial)

Under heavy load, CPP cpu utilization can become excessive, finally leading to stuck thread interrupt

The issue was seen while running CGN and PAP with BPA although in theory, the error could occur whenever there is a lot of churn on NAT translations and the number of PAT blocks associated with a pool becomes very large (on the order of 8-10 thousand)
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