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Cisco Bug: CSCum13378 - ASR1K: %ATTN-3-SYNC_TIMEOUT and reassembly failure

Last Modified

Nov 27, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.1(3)S4 15.2(3)S 15.2(4)S3

Description (partial)

Symptom: A Cisco ASR 1000 Series router configured as an IPSec endpoint may fail to reassemble fragmented ESP packets. During this failure state, the router will also log %ATTN-3-SYNC_TIMEOUT errors.
Conditions: This symptom occurs due to UDP packet of a specific size received on the clear side of the device.
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