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Cisco Bug: CSCtc65800 - A drop_pkt call could cause a double drop on a vfr packet

Last Modified

Feb 07, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

12.2(33)XND 12.2XN

Description (partial)

Symptom:

A virtual reassembly error message of the FRAG-REASSEMBLY_DBG type is seen and the traceback decode of the error message points to the ipv4 vfr refrag function indicating packet drop. The issue may cause another ATTN_NOTIFY timeout error message in about 4 minutes. 

Conditions:

The condition was observed under uRPF drop on broadband LNS virtual interface. In general other virtual reassembly drops at ipv4 vfr refrag due to malform fragments may trigger the issue.
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