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Cisco Bug: CSCur35191 - UDP checksum calculated incorrectly on GTPU when optimize and seq nums

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(21) 16.2.0.56515

Description (partial)

Symptom:
UDP packets carrying GTP-U protocol come out of the gtpu-service with incorrectly calculated checksums. Some customers have eNBs or SecGWs that drop such packets. This results in total outage.

Conditions:
if sequence number is configured in gtpu service of PGW.
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