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Cisco Bug: CSCuo04583 - SGSN requirement to include rwnd=(a_rwnd- current outstanding data ) > 0

Last Modified

Feb 06, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

12.0(34)

Description (partial)

Symptom:
12.0 47462 SW and Also seen in 14.0

Conditions:
With current design, we are taking care of two factors to check if new data packets cannot be sent:
1. a_rwnd = 0 ( Not happened since RNC always sending 336)
2. total bytes outstanding > current congestion window (False, 1040 < 5960)
So, with a_rwnd received as 336, we always send the data chunks limited by current congestion window(4*MTU)
The requirement is to allow the sending of new chunks if rwnd=(a_rwnd  - current outstanding data) is > 0.
So, we need to fix the same with 3rd additional condition to stop sending the chunk if rwnd is 0
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