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Cisco Bug: CSCvt88558 - [BP-ICUPS-CUSP]: sn-tcp-rtt and sn-tcp-min-rtt values in EDR are observed 0 for many scenarios

Last Modified

Jun 19, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.20.A0.75358

Description (partial)

Symptom:
sn-tcp-rtt and sn-tcp-min-rtt values in EDR are observed as 0 for CUSP enabled flows

Conditions:
When CUSP feature is enabled on full-VPP, issue is observed in following conditions
1. Flow gets terminated due to Idle-timeout 
2. Forceful termination of subscriber/default-bearer on mid-flow
3. When TCP Reset is received on a flow and it doesn’t get cleared from VPP data-path within certain time limit.
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