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Cisco Bug: CSCun06260 - XE3.13 Gatekeeper Hardening

Last Modified

Sep 09, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S3 15.3(2)S 15.3(3)S 15.4(3)S 15.5(2)S

Description (partial) 

Symptom:
High latency observed in customer network.

Conditions:
Under certain conditions, particularly under forced test conditions, it is possible to create scenarios where flow lock contention will be very high because of  NAT gatekeeper failures. This happens when a large amount of traffic that does not need to be NAT'd is sent through an interface that has NAT configured. Most traffic hitting a NAT interface should be sent through NAT. If not, it will cause issues around 1Gb of traffic.
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