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Cisco Bug: CSCtb10776 - Inspection drops NIC-segmented packets when WScale is on

Last Modified

Feb 22, 2014

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(20)T3 12.4(21)

Description (partial)

Symptom:
Experiencing really low throughput on IOS platforms when ipv6 inspection is enabled along with TCP window-scaling.

Conditions:
1. TCP traffic with WindowScaling in use
2. ipv6 inspection enabled
3. using TCP offloading on the Server or Client side
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