Last Modified: Jan 07, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11
Fixed In:
11.6.0, 11.5.2
Opened: Feb 24, 2014 Severity: 3-Major Related Article:
K16537
Unacknowledged TCP segments are not retransmitted.
This issue causes connection timeouts.
Remote endpoint closes TCP window early and drops incoming TCP segment(s) from BigIP. Affects Standard TCP virtuals.
This issue has no workaround.
Unacknowledged TCP segments are re-transmitted upon re-opening of window.