Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
12.1.1, 12.1.0, 12.0.0, 11.6.1, 11.6.0, 11.5.3, 11.5.2, 11.5.1, 11.5.0, 11.4.1, 11.2.1
Fixed In:
13.0.0, 12.1.2, 11.6.1 HF2, 11.5.4 HF3
Opened: May 06, 2016 Severity: 3-Major Related Article:
K47203554
Server shutdown is propagated to client after X-Cnection: close transformation.
Client side connections are closed by the BIG-IP system too early, causing subsequent requests to be dropped.
In OneConnect configurations, when a server's maximum number of keep-alives is exceeded, the server closes the connection between itself and the BIG-IP system. This Connection: Close is transformed to an X-Cnection: close and sent to the Client along with a TCP FIN.
Set the OneConnect profile "Maximum Reuse" value to 2 below the value of the pool members max keep-alive setting. This forces OneConnect to close the connection before the pool member.
Server shutdown is no longer propagated to client after X-Cnection: close transformation, so client side connections are now kept open by the BIG-IP system as expected, and subsequent requests are no longer dropped.