Bug ID 829661: TCP connection fails to establish when an SFC policy is enabled

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(all modules)

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4

Fixed In:
15.1.0

Opened: Sep 20, 2019
Severity: 2-Critical

Symptoms

TCP Connections fail to establish. Data transfer does not happen.

Impact

TCP Connections fail to establish. Data transfer does not happen.

Conditions

-- SFC chain is configured on the system. -- The configured SFC chain contains legacy servers (non-SFC) as part of the chain. -- A source port changes from one hop of the SFC chain to next hop.

Workaround

None.

Fix Information

There is a new db key 'TM.PortFind.Src_Preserve' that can be used to activate the fix. The fix tries to preserve the source port across SFC chains.

Behavior Change