Bug ID 746861: SFP interfaces fail to come up on BIG-IP 2x00/4x00, usually when both SFP interfaces are populated

Last Modified: Sep 23, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP Install/Upgrade, LTM(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 14.1.0,,,,,, 14.1.2,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,

Fixed In:
16.0.0, 15.1.4,

Opened: Oct 15, 2018
Severity: 3-Major


The SFP interfaces do not come up or flap up and down repeatedly on BIG-IP 2000/4000 on boot up when both SFP interfaces are populated. When interface flaps state changes such as those below are logged in ltm log: info pfmand[PID]: 01660009:6: Link: 2.1 is UP info pfmand[PID]: 01660009:6: Link: 2.1 is DOWN


Traffic cannot be sent/received from these interfaces.


Both SFP interfaces, 2.1 and 2.2, on BIG-IP 2000/4000 are populated. This is typically observed after an upgrade to an affected version.



Fix Information

The interfaces now come up successfully. Occasional link bounce may be seen on reboot.

Behavior Change