Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

emilio_104458's avatar
emilio_104458
Icon for Nimbostratus rankNimbostratus
Jul 18, 2012

failover cable and network failover

Hi all,   i've a question about the failover.   I've a couple of f5 applaiance connected with failover cable and configured with network failover.     now i'm making some failover test and...
application delivery
availability
LTM
TMOS
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Aug 15, 2012
Hi Emilio,

 

 

I would not recommend using the preferred active/standby setting as it causes an unnecessary failover when the preferred active unit fails, the standby takes over and then the preferred active unit comes back online.

 

 

If you can use hardwire failover (the distance between the units is close enough), you should use hardwire failover:

 

 

sol2397: Comparison of serial failover and network failover features

 

https://support.f5.com/kb/en-us/solutions/public/2000/300/sol2397.html

 

 

Aaron