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Forum Discussion

JTrimble's avatar
JTrimble
Icon for Nimbostratus rankNimbostratus
Feb 10, 2011

High Availability HA Group not failing over

Hi there,     We have two F5 BigIP 3600's paired together in a high availability configuration. They are connected via serial port and we have two trunks set up with 2 members each. I have set...
application delivery
availability
LTM
TMOS
neo1674_66454's avatar
neo1674_66454
Icon for Nimbostratus rankNimbostratus
Apr 25, 2011
I'm currently working with a F5 engineer to try to isolate the root cause of this behavior. I have done some tests on a LAB environment and I think HA groups feature requires network failover to be in place, and possibly serial failover cable to be removed. If that's the case, then we could argue that the documentation needs to be reviewed and updated to clearly state this.

 

 

I'll keep you posted once the case is closed.
  • IanB's avatar
    IanB
    Icon for Employee rankEmployee
    Mar 20, 2017

    Just to add a very late reply here, HA groups absolutely require network failover to be enabled - this is what causes the BigIP to send udp failover packets containing the current state of the box. The serial failover is very simplistic and carries no state information - it's literally only indicating that the other box is powered on and active.