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SteveEason's avatar
SteveEason
Icon for Cirrus rankCirrus
Jan 20, 2017

F5 HA: Active F5 is gone and can't force Standby to take over

I just started working with the F5's at my company and I'm still learning my way around everything. During my process of mapping out all our existing F5's I discovered that our staging F5 was setup with HA and the B device, which was Active, doesn't exist any longer. Oddly enough it still shows as Active and the light is green next to it. I logged into the F5 Viprion host and the actual F5 Guest is completely gone. It doesn't exist on either device (Viprion A or B).

 

So I need to force the existing F5 that is in Standby to take over as the Active device. I know that I'm going to have to setup a new "B" and then rebuild the HA pair. But until that happens, how do I force it to be the Active device?

 

And as part of that question, do I need to remove it from the HA to make it a Standalone device until that is done? If so, how do I accomplish this with the least interruption?

 

Thanks in advance!

 

application delivery
BIG-IP
high availability
LTM

1 Reply

  • KeesvandenBos's avatar
    KeesvandenBos
    Icon for MVP rankMVP
    Jan 20, 2017

    Hi Steve,

     

    You can remove the B device from the traffic and the device group. Leave the A device in the device group and remove the B device from the trusted device list. (this should make the A device active)

     

    After rebuilding the B device, add it to the trusted devices and back into the device group.

     

    Cheers,

     

    Kees