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Blue_whale's avatar
Blue_whale
Icon for Cirrocumulus rankCirrocumulus
Jan 13, 2022

What steps need to be followed if one of the HA device is out of order ?

Hi Experts ,   In production environment if one of the F5 device from HA pair goes out of order ( does not power on due to hardware issue ) , What steps we need to follow while replacing that d...
application delivery
BIG-IP
HA device failure
HA setup
LTM
new build
CA_Valli's avatar
CA_Valli
Icon for MVP rankMVP
Jan 13, 2022

Steps to be done will be:

  • license RMA unit
  • rekey RMA unit (f5mku) for succesful import of encrypted config
  • restore UCS backup using no-license option (that will include all HA configurations and certs already)

You can optionally force offline RMA unit until you're ready to have it inline, I don't remember if this has an impact on HA link communication, it used to in older versions

  • rack, wire (maybe only HA+mgt link first, then traffic links when unit has s.by role) & boot RMA unit
  • optionally, failover the cluster and confirm traffic flows as intended
  • success