Forum Discussion

neeeewbie's avatar
neeeewbie
Icon for MVP rankMVP
Nov 08, 2024

Change LB priority based on status

Hi I need help!

Load balance traffic between server A (IP: 1.1.1.1) and server B (IP: 1.1.1.2).
When server A goes down, traffic should be sent to server B.
Even when server A comes back up, traffic should be sent only to server B until server B goes down, and no traffic should be sent to server A.

The same thing happens in reverse.

When server B goes down, traffic should be sent to server A.
Even when server B comes back up, traffic should be sent only to server A until server A goes down, and no traffic should be sent to server B.

Is this setup possible in F5?

 

thank you

application delivery
  • Aswin_mk's avatar
    Aswin_mk
    Icon for Cumulonimbus rankCumulonimbus
    Nov 08, 2024

    Hi ,

     

    I only tried this backup method with priority group activation, but it will not work like this

    FOR Eg :) if server A have high priority

    • When both servers are available:
      • Traffic is directed to the server with the highest priority (e.g., Server A).
      • Server B (lower priority) remains on standby and does not receive traffic unless Server A fails.
    • If Server A goes offline:
      • Server B (backup) starts receiving traffic because it becomes the highest available priority member.
    • If Server A comes back online:
      • Traffic automatically returns to Server A due to its higher priority.

    This is an option for backup server(if you need both servers accept connection, this is not expected solution)

     

    Also could u please check manual resume is fine for u, its more near for your request. - Overview of the Manual Resume feature for BIG-IP LTM monitors

    Try this as well in your servers 

     

    BR

    Aswin