Forum Discussion

レザ's avatar
レザ
Icon for Cirrus rankCirrus
Aug 24, 2022

Using reselect method to keep http session persistence

Hi, I have two http servers behind a specific VIP, i'm using cookie method for persistency which working fine, The problem I have is that when one of the my pool members goes down, the users who we...
application delivery
reselect
Mohamed_Salah_'s avatar
Mohamed_Salah_
Icon for MVP rankMVP
Aug 24, 2022

Hello Nimbostratus,

what is the current Virtual server and backend server IP/port  ?

  • レザ's avatar
    レザ
    Icon for Cirrus rankCirrus
    Aug 24, 2022

    Hello 🙂

    Both virtual server and pool members are on same subnet, and service port is 80 (HTTP)

    for example:

    Virtual Server is: 192.168.23.254

    Server1: 192.168.23.180

    Server2: 192.168.23.181

     

    • Mohamed_Salah_'s avatar
      Mohamed_Salah_
      Icon for MVP rankMVP
      Aug 24, 2022

      Hello,

      you are right, you need to disable both translation to use this option based on the below article.

      Reselect option is only appropriate for:

      • Virtual servers with address and port translation disabled
      • Transparent pool members, such as firewalls, routers, proxy servers, and cache servers

      https://support.f5.com/csp/article/K15095

      It actually doesn't matter for the port translation. But regarding the address translaiton, the service will stop working because the address must be translated to the pool member.

       

      So based on this, unfortunately, i think you will not be able to use the reselect option.

      • Mike757's avatar
        Mike757
        Icon for MVP rankMVP
        Aug 24, 2022

        Forgive me if I'm reading this wrong, but Isn't everyone forgetting a little thing? Even is the reselect action was a valid option, the user would still need to login again on the "new" server.

        /Mike/