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VictorRuiz's avatar
VictorRuiz
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Nov 28, 2022
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Failover for specific virtual server

Hello everyone, I'm kinda new on F5 and i'm trying to learn about different failover mechanism. Let's supose we have an active/standby configuration and each device have 3 virtual server ( A, B and...
application delivery
  • Mohamed_Ahmed_Kansoh's avatar
    Mohamed_Ahmed_Kansoh
    Nov 28, 2022

    Hi VictorRuiz , 
    you can do it by HA score configuration , Configure it for the pool that assigned to required virtual server. 
    I see there is no difference to failover based on virtual server status (UP/Down) because if the virtual server’s pool became down , all traffic destinated to this virtual server would be resetted and F5 marks the virtual server down. 
    so I see you can confugure HA Group Score. 
    to configure it follow these article : 
    https://support.f5.com/csp/article/K42542000
    in this article you will find the videos that mihaic sent to you , and I think that this is the only way to meet your requirement. 
    I want to add. 
    > you can Isolate your configuration by creating 2 traffic groups , one for virtual server B and C whereas the other for your targgeted virtual sever A , let we name it (Virtual_server_A traffic group) . 
    > you will create new 2 floating ips address for traffic group 2 and put both of  them in Virtual_server_A traffic group , both of floating ips from external and internal vlan subnet respectively ( i mean client/server sides) to  listen and forward traffic for the Virtual_server_A traffic group. 
    also go to (local traffic >> virtual address >> and put your targgeted virtual server A on Virtual_server_A traffic group.
    > you can make this traffic group (Virtual_server_A traffic group) Active on the main F5 node with the other traffic group ( virtual server B , C ) , I mean both of traffic groups will be active on one node. 

    > until here , I did not make any differnece only created  new traffic group "Virtual_server_A traffic group" and two floating ips (one for client side from external vlan subnet and the other from server side from internal vlan subnet). 

    > After that  follow mihaic  video or article K42542000 , as you will  go to newly created traffic group (Virtual_server_A traffic group) and configure change its options to failover based on HA Score and create an new HA group score based on Pool and give it a score. 

    > the effect of this , you will isolate your issue and get a more granular control on "virtual server A" far from the rest of other virtual servers. 

    Regards.