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Ah_Fat_2262's avatar
Ah_Fat_2262
Icon for Nimbostratus rankNimbostratus
Mar 27, 2012

F5 Failover

Hi,

 

 

I have deployed a pair of F5 LTM 1600 and have configured the redundancy and fail-over. Thus, I would like to ask that when the active F5 failover to the standby F5, is the failover a stateful failover? meaning to say that during a failover will the active connection to the Virtual Server on the active F5 being failover to the the standby thus there is interruption to the user connection?

 

 

I noticed that there is an option of "Connection Mirror" for Virtual Server. However, F5 website says the they recommend that to enable this option on Performance VS only.

 

 

Please advice.

 

config
design

2 Replies

  • nathe's avatar
    nathe
    Icon for Cirrocumulus rankCirrocumulus
    Mar 27, 2012
    Ah Fat

     

     

    There are two types of mirroring - connection and persistence. You're right, it's not the recommended option to enable connection mirroring - due to the overhead involved. I wouldn't enable it for http connections but possibly ftp / rdp / ssh etc.

     

     

    Persistence mirroring, on the other hand, is recommended. This means that on failover the standby appliance is aware of which pool member each connection is going to - this ensures a smooth failover (and hopefully invisible to the user). You don't need to mirror cookie persistence though - as this is client based.

     

     

    Hope this helps,

     

    N
  • Cholito_15468's avatar
    Cholito_15468
    Icon for Nimbostratus rankNimbostratus
    Mar 27, 2012

     

    hi,

     

     

    You can create a profile and persistence Enable this option.

     

    Trying cpu usage and monitoring.

     

     

    testing and monitoring the CPU consumption.