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Vidhya_147819's avatar
Vidhya_147819
Icon for Nimbostratus rankNimbostratus
Mar 26, 2014
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LTM Failover HA Group vs Others

Hi All, Looking to see field inputs on HA group failover vs others. I have gone through the documentation. However, I will like to get field/deployment view of what you have at your customer sites and why, any gotchas while considering HA group failover?

 

Appreciate your time and inputs! Cheers, Vidhya

 

application delivery
availability
deployment
design
LTM
  • Sec-Enabled_658's avatar
    Sec-Enabled_658
    Mar 27, 2014

    In addition to Nathan's comments, I would add that HA groups are needed when setting up failover for Vcmp guests on the Viprion system. For Vcmp guests, Vlan failsafe does not seem to work and Gateway failsafe isn't suggested either. HA groups work good but as Nathan stated, you will have to change the way you do failovers as the "force to standby" doesnt work as expected anymore. If you try to failover the usual way, it will go to standby and then back to active because the HA group score takes precedence. When using HA groups, to failover, you simply update the score of one of the objects applying a score on the active box. (ex. change weight on poolA from 50 to 10) I have used HA groups via pools and have had good success.

     

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  • nathe's avatar
    nathe
    Icon for Cirrocumulus rankCirrocumulus
    Mar 26, 2014

    I've used HA Groups or "Fast Failover" when I configured trunks on the BIG-IPs. As the name suggests it's faster than other types of failover e.g. VLAN Failsafe and works well.

     

    The only gotcha was that with this configured you can no longer use "Force to Standby" feature. See the following sol SOL14515

     

    Hope this helps,

     

    N

     

  • Sec-Enabled_658's avatar
    Sec-Enabled_658
    Icon for Cirrostratus rankCirrostratus
    Mar 27, 2014

    In addition to Nathan's comments, I would add that HA groups are needed when setting up failover for Vcmp guests on the Viprion system. For Vcmp guests, Vlan failsafe does not seem to work and Gateway failsafe isn't suggested either. HA groups work good but as Nathan stated, you will have to change the way you do failovers as the "force to standby" doesnt work as expected anymore. If you try to failover the usual way, it will go to standby and then back to active because the HA group score takes precedence. When using HA groups, to failover, you simply update the score of one of the objects applying a score on the active box. (ex. change weight on poolA from 50 to 10) I have used HA groups via pools and have had good success.

     

    • Vidhya_147819's avatar
      Vidhya_147819
      Icon for Nimbostratus rankNimbostratus
      Mar 27, 2014
      Thanks Nathan! Will not be using vcmp, but still HA group seems to be a good option. Thanks much. If you can kindly share any production issues faces with HA group or something to be aware of when designing, will very much apprecaite it!