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Forum Discussion

nanukanu_263047's avatar
nanukanu_263047
Icon for Nimbostratus rankNimbostratus
May 30, 2016

Related to FAILOVER

Hi,

 

I have some questions with FAILOVER, documentation says:

 

IF VCMP provisioned:

 

-A unicast static self IP associated with internal (HA recommended.

 

-The unicast virtual management IP address assigned to the guest. This second one it's strictly necessary? Why can put only HA Interface?

 

Thanks!

 

application delivery
LTM

9 Replies

  • Yann_Desmarest's avatar
    Yann_Desmarest
    Icon for Cirrus rankCirrus
    May 30, 2016

    Hi,

     

    We run network failover on the self ip in several HA deployment on vCMP enabled guests and it works fine without any issues.

     

    I think that you should test a failover without configuring the unicast mgmt addr and see the results.

     

    • nanukanu_263047's avatar
      nanukanu_263047
      Icon for Nimbostratus rankNimbostratus
      May 30, 2016
      Sorry Yann, the correct question is: Why can't just put only HA Interface? Actually works, with only HA vlan, but documentation says HA + MGMT, and i'm finding some logical interpretation for that. Regards!!
    • Yann_Desmarest's avatar
      Yann_Desmarest
      Icon for Cirrus rankCirrus
      May 30, 2016
      Though it's written in the documentation, there is several scenario you can't apply this. For example when running vcmp guests in strict isolation mode. Having the mgmt interfaces in the failover config is a fallback to the self ip communication. Because the heartbeat can fail on the self ip network, having a different secondary network, the network failover is more reliable
  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    Icon for Nacreous rankNacreous
    May 30, 2016

    Hi,

     

    We run network failover on the self ip in several HA deployment on vCMP enabled guests and it works fine without any issues.

     

    I think that you should test a failover without configuring the unicast mgmt addr and see the results.

     

    • nanukanu_263047's avatar
      nanukanu_263047
      Icon for Nimbostratus rankNimbostratus
      May 30, 2016
      Sorry Yann, the correct question is: Why can't just put only HA Interface? Actually works, with only HA vlan, but documentation says HA + MGMT, and i'm finding some logical interpretation for that. Regards!!
    • Yann_Desmarest_'s avatar
      Yann_Desmarest_
      Icon for Nacreous rankNacreous
      May 30, 2016
      Though it's written in the documentation, there is several scenario you can't apply this. For example when running vcmp guests in strict isolation mode. Having the mgmt interfaces in the failover config is a fallback to the self ip communication. Because the heartbeat can fail on the self ip network, having a different secondary network, the network failover is more reliable
  • jaikumar_f5's avatar
    jaikumar_f5
    Icon for Noctilucent rankNoctilucent
    May 31, 2016

    The second one - MGMT interface is not mandatory. Its more of a redundancy kindof...