Manual Chapter : HA Common Elements

Applies To:

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BIG-IQ Centralized Management

  • 7.0.0
Manual Chapter

HA Common Elements

Configuring a high availability cluster ensures that if one BIG-IQ system goes offline, another BIG-IQ system can continue managing your devices without interruption.
When configuring auto failover, you'll also create or select an existing Data Collection Device (DCD) as a quorum device. A
quorum DCD
is used as the deciding vote to determine which BIG-IQ becomes active if communication is disrupted between the active and standby BIG-IQ in the HA pair, by determining which BIG-IQ it can communicate with. The quorum DCD can be part of a DCD cluster, but is not used as a standby BIG-IQ in an HA configuration.
  1. On the left, click
    BIG-IQ HA
    .
  2. Click the
    Add Standby
    button.
  3. In the
    IP Address
    field, type the discovery address you want to set up as the standby BIG-IQ.
    This is the same IP address the peers in a high availability configuration use to communicate.
  4. Type the administrative
    Username
    and
    Password
    for the system.
  5. Type the
    Root Password
    for the system.
  6. For the
    Failover setting
    , select an option for how you want to handle failing over to the standby BIG-IQ if an issue requires it.
    • If you want to manually fail BIG-IQ over to the standby BIG-IQ, select
      Manual Failover
      .
    • If you want BIG-IQ to automatically fail over to the standby BIG-IQ with no intervention from you, select
      Auto Failover
      .
    For auto fail over to work, you must have the following ports open on the active and standby BIG-IQ as well as the quorum DCD.
    • TCP port 2224
    • UDP port 5404
    • UDP port 5405
  7. For auto failover, you must associate a quorum DCD. If you do not have a DCD set up, click the
    Set Up Quorum Device
    button to specify the DCD you want to use. If you've already have a Quorum DCD for auto failover, select it from the list and type its
    Root Password
    .
    • If you do not have a DCD set up, click the
      Set Up Quorum Device
      button to specify the DCD you want to use.
    • you already have a Quorum DCD for auto failover, select it from the list and type its
      Root Password
      .
  8. If you want BIG-IQ to use a floating IP address when automatically failing over to the standby BIG-IQ, select the
    Enable Floating IP
    Enable
    check box and type the address.
    The floating IP address must be on the same network segment as the local management address (interface eth0) of the BIG-IQ systems in the HA configuration, and not any of the discovery addresses (self IP addresses). This does not restrict HA traffic; HA traffic can be on any of the available interfaces.
    Floating IP addresses are not supported if your BIG-IQ active and standby systems in an HA pair are in a public cloud environment, such as AWS, Azure, or VMware.
    If you choose not to use a floating IP address and the active BIG-IQ fails over, you'll have to manually redirect your application traffic to the previously-designated standby BIG-IQ, which becomes the active BIG-IQ during failover.
  9. Click the
    Add
    button to add this device to this high availability configuration.
The active BIG-IQ discovers the standby BIG-IQ and displays its status.