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Requirements for bunker replication

• Storage for the bunker SRL at the bunker site.
• Direct connectivity from the Primary to the bunker storage, or IP connectivity from the Primary to the bunker host.
• A system, referred to as the bunker host, with connectivity to the bunker SRL. The bunker host can be a relatively low-tier host, because it does not need to support running the application, but is used only to track and replay the writes to the bunker SRL.

  If the Primary will replicate to the bunker SRL using IP, the bunker host is required at all times.

  If the Primary will replicate to the bunker SRL using the STORAGE protocol, the bunker host is required only in the case of a Primary failure, to replay the pending writes from the bunker SRL to the Secondary. However, you must know the IP address at the time of setup.

• A VVR license is required for the bunker host.
• Network connection between bunker and Secondary.

  The network bandwidth over this connection need not be dedicated, because the connection is used only during the recovery process in case of a disaster.

• The bunker SRL must be the same size and the same name as the Primary SRL, or adding the bunker to the RDS fails.
• In a shared disk group environment, you cannot create the bunker itself in a shared disk group. However, you can attach a bunker to an RDS for which the Primary RVG or a Secondary RVG is on a shared disk group.