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Prerequisites

Contributors netapp-ahibbard netapp-sarajane
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When planning your SnapMirror active sync deployment, ensure you have met the various hardware, software, and system configuration requirements.

Hardware

  • Only two-node HA clusters are supported.

  • Both clusters must be either AFF (A-Series and C-Series) or ASA (A-Series and C-Series). Mixing between AFF and ASA is not supported. Replication is supported between AFF A-Series and C-Series.

Software

  • ONTAP 9.9.1 or later

  • ONTAP Mediator 1.2 or later

  • A Linux server or virtual machine for the ONTAP Mediator running one of the following:

ONTAP Mediator version

Supported Linux versions

1.9

  • Red Hat Enterprise Linux

    • Compatible: 8.4, 8.5, 8.6, 8.7, 8.9, 9.1, and 9.3 1

    • Recommended: 8.8, 8.10, 9.0, 9.2, 9.4, and 9.5

  • Rocky Linux 8 and 9

1.8

  • Red Hat Enterprise Linux: 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 8.10, 9.0, 9.1, 9.2, 9.3, and 9.4

  • Rocky Linux 8 and 9

1.7

  • Red Hat Enterprise Linux: 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, and 9.3

  • Rocky Linux 8 and 9

1.6

  • Red Hat Enterprise Linux: 8.4, 8.5, 8.6, 8.7, 8.8, 9.0, 9.1, 9.2

  • Rocky Linux 8 and 9

1.5

  • Red Hat Enterprise Linux: 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5

  • CentOS: 7.6, 7.7, 7.8, 7.9

1.4

  • Red Hat Enterprise Linux: 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5

  • CentOS: 7.6, 7.7, 7.8, 7.9

1.3

  • Red Hat Enterprise Linux: 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3

  • CentOS: 7.6, 7.7, 7.8, 7.9

1.2

  • Red Hat Enterprise Linux: 7.6, 7.7, 7.8, 7.9, 8.0, 8.1

  • CentOS: 7.6, 7.7, 7.8, 7.9

  1. Compatible means that RHEL no longer supports this version but ONTAP Mediator can still be installed.

Licensing

  • SnapMirror synchronous license must be applied on both clusters.

  • SnapMirror license must be applied on both clusters.

    Note If your ONTAP storage systems were purchased before June 2019, see NetApp ONTAP Master License Keys to get the required SnapMirror synchronous license.

Networking environment

  • Inter-cluster latency round trip time (RTT) must be less than 10 milliseconds.

  • Beginning with ONTAP 9.14.1, SCSI-3 persistent reservations are supported with SnapMirror active sync.

Supported protocols

  • Only SAN protocols are supported (not NFS/SMB).

  • Only Fibre Channel and iSCSI protocols are supported.

  • The default IPspace is required by SnapMirror active sync for cluster peer relationships. Custom IPspace is not supported.

NTFS Security Style

NTFS security style is not supported on SnapMirror active sync volumes.

ONTAP Mediator

  • The ONTAP Mediator must be provisioned externally and attached to ONTAP for transparent application failover.

  • To be fully functional and to enable automatic unplanned failover, the external ONTAP mediator should be provisioned and configured with ONTAP clusters.

  • The ONTAP Mediator must be installed in a third failure domain, separate from the two ONTAP clusters.

  • When installing the ONTAP Mediator, you should replace the self-signed certificate with a valid certificate signed by a mainstream reliable CA.

  • For more information about the ONTAP Mediator, see Prepare to install the ONTAP Mediator service.

Read-write destination volumes

Further information