Planning zoning for a MetroCluster configuration with array LUNs

Switch zoning defines paths between connected nodes based on the node’s unique WWN. Sketching out the zoning plan enables you to correct errors before zones are configured, and makes it easier to communicate zoning information to the person who configures the switches.

You can use the following example as a reference when determining your zoning plan. The example shows single-initiator zoning for a fabric-attached MetroCluster configuration. The lines in the following example represent zones rather than connections; each line is labeled with its zone number:

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In the sample illustration, four array LUNs are allocated on each storage array for the MetroCluster configuration. LUNs of equal size are provisioned on the storage arrays at both sites, which is a SyncMirror requirement. Each FC initiator port on each Data ONTAP system has a path to each of its LUNs on the storage arrays. The ports on the storage array are redundant, and are configured as follows:

  • Storage array 1
    • Ports 1A and 2A are a redundant port pair.
    • Ports 1B and 2B are a redundant port pair.
    • In each port pair, both ports can access LUNs 1 through 4 because they are alternate paths.
  • Storage array 2
    • Ports 1A and 2A are a redundant port pair.
    • Ports 1B and 2B are a redundant port pair.
    • In each port pair, both ports can access LUNs 1 through 4 because they are alternate paths.

Switches are zoned so that there are only two paths to each array LUN, one unique path from each FC initiator port on a Data ONTAP system through each switch. If there are multiple connections between a Data ONTAP system and the switch, the best practice recommendation is to put each connection into a separate zone.

The following table shows the zones for this example:

Zone Data ONTAP system and FC initiator port Storage array port
Switch 1
z1 vs1:Port 0a Storage array 1:Port 1A
z5 vs1:Port 0c Storage array 2:Port 1B
Switch 2
z3 vs1:Port 0b Storage array 2:Port 2B
z7 vs1:Port 0d Storage array 1:Port 2A
Switch 3  
z2 vs2:Port 0a Storage array 2:Port 1A
z6 vs2:Port 0c Storage array 1:Port 1B
Switch 4  
z8 vs2:Port 0d Storage array 2:Port 2A
z4 vs2:Port 0b Storage array 1:Port 2B