ONTAP 9

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Ways to configure iSCSI SAN hosts with HA pairs

You can configure the iSCSI SAN hosts to connect to dual-node or multi-node configurations by using either one or multiple IP switches. You should determine whether you want a single-switch configuration that is not completely redundant or a multi-switch configuration that is completely redundant.

You can configure iSCSI SAN hosts with HA pairs on direct-attached, single-network, or multi-network environments. HA pairs can have multiple iSCSI connections to each switch, but multipathing software that supports ALUA is required on each host.

Direct-attachment

In a direct-attached configuration, one or more hosts are directly connected to the controllers.

Direct attachment configruation

Single-network HA pairs

In single-network HA pair configurations, one switch connects the HA pair to one or more hosts. Because there is a single switch, this configuration is not fully redundant.

Singe-network HA pair configuration

Multi-network HA pairs

In multi-network HA pair configurations, two or more switches connect the HA pair to one or more hosts. Because there are multiple switches, this configuration is fully redundant.

Multi-network HA pair configuration
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