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#### Multipathing Software

Multipathing software enables you to define and control redundant physical paths to I/O devices such as storage devices and network interfaces. If the active path to a device becomes unavailable, the software can automatically switch to an alternate path to maintain availability. This capability is known as automatic failover. To take advantage of multipathing capabilities, you must configure the server with redundant hardware, such as redundant network interfaces or two host bus adapters connected to the same dual-ported storage array.

For the server, three different types of multipathing software are available:

- Oracle Solaris IP Network Multipathing software provides multipathing and load-‐balancing capabilities for IP network interfaces. For instructions on how to configure and administer Oracle Solaris IP Network Multipathing, consult the IP Network Multipathing Administration Guide provided with your specific Oracle Solaris release.

- VVM software includes a feature called DMP, which provides disk multipathing as well as disk load balancing to optimize I/O throughput. For information about VVM and its DMP feature, refer to the documentation provided with the VERITAS Volume Manager software.

- StorageTek Traffic Manager is an architecture fully integrated within the Oracle Solaris OS (beginning with the Oracle Solaris 8 release) that enables I/O devices to be accessed through multiple host controller interfaces from a single instance of the I/O device. For information about StorageTek Traffic Manager, refer to your Oracle Solaris OS documentation.

##### Related Information

- Oracle Solaris OS Overview

- Oracle VM Server for SPARC Overview

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