IBM DS8000 manual HMC network topology

System and partition management

Customer access to the S-HMC is provided to allow the management of optional LPAR environments. This access allows for configuration, activation, and deactivation of logical partitions.

Service

The service function of the S-HMC is typically used to perform service actions such as a repair action, the installation of a storage facility or an MES, or the installation or upgrade of licensed internal code releases. These service actions can be accessed using the supplied S-HMC or a laptop or equivalent. The laptop will connect to the service port on the Ethernet switch (ESSNet) on the storage facility that is being serviced. This laptop needs to be configured for dynamic host configuration protocol (DHCP) before connecting to the ESSNet. The laptop will use the WebSM client to access the service functions on the S-HMC. The WebSM client is available for downloading to the laptop from the S-HMC.

Storage facility RAS

This component, together with the hardware, provides the reliability, availability, and serviceability functions of the DS8000. See Chapter 4, “RAS” on page 61 for a more complete description.

SMI-S CIM server

The SMI-S server is an implementation of the industry standard of the Storage Networking Industry Association (SNIA). The ESS API is implemented through the IBM TotalStorage Common Information Model Agent (CIM Agent) for the DS8000, a middleware application designed to provide a CIM-compliant interface. The CIM-compliant interface allows Tivoli® and third-party software management tools to discover, monitor, and control the DS8000. The DS8000 API and CIM Agent are provided with the DS8000 at no additional charge. The CIM Agent is available for the AIX, Linux, and Windows 2000 operating system environments.

Advanced Copy Services invocations

The same CIM server that is required to support storage configuration is also used to initiate Advanced Copy Services operations in a storage complex. The S-HMC is required only to initiate changes to the Copy Services environment. Existing Copy Services relationships (such as FlashCopy pairs or PPRC pairs) continue to operate as designed even in the absence of the S-HMC. Copy Services operations against Count Key Data (CKD) volumes can also be initiated through inband channel commands issued across ESCON/FICON channels from z/Series hosts. These commands are issued directly to the storage facility and can be executed without support from the S-HMC.

Note: All service interfaces require an authenticated login procedure to access service functions.

9.2.3 S-HMC network topology

In order to connect the S-HMC to your network, you will need the following network information:

￿One IP address per S-HMC. With an external S-HMC, you will need two IP addresses.

￿Host names for the S-HMCs (for example, MC1 and MC2).

￿Domain name for the S-HMC (for example, us.ibm.com®).

￿Whether you will use local time or a different time zone.

162DS8000 Series: Concepts and Architecture