FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availability Planning Guide (AA-RS2DC-TE, June 2003)

Planning Considerations for Fibre Channel Topologies
113SAN High Availability Planning Guide
■ Intermix operation in Open Systems management style — When the
director or switch is set to Open Systems management style, a traditional
Fibre Channel fabric consisting of multiple domains (fabric elements) is
supported. Inband management through the OSMS is also supported. The key
concern in this environment is to avoid disrupting installed FCP devices when
connecting FICON devices to a director or switch, and modifying
configurations to facilitate FICON communication.
When operating in Open Systems management style, the HAFM application
does not use logical port addressing or display the Address Configuration
dialog box. Because the PDCM array is not supported, the host-based HCD
describes FICON connectivity requirements. In addition, be aware that
changes to the zoning configuration for FICON devices do not affect
connectivity, but do affect distribution of RSCNs.
■ Intermix operation in FICON management style— When the director or
switch is set to FICON management style, only a single domain (fabric
element) is supported. Inband management through the FMS is also
supported. Zoning can be layered on top of PDCM arrays to manage
connectivity for attached FCP devices. However, conflicts between zones and
PDCM arrays must be avoided.
When operating in FICON management style, ports are set to F_Port
operation, thus eliminating E_Port capability (and ISL and multiswitch fabric
capability).
■ Inband management implications — When using inband director or switch
management, either the FMS or OSMS feature is enabled (the servers are
mutually exclusive). When the FMS feature is enabled, the director or switch
is automatically set to FICON management style only. When the OSMS
feature is enabled, the director or switch can be set to Open Systems or
FICON management style.