HP StorageWorks 2/32 common software and switch options version 3.0.x/4.0.x re - Page 12

Switch Options Descriptions and Requirements Administration Requirements You can administer ISL Trunking through Web Tools or through Fabric OS CLI. Cable Length Requirements The switches exchange a set of Extended Link Service to calibrate the latency of each link between them. In order to ensure optimal performance, the lengths of the shortest ISL in a trunk and longest should differ by no more than 30 meters; if they differ by more than 400 meters, they will not be included in the trunk. Long Distance Trunking Trunking is not supported with LE, L1, and L2 portcfglongdistance modes. Trunking is supported for normal E_Ports (referred to as L0 in portcfglongdistance command) with LWL media up to 5 km at the full speed permitted by the link. With LWL media, the throughput begins to fall off beyond 5 km, due to normal latency effects. QuickLoop Fabric Assist Overview and Support QuickLoop is an optionally licensed product that allows arbitrated loops to be attached to a fabric. Without modifying their drivers, private storage devices on the arbitrated loops can be accessed by public or private hosts elsewhere on the fabric. With the Zoning license that is provided by default, the set of storage devices visible to specific hosts can be carefully administered. QuickLoop Fabric Assist mode is also enabled, which allows private hosts on an arbitrated loop port to access any public or private storage device within the fabric, provided that they are assigned to a Fabric Assist mode zone. The QuickLoop and Zoning combination allows a private host to fully participate in a Storage Area Network (SAN). QuickLoop Fabric Assist is documented in the HP StorageWorks Quickloop Fabric Assist Version 3.0.x User Guide. QuickLoop is not Supported on Core Switches The StorageWorks Core switch and the StorageWorks SAN Switch 2/32 do not support Quickloop, in either its original hub emulation mode, or its Fabric Assist mode. This means that direct attachment of private hosts to the StorageWorks Core switch or the StorageWorks SAN Switch 2/32 is not supported. NOTE: Fabric or loop targets attached to the StorageWorks Core switch may be included in Fabric Assist Zones for private hosts attached to other switches in the fabric. 12 Common Software and Switch Options Version 3.0.x/4.0.x Release Notes