HP 8/20q HP StorageWorks 8/20q Fibre Channel Switch QuickTools Switch Manageme - Page 21
Transparent Router - storageworks npiv
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Transparent Router IMPORTANT: The Simple SAN Connection Manager (SSCM) application version 2.10 or later can manage 8/20q Fibre Channel Switches with active TR_Ports; however, SSCM cannot manage or discover remote switches or devices in the remote fabric. Use QuickTools and the storage management interface to present Logical Unit Numbers (LUNs) to remote devices. SSCM displays the remote fabric as a grayed-out switch, but no management can be performed. SSCM version 2.0 and earlier versions do not support the management of fabrics that include 8/20q Fibre Channel Switches with active TR_Ports and may disrupt communication between the 8/20q Fibre Channel Switch and the remote fabric. The Transparent Router (TR) feature on the HP Storageworks 8/20q Fibre Channel Switch provides inter-fabric routing to allow controlled and limited access between devices on a 8/20q Fibre Channel Switch (local) fabric and devices on a B-series or C-series remote fabric. The local fabric may consist of one or multiple HP Storageworks 8/20q Fibre Channel Switches connected by their ISLs. A specific device attached to an 8/20q Fibre Channel Switch can be mapped with one or more devices in one remote fabric over only one TR_Port on that 8/20q Fibre Channel Switch. If a device attached to an 8/20q Fibre Channel Switch is mapped with multiple devices in the same remote fabric, the same TR_Port must be used. A device attached to a remote fabric can be mapped with multiple devices in multiple local fabrics. If a device in a remote fabric is mapped with multiple devices in the local fabric attached to a given 8/20q Fibre Channel Switch, the same TR_Port on the 8/20q Fibre Channel Switch must be used for all mappings involving that remote device. However, the same remote device can be mapped with other local devices attached to a different 8/20q Fibre Channel Switch in the same local fabric over a TR port from that switch. A remote device can be mapped through more than one TR port, as long as each of those TR ports is on a different HP StorageWorks 8/20q Fibre Channel Switch. Furthermore, you cannot map a local device to a remote device over an E_Port to another local switch and then over a TR_Port to the remote switch. The transparent route cannot include an E_Port on the local fabric. Local devices do not discover remote devices until the corresponding inter-fabric zones are activated on both the local and remote fabrics. To remove a mapping, in addition to removing the local inter-fabric zone, you must also remove the corresponding remote inter-fabric zone. NOTE: When a local device is mapped over a TR_Port to a remote device, the local device and its TR_Port appear as an N-Port ID Virtualization (NPIV) connected device in the remote fabric. It is possible, though not recommended, to map such a local device over a second TR_Port to a local device in a second local fabric. In this case, if you merge the two local fabrics, the transparent route becomes inactive for the devices that now have a path over an ISL, and an alarm is generated. For details of switches supported in a remote fabric, see release notes for the 8/20q Fibre Channel Switch, and the HP StorageWorks SAN Design Reference Guide located at the HP website: http://www.hp.com/go/sandesignguide. A user with admin authority can configure TR mappings to connect devices on the local 8/20q Fibre Channel Switch fabric with devices on remote fabrics. The transparent route between these devices is accomplished by connecting a remote switch to a TR_port on the 8/20q Fibre Channel Switch, mapping the devices together, and then creating and activating the IFZ (inter-fabric zones) in both fabrics. Each fabric contains a matching IFZ. Each IFZ must contain exactly three WWN members: the local device, the remote device, and the TR_Port attached to the remote fabric. HP StorageWorks 8/20q Fibre Channel Switch QuickTools Switch Management User Guide 21