Qlogic 5800V Series User Manual page 56

2–Managing Fabrics
Transparent Router
The local QLogic fabric may consist of one or multiple switches connected by their
ISLs. A specific device attached to a local switch can be mapped with one or more
devices in one remote fabric over only one TR_Port on that switch. If a device
attached to a QLogic 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 switch, the same TR_Port on that
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 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 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 will 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 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 the Release Notes for the
switch. A user (admin rights is required) can configure TR mappings to connect
devices on the local 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 switch, mapping the devices together, and then
creating and activating the IFZ (inter-fabric zones) in both fabrics. Each fabric will
contain 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.
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