302 iSCSI gateway service
At the iSCSI gateway port, the incoming iSCSI data is converted to FCP (SCSI on FC) by the iSCSI virtual
initiator, and then forwarded to the FC target. This allows low-cost servers to leverage an existing FC
infrastructure.
To represent all iSCSI initiators and sessions, each iSCSI portal has one iSCSI virtual initiator (VI) to the FC
fabric that appears as an N_Port device with a special WWN format. Regardless of the number of iSCSI
initiators or iSCSI sessions sharing the portal, Fabric OS uses one iSCSI VI per iSCSI portal.
Figure 34
shows the interaction of different layers from the iSCSI initiator stack to the FC target stack,
including the iSCSI gateway service used during protocol translation.
Figure 34
iSCSI-to-FC translation
Basic vs. advanced LUN mapping
Fabric OS provides the following two methods to map physical FC targets (LUNs) to iSCSI virtual targets
(VTs):
•
”
Basic LUN mapping
”
•
”
Advanced LUN mapping
”
Basic LUN mapping
Fabric OS provides a mechanism that maps LUNs to iSCSI VTs, a one-to-one mapping with unique iSCSI
Qualified Names (IQNs) for each target. It presents an iSCSI VT for each native FC target to the IP network
and an iSCSI VI for each iSCSI port to the FC fabric.
The following figure shows a basic LUN mapping scenario for an FC target with four LUNs.
Figure 35
iSCSI VT basic LUN mapping
Advanced LUN mapping
SCSI VTs can be mapped to more than one physical FC target, and the LUNs can be mapped to different
virtual LUNs.
Figure 36
shows an advanced mapping scenario.
iS C S I gateway s ervic e
S torage
(device s erver)
S C S I
F C P
F C
F C target
Application
S C S I
iS C S I
T C P /IP
iS C S I initiator
F C P (F C -4)
F C (F C -2/F C -3)
iS C S I
T C P /IP
iS C S I virtual
initiator (V I)
iS C S I virtual
target (V T )
40. 3
iS C S I virtual target (V T )
2
3
0
1
LUN
F C target
2
3
0
1
LUN
40. 9
Содержание A7533A - Brocade 4Gb SAN Switch Base
Страница 1: ...HP StorageWorks Fabric OS 6 2 administrator guide Part number 5697 0016 Edition May 2009 ...
Страница 24: ...24 ...
Страница 99: ...Fabric OS 6 2 administrator guide 99 ...
Страница 100: ...100 Managing user accounts ...
Страница 118: ...116 Configuring standard security features ...
Страница 164: ...162 Configuring advanced security features ...
Страница 234: ...232 Installing and maintaining firmware ...
Страница 268: ...266 Administering advanced zoning ...
Страница 284: ...282 Configuring Enterprise class platforms ...
Страница 292: ...290 Routing traffic ...
Страница 294: ...292 Interoperability for merged SANs ...
Страница 302: ...300 Configuring the Distributed Management Server ...
Страница 334: ...332 iSCSI gateway service ...
Страница 340: ...338 Administering NPIV ...
Страница 407: ...Fabric OS 6 2 administrator guide 405 ...
Страница 408: ...406 Using the FC FC routing service ...
Страница 438: ...434 Administering extended fabrics ...
Страница 460: ...456 Administering ISL trunking ...
Страница 498: ...494 Configuring and monitoring FCIP extension services 556200 Bps 30s avg 491394 Bps lifetime avg ...
Страница 516: ...512 FICON fabrics ...
Страница 526: ...522 Configuring and monitoring FICON Extension Services ...
Страница 540: ...536 Configuring the PID format ...
Страница 544: ...540 Understanding legacy password behavior ...
Страница 546: ...542 Mixed fabric configurations for non merge SANs ...
Страница 550: ...546 Migrating from an MP Router to a 400 MP Router ...
Страница 558: ...554 Inband Management ...
Страница 572: ...568 ...