Web Tools Administrator's Guide (53-1001772-01, June 2010)

Web Tools Administrator’s Guide 187
53-1001772-01
iSCSI service overview
15
DRAFT: BROCADE CONFIDENTIAL
For additional information about iSCSI target gateway, refer to the Fabric OS Administrator’s Guide.
Saving changes
There are several ways to save changes on the switch and apply them to the fabric (applies to the
iSCSI Target Gateway Admin module only):
• Apply—Click Apply and your changes are transfered from the Web Tools database to the
switches database and distributed throughout the fabric.
• Abort—Click Abort to cancel the changes before saving them. The configuration is restored to
the last saved data point.
• Clear All—The Clear All button, located in the menu bar of the iSCSI module, has the ability to
clear all parameters of the iSCSI target gateway databases, including virtual targets, iSCSI
initiators, discovery domains, discovery domain sets, and all CHAP users and associated
secrets. The IP interface information, however, is not deleted.
CAUTION
The Clear All button deletes the information from the database. Before you use the Clear All
function, perform a configUpload and save a backup of the iSCSI target gateway database.
LUN mapping Logical Unit Number mapping. The mapping of the virtual iSCSI target and the
physical Fibre Channel target One frontend LUN (VT LUN) maps to a backend LUN
(Fibre Channel LUN). The frontend LUN numbers can be different from the backend
LUN numbers.
Fibre Channel LUN The LUN identifier of the Fibre Channel target.
VT LUN Virtual target LUN. The LUN identifier of the iSCSI virtual target.
Fibre Channel virtual
initiator
(FC-VI) The iSCSI port looks like an F_Port to the rest of the system. There is one
Fibre Channel virtual initiator per iSCSI. The Fibre Channel proxy initiator solution is
used. FC-VI registers to the Name Server with its symbolic port name (PWWN) and
node name (NWWN). The FC-VI in the Name Server entry is created irrespective of
the host connectivity.
discovery domain (DD) Created between and iSCSI host and iSCSI targets using their IQN for the purpose of
iSCSI device access control.
discovery domain set
(DDSet)
Created using DDs. Can be configured to enable or disable the configuration for the
purpose of iSCSI device access control.
CHAP authentication Authenticates the initiators against a list of user names and passwords with CHAP
(Challenge Handshake Authentication Protocol) authentication in either one-way or
mutual.
IQN An iSCSI Qualified Name that indicates an iSCSI node name in a form that is of
human readable notation using the following syntax:
iqn.yyyy-mm.<reverse of DNS>:<optional iSCSI unique string>
GbE port Gigabit Ethernet port. Uses a copper CAT-5e cable for an IP connection to an RJ-45
copper connector. FC4-16IP has 8 ports of this type that support 1 Gbps speed.
PDU Protocol Data Unit. A unit of data with a header and an optional data section.
TABLE 17 iSCSI target gateway services terminology (Continued)
Term Definition