HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, December 2009)
256 iSCSI Gateway services
Figure 22 shows an iSCSI gateway that has three iSCSI VTs and two iSCSI initiators.
Figure 22 IQN example
You may create a different IQN prefix using the iscsiSwCfg --modifygw -t <tgtname> command.
The prefix portion may be used to identify companies or organizations (e.g., Microsoft). Your organization
may suggest or require a specific format for the prefix portion of the IQN.
Changing and displaying the IQN prefix
1. Connect and log in to the switch.
2. Issue the iscsiSwCfg --modifygw -t <tgtname> command, where
<tgtname> is the value you
want to use as the IQN prefix to change the IQN prefix:
switch:admin>iscsiswcfg --modifygw -t iqn.2007-10.com.brocade
The operation completed successfully
3. Issue the iscsiSwCfg --showgw command to display the IQN prefix.
switch:admin> iscsiswcfg --showgw
Target name is: iqn.2007-10.com.brocade
The operation completed successfully
Access control with discovery domains
You can limit access to iSCSI VTs using a discovery domain (DD), a group of the iSCSI initiators and iSCSI
VTs. The iSCSI initiators can access only the iSCSI VTs that are in the same discovery domain.
Discovery domains are grouped together in a discovery domain set (DDSet). The active discovery domain
set enforces the fabric-wide iSCSI VT access. Only the DDs in the active DDSet are enforced. You can
create multiple discovery domain sets but only one set can be active at a time.
It is also possible to present a single iSCSI portal IP address to the iSCSI initiator when the default iSCSI
port configuration is in effect, and connection redirection is disabled on the blade.
The following figure shows a discovery domain set (DDSet 1), which contains two discovery domains (DD1
and DD2). When DDSet 1 is active, iSCSI initiator A can access only iSCSI VT 1 and iSCSI initiator B can
access only VT 2 and VT 3.
IP Network
iS CS I gateway s ervice
iSCSI virtual targets (VTs)
iS CS I initiator A
iS CS I initiator B
VT 1
VT 2
VT 3
iiqn.2003-11.com.micros oft:win2k-s n-192168102
iqn.2003-11.com.micros oft:win2k-s n-192168101
iqn.2002-12.com.brocade:10:00:00:05:1e:aa:bb:cc
iqn.2002-12.com.brocade:10:00:00:05:1e:cc:bb: aa
iqn.2002-12.com.brocade:10:00:00:05:1e:bb: cc: aa