HP StorageWorks XPath OS 7.4.X Administrator Guide (AA-RVHDD-TE, February 2006)

82 Using the iSCSI Gateway Service
Working with the WWN mapping table
The WWN is an HP Organizational Unique Identifier (OUI).
You can use the iscsiWwnAlloc command to assign WWNs.
Displaying the WWN list
Issue the iscsiWwnAlloc command with no arguments.
You can use the aliShow, zoneShow, and cfgShow commands with the -i option to display IQNs.
Adding an iSCSI initiator to the WWN mapping table
Issue the following command on the primary iFCS router, where IQN_name is the IQN of the initiator:
iscsiwwnalloc -i IQN_name
Removing an iSCSI initiator from the WWN mapping table
Issue the following command:
iscsiwwnalloc -d IQN_name
If you cannot log in to the MP Router from an iSCSI initiator, there might be an error in
iSCSI-name-to-port-WWN mapping. Log in as admin. Issue the iscsiWwnAlloc command to display
the WWN allocation map. If there are two WWN entries for the initiator, perform the following steps:
1. If the IQN is used in zones or aliases, remove it from them.
2. Delete the IQN using the following command, where IQN_name is the IQN of the initiator:
iscsiwwnalloc -d IQN_name
3. Re-create the IQN by issuing the following command on the primary iFCS router, where IQN_name is
the IQN of the initiator:
iscsiwwnalloc -i IQN_name
4. If necessary, re-create the IQN in zones or aliases using the zoneCreate or aliCreate command.
Enabling and disabling failover
You can take advantage of the high availability (HA) failover feature by defining multiple iSCSI portals
from a TCP/IP network to a fabric. In this configuration, iSCSI drivers that support failover can fail over
from one portal to another if the connection to the first portal is lost.
For example, Figure 17 shows three iSCSI portals connecting a TCP/IP network to a fabric. IP1, the
primary, is on one MP Router (iSCSI Gateway 1); IP2 and IP3 are on a second MP Router (iSCSI Gateway
2). When HA failover is enabled, if the path including IP1 fails, the iSCSI initiator tries IP2, and if not
successful, IP3.