You can use an iSNS (Internet Storage Name Service) server to discover targets.
Configuring the iSNS server eliminates the need for configuring every initiator for
every target. When numerous hosts exist on a network, configuring an iSNS server
saves time. An iSNS server provides a central management point for the group by
dynamically maintaining up-to-date information about the iSCSI target names for
group volumes.
If you are using an iSNS server, there is no need to discover targets by using the
specific target names in the command. The following diagram explains the interaction
between the appliance and the iSNS server.
Connect to target
iSNS server
Find list of targets or
credentials from the
iSNS server
iSCSI target array
NetBackup appliance
(Initiator)
Discovering targets by using iSNS
This section provides instructions for discovering iSCSI targets by using the Internet
storage name service (iSNS) method. Use this method if you have at least one
iSNS server on your network. This method enables the iSCSI initiator to discover
targets that are registered to the iSNS server. For this method, you must supply
the iSNS server address and/or port. The iSCSI initiator can then query the specified
iSNS server to discover targets. The default port for an iSNS server is 3205.
You can connect to a target only after discovering it. Review the following
considerations:
■ If you run the iSCSI > Target Discover Portal or iSCSI > Target Discover
iSNS command again after the targets are connected, it overrides the existing
connection settings like target credentials. If the target requires authentication,
you will need to enter the target credentials again when the existing sessions
are reconnected. The existing sessions need to be reconnected if the appliance
28Configuring iSCSI
Discovering targets by using iSNS
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