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Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 50 Configuring iSCSI
Configuring iSCSI
To configure a global iSCSI target user name and password to be used by the switch to authenticate itself
to an initiator using Fabric Manager, follow these steps:
Step 1 Choose End Devices > iSCSI in the Physical Attributes pane.
You see the iSCSI tables in the Information pane (see Figure 50-5).
Step 2 Select the Globals tab.
You see the global iSCSI configuration.
Step 3 Fill in the Target UserName and Target Password fields.
Step 4 Click the Apply Changes icon to save these changes.
To configure a per-initiator iSCSI target’s user name and password used by the switch to authenticate
itself to an initiator using Device Manager, follow these steps:
Step 1 Choose IP > iSCSI.
You see the iSCSI configuration (see Figure 50-10).
Step 2 Complete the Target UserName and Target Password fields for the initiator that you want to configure.
Step 3 Click Create to add this initiator to the Initiator Access List.
Configuring an iSCSI RADIUS Server
To configure an iSCSI RADIUS server, follow these steps:
Step 1 Configure the RADIUS server to allow access from the Cisco MDS switch's management Ethernet IP
address.
Step 2 Configure the shared secret for the RADIUS server to authenticate the Cisco MDS switch.
Step 3 Configure the iSCSI users and passwords on the RADIUS server.
iSCSI Immediate Data and Unsolicited Data Features
Cisco MDS switches support the iSCSI immediate data and unsolicited data features if requested by the
initiator during the login negotiation phase. Immediate data is iSCSI write data contained in the data
segment of an iSCSI command protocol data unit (PDU), such as combining the write command and
write data together in one PDU. Unsolicited data is iSCSI write data that an initiator sends to the iSCSI
target, such as an MDS switch, in an iSCSI data-out PDU without having to receive an explicit ready to
transfer (R2T) PDU from the target.
These two features help reduce I/O time for small write commands because it removes one round-trip
between the initiator and the target for the R2T PDU. As an iSCSI target, the MDS switch allows up to
64 KB of unsolicited data per command. This is controlled by the FirstBurstLength parameter during
iSCSI login negotiation phase.
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