Iscsi Immediate Data And Unsolicited Data Features; Iscsi Interface Advanced Features - Cisco MDS 9000 series Configuration Manual

Configuring iSCSI
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
To configure a per-initiator iSCSI target's user name and password used by the switch to authenticate
itself to an initiator, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# iscsi initiator name
iqn.1987-02.com.cisco.initiator
switch(config-iscsi-init)#
Step 3
switch(config-iscsi-init)# mutual-chap
username testuser password abcd12AAA
switch(config-iscsi-init)# mutual-chap
username user1 password 7
!@*asdsfsdfjh!@df
switch(config-iscsi-init)# no
mutual-chap username testuser
Use the show running-config and the show iscsi global commands to display the global configuration.
Use the show running-config and the show iscsi initiator configured commands to display the initiator
specific configuration.(See the
output examples).

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.
If an iSCSI initiator supports immediate data and unsolicited data features, these features are
automatically enabled on the MDS switch with no configuration required.

iSCSI Interface Advanced Features

Advanced configuration options are available for iSCSI interfaces on a per-IPS port basis. These
configurations are similar to the advanced FCIP configurations and are already explained in that
section(see
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
4-26
"Displaying iSCSI Information" section on page 4-30
Advanced FCIP Profile Configuration, page 2-11
Purpose
Enters configuration mode.
Configures an iSCSI initiator using the iSCSI name of
the initiator node.
Configures the switch user account (testuser) along with
a password (abcd12AAA) specified in clear text
(default). The password is limited to 128 characters.
Configures the switch user account (user1) along with
the encrypted password specified by 7
(!@*asdsfsdfjh!@df).
Removes the switch authentication configuration.
for more information).
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
Chapter 4 Configuring iSCSI
for command