Reference Guide

In an iSCSI session, a switch connects CNA servers (iSCSI initiators) to a storage array (iSCSI targets) in a storage area
network (SAN) or TCP/IP network. iSCSI optimization running on the switch uses dot1p priority-queue assignments to ensure
that iSCSI traffic receives priority treatment.
iSCSI configuration notes
● When you enable iSCSI optimization, the switch auto-detects and auto-configures for Dell EqualLogic storage arrays directly
connected to an interface. iSCSI automatically configures switch parameters after connection to a storage device is verified.
You must manually enable an interface to support a storage device that is directly connected to a port, but not automatically
detected by iSCSI.
● By default, iSCSI monitoring sessions listen on TCP ports 860 and 3260. Enable iSCSI session monitoring and the aging time
for iSCSI sessions.
● Configure the CoS/DSCP values applied to ingress iSCSI flows — create a class-iscsi class map in POLICY-CLASS-
MAP mode.
● iSCSI operation requires LLDP to be enabled. The DCBX application TLV carries information about the dot1p priorities to use
when sending iSCSI traffic. This informational TLV is packaged in LLDP PDUs. You can reconfigure the 802.1p priority bits
advertised in the TLVs.
Configure iSCSI optimization
The iSCSI protocol provides TCP/IP transport of storage traffic between servers and storage arrays in a network using iSCSI
commands.
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