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 trac receives
priority treatment.
iSCSI conguration notes
• When you enable iSCSI optimization, the switch auto-detects and auto-congures for Dell EqualLogic storage arrays directly connected
to an interface. iSCSI automatically congures switch parameters after connection to a storage device is veried. 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.
• Congure the CoS/DSCP values applied to ingress iSCSI ows — 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 trac. This informational TLV is packaged in LLDP PDUs. You can recongure the 802.1p priority bits advertised in the
TLVs.
Congure iSCSI optimization
The iSCSI protocol provides TCP/IP transport of storage trac between servers and storage arrays in a network using iSCSI commands.
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