Users Guide

In an iSCSI session, a switch connects CNA servers (iSCSI initiators) to a storage array (iSCSI targets) in a 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
● Enable iSCSI optimization so the switch autodetects and autoconfigures Dell EMC EqualLogic storage arrays that are directly
connected to an interface. iSCSI automatically configures switch parameters after connection to a storage device is verified.
Enable an interface to support a storage device that is directly connected to a port, but not automatically detected by iSCSI.
● Enable iSCSI session monitoring and the aging time for iSCSI sessions. iSCSI monitoring sessions listen on TCP ports 860
and 3260 by default.
● Configure the CoS/DSCP values applied to ingress iSCSI flows — create a class-iscsi class map in POLICY-CLASS-
MAP mode.
● Enable LLDP to use iSCSI. 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 storage traffic TCP/IP transport between servers and storage arrays in a network using iSCSI
commands.
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