Connectivity Guide

Table Of Contents
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 trac receives priority treatment.
iSCSI conguration notes
Enable iSCSI optimization so the switch auto-detects and auto-congures Dell EMC 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.
Enable iSCSI session monitoring and the aging time for iSCSI sessions. iSCSI monitoring sessions listen on TCP ports 860 and 3260 by
default.
Congure the CoS/DSCP values applied to ingress iSCSI ows — 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 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 storage trac TCP/IP transport between servers and storage arrays in a network using iSCSI commands.
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