Setup Guide

NOTE: If you are using EqualLogic or Compellent storage arrays, more than 256 simultaneous iSCSI sessions are possible.
However, iSCSI session monitoring is not capable of monitoring more than 256 simultaneous iSCSI sessions. If this number is
exceeded, sessions may display as unknown in session monitoring output. Dell EMC Networking recommends that you disable
iSCSI session monitoring for EqualLogic and Compellent storage arrays or for installations with more than 256 simultaneous
iSCSI sessions.
Only sessions the switch observes are learned; sessions owing through an adjacent switch are not learned. Session monitoring learns
sessions that actually ow through the switch, it does not learn all sessions in the entire topology.
After a switch is reloaded, any information exchanged during the initial handshake is not available. If the switch picks up the communication
after reloading, it would detect a session was in progress but could not obtain complete information for it. Any incomplete information of
this type would not be available in the show commands.
Detection and Auto-Conguration for Dell EqualLogic Arrays
The iSCSI optimization feature includes auto-provisioning support with the ability to detect directly connected Dell EqualLogic storage
arrays and automatically recongure the switch to enhance storage trac ows.
The switch uses the link layer discovery protocol (LLDP) to discover Dell EqualLogic devices on the network. LLDP is enabled by default.
For more information about LLDP, refer to Link Layer Discovery Protocol (LLDP).
The following message displays the rst time a Dell EqualLogic array is detected and describes the conguration changes that are
automatically performed:
%STKUNIT0-M:CP %IFMGR-5-IFM_ISCSI_AUTO_CONFIG: This switch is being configured for optimal
conditions to support iSCSI traffic which will cause some automatic configuration to occur
including jumbo frames and flow-control on all ports; no storm control and spanning-tree port
fast to be enabled on the port of detection.
The following syslog message is generated the rst time an EqualLogic array is detected:
%STKUNIT0-M:CP %LLDP-5-LLDP_EQL_DETECTED: EqualLogic Storage Array detected on interface Te 1/
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• At the rst detection of an EqualLogic array, the maximum supported MTU is enabled on all ports and port-channels (if it has not
already been enabled).
• Spanning-tree portfast is enabled on the interface LLDP identies.
• Unicast storm control is disabled on the interface LLDP identies.
Conguring Detection and Ports for Dell Compellent Arrays
To congure a port connected to a Dell Compellent storage array, use the following command.
• Congure a port connected to a Dell Compellent storage array.
INTERFACE Conguration mode
iscsi profile-compellent
The command congures a port for the best iSCSI trac conditions.
The following message displays the rst time you use the iscsi profile-compellent command to congure a port connected to a
Dell Compellent storage array and describes the conguration changes that are automatically performed:
%STKUNIT0-M:CP %IFMGR-5-IFM_ISCSI_AUTO_CONFIG: This switch is being configured for optimal
conditions to support iSCSI traffic which will cause some automatic configuration to occur
including jumbo frames and flow-control on all ports; no storm control and spanning-tree port
fast to be enabled on the port of detection.
After you execute the iscsi profile-compellent command, the following actions occur:
iSCSI Optimization
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