Reference Guide

iSCSI Optimization | 361
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iSCSI Optimization
This chapter describes how to detect and configure switchports for Dell Compellent arrays. The topics
covered in this chapter include:
• iSCSI Optimization Overview
• Detection and Port Configuration for Dell Compellent Arrays
iSCSI Optimization Overview
iSCSI is a TCP/IP-based protocol for establishing and managing connections between IP-based storage
devices and initiators in a storage area network (SAN).
The following iSCSI feature is available on platforms
• Manual configuration to detect Compellent storage arrays where auto-detection is not supported.
Detection and Port Configuration for Dell Compellent Arrays
This feature is available on platforms
Switches support the
iscsi profile-compellent command to configure a port connected to a Dell Compellent
storage array. The command configures a port for the best iSCSI traffic conditions and must be entered in
INTERFACE Configuration mode.
The following message is displayed the first time you use the
iscsi profile-compellent command to
configure a port connected to a Dell Compellent storage array and describes the configuration 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:
• Jumbo frame size is set to 12000 for the S4810 and 9252 for S55 and S60 on all ports and
port-channels, if it is not already enabled.
• Spanning-tree portfast is enabled on the interface.
• Unicast storm control is disabled on the interface.