Users Guide

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 1200 for all interfaces 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.
Enter the iscsi profile-compellent command in INTERFACE Configuration mode; for example:
Dell(conf-if-te-o/50# iscsi profile-compellent
Enable and Disable iSCSI Optimization
The following describes enabling and disabling iSCSI optimization.
NOTE: iSCSI monitoring is disabled by default. iSCSI auto-configuration and auto-detection are enabled
by default. Also, iSCSI session snooping is disabled and CAM allocation for iSCSI is set to 0.
When you enable iSCSI on the switch:
• If PFC is disabled on an interface, link-level flow control is enabled and flow control settings are set to
rx on tx off on the interface. (If you enabled PFC on an interface, link-level flow control cannot be
enabled.)
• iSCSI session snooping is enabled.
• iSCSI LLDP monitoring starts to automatically detect EqualLogic arrays.
The following message displays when you enable iSCSI on a switch and describes the configuration changes
that are automatically performed:
%STKUNIT0-M:CP %IFMGR-5-IFM_ISCSI_ENABLE: iSCSI has been enabled causing flow
control to be
enabled on all interfaces. EQL detection and enabling iscsi profile-compellent on
an interface
may cause some automatic configurations to occur like jumbo frames on all ports
and no storm
control and spanning tree port-fast on the port of detection.
You can reconfigure any of the auto-provisioned configuration settings that result when you enable iSCSI on
a switch.
When you disable the iSCSI feature, iSCSI resources are released and the detection of EqualLogic arrays using
LLDP is disabled. Disabling iSCSI does not remove the MTU, flow control, portfast, or storm control
configuration applied as a result of enabling iSCSI.
NOTE: By default, CAM allocation for iSCSI is set to 0. This disables session monitoring.
iSCSI Optimization 563