Users Guide

• At the rst detection of an EqualLogic array, an MTU of 12000 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:
• 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 Conguration 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-conguration 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 ow control is enabled and ow control settings are set to rx on tx off on the
interface. (If you enabled PFC on an interface, link-level ow 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 conguration 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 recongure any of the auto-provisioned conguration settings that result when you enable iSCSI on a switch.
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iSCSI Optimization