Reference Guide

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-Configuration 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 reconfigure the switch to enhance storage traffic flows.
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 first time a Dell EqualLogic array is detected 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.
The following syslog message is generated the first 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 first 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 identifies.
• Unicast storm control is disabled on the interface LLDP identifies.
Configuring Detection and Ports for Dell Compellent Arrays
To configure a port connected to a Dell Compellent storage array, use the following command.
• Configure a port connected to a Dell Compellent storage array.
INTERFACE Configuration mode
iscsi profile-compellent
The command configures a port for the best iSCSI traffic conditions.
The following message displays 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 all interfaces on all ports and port-channels, if it is not already enabled.
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