Install Guide

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
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● At the first 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 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 the maximum 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.
Synchronizing iSCSI Sessions Learned on VLT-Lags with VLT-Peer
The following behavior occurs during synchronization of iSCSI sessions.
● If the iSCSI login request packet is received on a port belonging to a VLT lag, the information is synced to the VLT peer and
the connection is associated with this interface.
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