Administrator Guide

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, 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.
• Additional updates to connections (including aging updates) that are learnt on VLT lag members are synced to the peer.
• When receiving an iSCSI login request on a non-VLT interface followed by a response from a VLT interface, the session is not synced
since it is initially learnt on a non-VLT interface through the request packet.
• The peer generates a new connection log that sees the login response packet. If the login response packet uses the ICL path, it is seen
by both the peers, which in turn generate logs for this connection.
Enable and Disable iSCSI Optimization
The following describes enabling and disabling iSCSI optimizaiton.
NOTE:
iSCSI monitoring is disabled by default. iSCSI auto-configuration and auto-detection is enabled by default.
If you enable iSCSI, flow control is automatically enabled on all interfaces. To disable flow control on all interfaces, use the no flow
control rx on tx off command and save the configuration. To disable iSCSI optimization, which can turn on flow control again on
reboot, use the no iscsi enable command and save the configuration.
When you enable iSCSI on the switch, the following actions occur:
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iSCSI Optimization