Configuring Detection And Ports For Dell Compellent Arrays; Synchronizing Iscsi Sessions Learned On Vlt-Lags With Vlt-Peer; Enable And Disable Iscsi Optimization - Dell S6000–ON Configuration Manual

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.
• 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

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
464
iSCSI Optimization