Administrator Guide

The following message displays when you enable iSCSI on a switch and describes the configuration 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.
Configuring iSCSI Optimization
To configure iSCSI optimization, use the following commands.
1 For a non-DCB environment: Enable iSCSI.
CONFIGURATION mode
iscsi enable
2 (Optional) Configure the iSCSI target ports and optionally the IP addresses on which iSCSI
communication is monitored.
CONFIGURATION mode
[no] iscsi target port tcp-port-1 [tcp-port-2...tcp-port-16] [ip-address
address]
• tcp-port-n is the TCP port number or a list of TCP port numbers on which the iSCSI target
listens to requests. You can configure up to 16 target TCP ports on the switch in one command or
multiple commands. The default is 860, 3260.
Separate port numbers with a comma. If multiple IP addresses are mapped to a single TCP port,
use the no iscsi target port tcp-port-n command to remove all IP addresses assigned to
the TCP number.
To delete a specific IP address from the TCP port, use the no iscsi target port tcp-port-n
ip-address address command to specify the address to be deleted.
• ip-address specifies the IP address of the iSCSI target. When you enter the no form of the
command, and the TCP port you want to delete is one bound to a specific IP address, include the
IP address value in the command.
If multiple IP addresses are mapped to a single TCP port, use the no iscsi target port
command to remove all IP addresses assigned to the TCP port number.
To remove a single IP address from the TCP port, use the no iscsi target port ip-address
command.
3 (Optional) Set the QoS policy that is applied to the iSCSI flows.
CONFIGURATION mode
[no] iscsi cos {enable | disable | dot1p vlan-priority-value [remark] | dscp
dscp-value [remark]}
• enable: enables the application of preferential QoS treatment to iSCSI traffic so that iSCSI packets
are scheduled in the switch with a dot1p priority 4 regardless of the VLAN priority tag in the packet.
The default is: iSCSI packets are handled with dotp1 priority 4 without remark.
iSCSI Optimization 492