Command Reference Guide

iSCSI Optimization Commands
CLI Command Reference
September 2014 Page 681
HP Moonshot Switch Module CLI Command Reference
iscsi cos
This command sets the quality of service profile that will be applied to iSCSI flows. iSCSI flows are assigned by
default to the highest VPT/DSCP mapped to the highest queue not used for stack management. The user should
also take care of configuring the relevant Class of Service parameters for the queue in order to complete the
setting.
Setting the VPT/DSCP sets the QoS profile which determines the egress queue to which the frame is mapped.
The switch default setting for egress queues scheduling is Weighted Round Robin (WRR).
You may complete the QoS setting by configuring the relevant ports to work in other scheduling and queue
management modes via the Class of Service settings. These choices may include strict priority for the queue
used for iSCSI traffic. The downside of strict priority is that, in certain circumstances (under heavy high priority
traffic), other lower priority traffic may get starved. In WRR the queue to which the flow is assigned to can be
set to get the required percentage.
Example: The following example sets the quality of service profile that will be applied to iSCSI flows.
(Routing)(config)#iscsi cos vpt 5 remark
no iscsi cos
Use the no form of the command to return to the default.
iscsi enable
This command globally enables iSCSI awareness.
Example: The following example enables iSCSI awareness.
(Routing)(config)#iscsi enable
Format
iscsi cos {vpt vpt | dscp dscp} [remark]
Mode Global Config
Parameter Description
vpt/dscp The VLAN Priority Tag or DSCP to assign iSCSI session packets.
remark Mark the iSCSI frames with the configured VPT/DSCP when egressing the switch.
Format
no iscsi cos
Mode Global Config
Default
disabled
Format
iscsi enable
Mode Global Config