Iscsi Cos - Dell PowerConnect 8024 Cli Reference Manual

Example
The following example sets the aging time for iSCSI sessions to 100 minutes.
console(config)#iscsi aging time 100

iscsi cos

The iscsi cos command sets the quality of service profile that will be applied to iSCSI flows. To
return to the default value, use the no form of this command.
Syntax
iscsi cos {vpt
no iscsi cos
vpt/dscp — The VLAN Priority Tag or DSCP value to assign iSCSI session packets.
•
remark — Mark the iSCSI frames with the configured VPT/DSCP when egressing the switch.
•
Default Configuration
See the user guidelines for default value information.
Command Mode
Global Configuration mode.
User Guidelines
iSCSI flows are assigned by default to the highest VPT/DSCP mapped to the highest queue not
used for stack management or the voice VLAN. Make sure you configure 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).
Complete the QoS setting by configuring the relevant ports to work in other scheduling and
queue management modes via the commands that control the Class of Service settings, such as
the 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.
console(config)#iscsi cos vpt 5 remark
330
iSCSI Flow Acceleration Commands
vpt dscp
| dscp } [remark]