Administrator Guide
Enter the iscsi profile-compellent command in INTERFACE Conguration mode; for example:
Dell(conf-if-te-o/50)# iscsi profile-compellent
Application of Quality of Service to iSCSI Trac Flows
You can congure iSCSI CoS mode. This mode controls whether CoS (dot1p priority) queue assignment and/or packet marking is
performed on iSCSI trac.
When you enable iSCSI CoS mode, the CoS policy is applied to iSCSI trac. When you disable iSCSI CoS mode, iSCSI sessions and
connections are still detected and displayed in the status tables, but no CoS policy is applied to iSCSI trac.
You can congure whether the iSCSI optimization feature uses the VLAN priority or IP DSCP mapping to determine the trac class queue.
By default, iSCSI ows are assigned to dot1p priority 4. To map incoming iSCSI trac on an interface to a dot1p priority-queue other than 4,
use the CoS dot1p-priority command (refer to QoS dot1p Trac Classication and Queue Assignment). Dell Networking
recommends setting the CoS dot1p priority-queue to 0 (zero).
You can congure whether iSCSI frames are re-marked to contain the congured VLAN priority tag or IP DSCP when forwarded through
the switch.
NOTE: On a switch in which a large proportion of trac is iSCSI, CoS queue assignments may interfere with other network
control-plane trac, such as ARP or LACP. Balance preferential treatment of iSCSI trac against the needs of other critical data
in the network.
542 iSCSI Optimization