Administrator Guide

Figure 58. Example of iSCSI Optimization
Monitoring iSCSI Trac Flows
The switch snoops iSCSI session-establishment and termination packets by installing classier rules that trap iSCSI protocol packets to the
CPU for examination.
Devices that initiate iSCSI sessions usually use well-known TCP ports 3260 or 860 to contact targets. When you enable iSCSI optimization,
by default the switch identies IP packets to or from these ports as iSCSI trac.
You can congure the switch to monitor trac for additional port numbers or a combination of port number and target IP address, and you
can remove the well-known port numbers from monitoring.
Application of Quality of Service to iSCSI Trac Flows
You can congure iSCSI CoS mode. This mode controls whether CoS (dot1p priority) queue assignment and/or packet marking is
performed on iSCSI trac.
When you enable iSCSI CoS mode, the CoS policy is applied to iSCSI trac. 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 trac.
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iSCSI Optimization