Reference Guide

• iSCSI DCBx TLVs are supported.
The following illustration shows iSCSI optimization between servers and a storage array in which a stack of three
switches connect installed servers (iSCSI initiators) to a storage array (iSCSI targets) in a SAN network. iSCSI
optimization running on the master switch is configured to use dot1p priority-queue assignments to ensure that iSCSI
traffic in these sessions receives priority treatment when forwarded on stacked switch hardware.
Figure 56. iSCSI Optimization Example
Monitoring iSCSI Traffic Flows
The switch snoops iSCSI session-establishment and termination packets by installing classifier 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 identifies IP packets to or from these ports as iSCSI traffic.
You can configure the switch to monitor traffic 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.
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